What prevents the blood in veins from flowing in the wrong direction?.

Answers

Answer 1

Answer:

The heart valves

Explanation:

The heart valves prevent blood from flowing in the wrong direction in the heart. The valves are held in the proper place because of the chordae tendinae.


Related Questions

Help the Rossis understand how it is that Kai has NF1. Did he acquire it from them, or, was his case spontaneous? Explain your reasoning and, in your explanation, include the following terms or concepts, underline each: genotype phenotype, hom0zygous heterozygous inheritance alleles dominant recessive

Answers

Neurofibromatosis type 1, also know as NF1 is a genetic disorder that is caused by gene changes (also called mutations). The NF1 Gene is found on chromosome 17 and it carries the instructions to create a protein called NF! NF1 regulates mitosis, and works to prevent cells from growing and dividing in an uncontrolled way. The cells of individuals with NF1 divide out of control, leading to the creation of tumor. We have found that Kai has one mutation that was detected in the NF1 gene.

Kai may have NF1 Because of the parents may be a carrier The genes we inherit compose our genotype and determine the physical characteristics we possess, our phenotype. Alleles are important for the variations in which the trait can be expressed. The stronger allele is known as the dominant gene, and the weaker allele is known as the recessive gene. A phenotype is an individual's observable traits, such as height, eye color, and blood type.

The genetic contribution to the phenotype is called the genotype. The gene changes can be passed from parent to child, or they can happen on their own. If you have NF1 or NF2, your baby has a 50-percent chance (1 in 2) of inheriting it from you. heterozygous are carriers in recessive genetic disorders a person with recessive alleles but does not display trait, can pass the trait.

When there is two identical alleles of a particular gene that is h.o.m.ozygous and if there is two different alleles of a particular gene or genes, then that is heterozygous.

Neurofibromatosis kind 1, additionally recognise as NF1 is a genetic disease this is due to gene adjustments (additionally referred to as mutations).

The NF1 gene is discovered on chromosome 17 and it includes the commands to create a protein referred to as  NF1 regulates mitosis, and works to save you cells from developing and dividing in an out of control way. The cells of people with NF1 divide out of control, main to the advent of tumor. We have discovered that Kai has one mutation that changed into detected withinside the NF1 gene.Kai can also additionally have NF1 Because of the mother and father can be a provider the genes we inherit compose our genotype and decide the bodily traits we possess, our phenotype.

What is genetic contribution?

The genetic contribution to the phenotype is referred to as the genotype. The gene adjustments may be exceeded from determine to child, or they could occur on their own.

Thus it is clear.

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Muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for.

Answers

Muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for contraction.

What is muscle tissue?

Muscle tissue are body tissues that are made up of cells, these cells helps to produce movement of the various body part.

This movement are enhance through contraction of the muscle and the tissue are adequately supplied with blood vessels.

Therefore, muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for contraction.

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Choose an example of a protein that has quaternary structure

Answers

Answer:

hemoglobin, hemoglobin carries oxygen in the blood and it is made up of four subunits, two each of the α and β types.

Explanation:

Protein can have varying structures namely primary, secondary, tertiary and quaternary. An example of protein with a quaternary structure is hemoglobin.

What are different structures of protein?

The function of protein is completely dependent on its folding. Protein can be folded into many types.

The macromolecule protein can have the following structural classification:

Primary structure: It is a linear chain of amino acids.Secondary structure: The linear chain folds to form secondary structure.Tertiary structure: it involves further folding of protein chain.Quaternaty structure: it is the spatial arrangement of the folded protein.

Hemoglobin is one of the proteins that exhibits quaternary structure.

Thus, hemoglobin is an example of a protein that has quaternary structure.

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The american bison was once common in the prairie, but now wild bison are rare. Like cows, bison eat grass. What kind of organism is a bison?

Answers

Bison just like cows eat grass and are known as herbivores.

What are herbivores?

Herbivores are animals which eat grass or plants as their food.

Herbivores are primary consumers since they obtain their food from the primary producers, plants.

Examples of herbivores are cows, goats, and bisons.

Therefore, since bison eat grass just like cows, bosons are herbivores.

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What system plays a vital role in the existence of the human species?


What's the ans?

Answers

Answer:

The reproductive system.

Explanation:

Without the reproductive system, humans are not able to reproduce meaning the human species would go extinct. With the reproductive system, humans are able to create more humans, in this way humans do not go extinct.

An aquarium is a small closed container in which a selection of living plants and small marine animals are kept and observed. What kind of system is modeled by this setup? A) a wet B) a zoo C) a fish D) an ecosystem

Answers

Answer:

An ecosystem (D)

Explanation:

An ecosystem is a community of interacting organisms and their environment.

What is alternation of generation

Answers

Alternation of generations is a type of life cycle in which subsequent generations of plants alternate between diploid and haploid organisms.

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Which organisms obtain energy from dead or decaying matter? Select two option

Answers

Answer:

Fungi and bacteria

Explanation:

In and agricultural area, heavy rainfall caused a flash flood. the topsoil from a freshly fertilized field washed into a local stream. as a result, the amount of nitrogen in the water drastically increased, causing algae to grow record levels and cover the surface of the stream. what effect did this bloom of algae have on the stream?

Answers

Answer:

The algae can release harmful chemicals known as "bio-toxins" that can contaminate the water and kill the organisms living in the ecosystem

Explanation:

What happens when plants don't get sunlight in space

Answers

Answer:

plants deprived of light will lose their colour and die

Explanation:

the lack of sunlight stunted photosynthesis and therefore the sprouts were not able to produce the chlorophyll needed to treat a green colour

There was a change in the environment between generations 10 and 30. the change likely .

Answers

These adjustments are in all likelihood genetic mutations evolution is the technique of alternating all existing paperwork from one era to the next and evolutionary biology research how this evolution takes place.

Every era of organisms inherits trends owned via way of means of their mother and father via genes. Changes (known as mutations) in this gene will new trends withinside the offspring of an organism. In an organism's populace, a few trends become greater common, even as others will disappear.This technique is known as herbal selection. The profits of greater offspring than the variety of mother and father at the side of the inheritance.

What are heredity mutations?

Hereditary mutations encompass cystic fibrosis, hemophilia, and sickle mobileular disease. Other mutations can occur on their very own at some stage in a person's existence. These are known as sporadic, spontaneous, or new mutations.

Thus it is well explained.

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Answer:

✔ favored trait A

Explanation:

An organism has two different possible traits, A and B. A graph of the population is shown right. Which of the following statements is true about Trait B? Check all that apply.

It decreased in frequency over time.

It became extinct.

It is carried on a recessive allele.

There was a change in the environment between generations 10 and 30. The change likely

✔ favored trait A.

1. Is sneezing and coughing on clothes better than using tissue paper?
2. Do disinfect wipes work effectively?

Answers

Answer:

1. no because the bacteria will stik on your clothes

2. yeah

help me with this exammm <3 pls and ty
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Answers

Answer:

which is an example of interependence between species

Explanation:

If this is Personal to god I am sorry. Anyways, since, god was a human before, Who made the People with him And, Him?

Answers

Speaking form a Christian perspective, God was never a human, he is a being. His son Jesus on the other hand is half human and half god. I personally believe that God was never made and he has always existed. It makes no sense to us humans since all we've ever known was that everything has a beginning and ending. I think there is more to our universe than we are capable of understanding.

The female gametophyte is a _______ structure called an embryo sac, while the male gametophyte is a _______ structure called a pollen grain. When pollen attaches to the stigma of a flower, one of the sperm cells fertilizes an egg cell, producing a _______ zygote. Another sperm cell fertilizes the polar nuclei, forming a ________ endosperm. The _____ will eventually develop into the sporophyte.

Answers

The answers to the blank spaces in the question are as follows:

HaploidHaploidDiploidTriploidZygote

What is double fertilization?

Double fertilization is a specific feature of angiosperms involving two male gametes and one female gamete.

In double fertilization, both the female and male gametes are haploid structures i.e. contain one set of chromosome.

One of the haploid sperm cells fertilizes an haploid egg cell, producing a diploid (2n) zygote. However, the other sperm cell fertilizes the polar nuclei, forming a triploid endosperm.

The zygote will eventually develop into the sporophyte (vegetative plant).

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According to the World Health Organization, persistent organic pollutants (POPs) are found in nearly all tested organism tissues and environmental samples. Which characteristic of POPs accounts for their presence in living tissues and in environmental samples?

Answers

Answer:

POPs are lipophilic, which means that they can be stored in fatty tissues for long periods of time.

Explanation:

Which of the following is a typical product of nuclear fission? a. oxygen b. carbon dioxide c. radiation d. water please select the best answer from the choices provided a b c d

Answers

The answer will be :

C. radiation

Answer:

C

Explanation:

Trust thr process Edge 2022

Click the statement that best describes the role of each element in living organisms.

Nitrogen

Phosphorous

Sulfur

Answers

Answer:

Problem one;
Nitrogen: is obtained by plants from bacteria in the soil.

Phosphorous: provides strength to bones and exoskeletons.

Sulfur: gives strength to the protein keratin.

Problem two:

Answer 1:
King James

Answer 2:
selling shares

Answer 3:
company shareholders

Answer 4:
the James River


Explanation:

Have a great rest of your day
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Hello~

Jay is here to help you love

Answer: Nitrogen

Bye have a nice day love~

From: Jaybella~

(science)
18 point!
i'll give 5 star,1 thank who do all of this question THANK YOU!!!

Answers

Answer:

gravitational

sun 274m/s²

mecury - 3.7 m/s²

earth - 9.807 m/s²

Mars -3.721m/s²

Which actions could be categorized in the “both” section of the Venn diagram?
Check all that apply.

requires oxygen

starts with glycolysis

occurs in the mitochondrion

produces ATP

Answers

Answer:

Starts with Glycolysis

Produces ATP

Explanation:

I just took it

The action that occurs in the mitochondrion starts with glycolysis requires oxygen and produces ATP.

What is glycolysis?

Glycolysis is the metabolic pathway that converts glucose into pyruvic acids. The free energy released in this process is used to form the high-energy molecules adenosine triphosphate ATP. Glycolysis is the process of aerobic respiration.Net gain of two ATP.NADPH is also produced.

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Two starts are visible from Earth ,Star A “appears” brighter than shad B , but their luminosity ( absolute magnitude ) is the same .
Why does star A appear brighter than B ?

Answers

This could be because star A is closer to Earth than star B is, making it appear brighter.

Which is a product of photosynthesis and a reactant of respiration?

Answers

The reactants of photosynthesis are carbon dioxide and water, which are the products of cellular respiration.

Which statement correctly describes a feature of the rock cycle?
O Rocks are preserved through
the process.
O Rocks change from one type to another
Different rock groups are not related to one another.
The rock cycle follows a specific order.
Mark this and retum
Save and Exit
Next
Submit

Answers

Answer:

B

Explanation:

The statement that correctly describes a feature of the rock cycle is: Rocks change from one type to another. In the rock cycle, rocks can be transformed through different processes. The correct option is B.

What is the rock cycle?

The rock cycle is a process by which rocks are transformed from one type to another through a series of physical, chemical, and biological processes. The rock cycle involves the transformation of igneous, sedimentary, and metamorphic rocks, and these three types of rocks are related to one another.

The process of the rock cycle is continuous and does not follow a specific order as rocks can change from one type to another in any direction. The rock cycle is essential to the formation and recycling of rocks on Earth.

Therefore, the correct option is B.

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A marble tile would feel cold as compared to a wooden tile on a winter morning, because the marble tile

(a) is a better conductor of heat than the wooden tile.

(b) is polished while wooden tile is not polished.

(c) reflects more heat than wooden tile.

(d) is a poor conductor of heat than the wooden tile

Answers

Is a poor conductor of heat than the wooden tile

In general, the frequency of crossing over between two linked genes depends on what?

How far apart they are on the chromosome
The characteristics that the genes code for
Whether the genes are dominant or recessive
The phase of meiosis in which the crossing over occurs

Answers

Answer:

Crossovers during meiosis happen at more or less random positions along the chromosome, so the frequency of crossovers between two genes depends on the distance between them.

The closer two genes were to one another on a chromosome, the greater their chance of being inherited together. In contrast, genes located farther away from one another on the same chromosome were more likely to be separated during recombination.

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If two genes are far apart, for example at opposite ends of the chromosome, crossover and non-crossover events will occur in equal frequency. Genes that are closer together undergo fewer crossing over events and non-crossover gametes will exceed than the number of crossover gametes.

Which factors would most likely affect the

weather on a small, flat island in the ocean?

Select all that apply.

A. The formation of dry air masses

B. Ocean surface currents

C. The formation of humid air masses

D. The rain-shadow effect

Answers

Answer:

B. or C.

Explanation:

im pretty sure! I'm in a class like this and I have been studying air masses and air pressure alot!

What will be the PHENOTYPE of all the offspring

A: short hair
B: long hair
C: impossible to know

Answers

Answer: Hello again  The answer you clicked on is correct btw. Its long hair

Explanation:

The alleles would be Ll when the offspring is born and it would only be short hair if it was ll. Anything with capital “L” in it would be a long hair.

At three minutes of all-out high-intensity exercise, ________ of the ATP is derived from aerobic sources.

Answers

Answer:

it is d

Explanation:

D) 60%

hope this helps..

You select cell a1, hover the pointer over the cell border to reveal the move icon, then drag the cell to a new location. Which ribbon commands achieve the same result?.

Answers

Cut and paste is the ribbon command which will ensure the movement of a cell to a new location.

What is a Ribbon?

This is defined as a graphical control element in the form of a set of toolbars placed on several tabs.

Selecting a cell and moving it to a new location can also be done using the copy ad paste option which was why it was chosen as the most appropriate choice.

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How could we slow down or help stop ocean acidification?

Answers

Answer stop using plastic.

Explanation: Hello! My name is Hunter and I am a Marine Biologist within the state of Juno beach Fl, I work at a marine center located there and I teach people about Marine life animals and some ways to approach animals, and more. And here are some ways you can slow down or help stop ocean acidification.   If you care for marine animals take the decision to use glass, wooden, bamboo, or metal etensals. This helps instead of using plastic because most plastic ends up being in the ocean. studies show that about 150 animals die a day from inhaling plastic. Second, Most plastic has acid or a type of smell like the rubber gloves at the dentist, That smell and taste can be extremely toxic and deadly for marine life animals. Third, If you are a fisher or you work on a supply boat, Make sure your oil on the boat doesn't leak, Just because you call someone and they put a net around the oil doesn't mean animals can't get under the net. Animals in the ocean are free, If you're on or work on a supply boat, Make sure to check your oil frequently. Oil leaks happen more than you think if you are not experianced! I hope this helped and how WE can slow down or reduce acdification. Have a great rest of your day or night.

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6)Explain why a 0.010 M solution of hydrochloric acid, HCl has a pH of 2.00 but a 0.010 M solution ofacetic acid, HCH3COO, is 3.37? In 2015, ________ took office as governor of Texas.1.Bill Clements2.Dan Patrick3.Rick Perry4.George W. Bush5.Greg Abbott Help please cus I don't know. Question 2 of 25What does it mean to democratize knowledge?A. To grant everyone the right to own and use a computer or anyother electronic deviceB. To give everyone a chance to decide what knowledge is shared byvotingO C. To give people equal access to information and the ability tocontribute to that informationD. To allow people to decide together what is important for the publicto know Sam is renting one of two cars to go on a 300-mile trip. The first car can travel 75 miles on 5 gallons of gas. The second car can travel 240 miles on 20 gallons of gas. Each car costs the same to rent, and Sam wants to rent the car with the better gas mileage. Sam estimates that he will pay $49.49 for every 14 gallons of gas he has to buy. Which car should Same rent, and how much money should Sam bring for gas? Explain your reasoning (PLEASE HELP- if you have knowledge of this question) What was an important facet of the NATO treaty meant to strengthen the alliance?A. An attack against one member would be considered an attack against all the members.B. Nuclear weapons may be used if the Soviet Union overthrows anydemocracyC. Member countries of NATO would have a shared currency.D. Any country challenging the United States can't be a member of NATO. What are two terms used to describe the moon's phases? 20 POINTSPart EHow many of the 320 million Americans would you predict wear glasses? Good evening! Can someone please answer this, ill give you brainliest and your earning 50 points. Would be very appreciated. Khalil has a game board as shown below, which is a square with 20 cm sides. The area of the largest circle is 314square centimetersWhat is the probability of scoring 1, 3, or 5 points with one randomly thrown dart?O 50% O 62.5%O75%O78.5% The electrical loads in _____ circuits each have the same voltage drop, with equals the total applied voltage of the circuit. Ways in which a teacher plays a role in the literacy development of the learners 1/2x12divided by 2-2 +11= what? Media planners seek to reach the largest possible percentage of their target audience with no monetary limitations. a) True b) False What is the image point of (5,-6)(5,6) after the transformation r_{\text{y-axis}}\circ T_{-4,0}r y-axis T 4,0 ? please only geniussssssssssssssssss Why is self-control important?In your own words pls help Sherwin has twice as many stamps as his friends Allan and Gene combined. Allen has 55 stamps in his collection. Sherwin has 200 stamps in his collection.How many stamps does Gene have in his collection?The equation 2 (x + 55) = 200 models this situation. which choice shows the sequence of operations needed to solve this problem, using both arithmetic and alegbra? Matthew sat inside his car in the parking lot of Arnold's Chicken Palace. He arrived early for his job interview, and he wanted to make sure his attitude was stellar before going inside the restaurant. Unfortunately, he felt petrified. "I can't do this," he told his mother over the phone. "Yes, you can, Matty," his mother said. Matthew's hand shook while he pressed his cell phone more tightly against his ear. "All my potential employers have rejected me," he said. "What if nobody hires me?" "Matthew, you can't think small. Remember who you are, remember your abilities, think about what you want, and then go after it. Shout at it if you have to." "Shout at my potential job?" "Sure, why not?" his mother replied. "I believe in you, and you can believe in yourself too." After Matthew ended his phone call with his mother, he spent a few moments calming himself down. Come on, Matt, you can do this, he thought to himself. You'll be the best manager Arnold's Chicken Palace ever had. While taking deep breaths, he clenched his fists and felt strength surge through his muscular arms. He closed his eyes and thought about all the other jobs he had interviewed for but did not get. He thought about his bills piling up. He knew this interview would be a very important one. Then he shouted as loudly as he could, "This job is mine!" Matthew opened his eyes and saw a woman and a little girl walking past his car. They both scurried away quickly. Embarrassed, Matthew waved at them and cleared his throat. The day after his interview, Matthew received a phone call from the owner of Arnold's Chicken Palace. "I am very pleased to offer you the position of manager at my restaurant," the owner said. "You were a very impressive candidate for the job," he added. "How did you become such a confident person?" Matthew clenched his fist and tried to not shout with excitement. With a smile, he replied, "I guess I just believe in myself."What is the best summary of the passage? A. When Matthew is rejected by other employers, he decides to interview for the post of a manager at Arnold's Chicken Palace. Though Matthew is nervous, he decides to call his mother, who tells him that he should think of all the bills he has to pay. Mathew then closes his eyes to calm himself, gives the interview with confidence, and gets hired as a manager. B. Matthew is nervous about his job interview at Arnold's Chicken Palace for the post of manager and remembers how badly he needs the job to pay his bills and starts getting nervous. Then he recalls his mother's advice to believe in oneself and takes a minute or two to assure himself that all will be fine. He realizes that it is important to stay calm during stressful times. C. Mathew, who has been rejected by several employers, is nervous about his interview at Arnold's Chicken Palace and calls his mom who advises him to be confident, believe in himself, and go after the job with determination. Following this, Matthew confidently interviews at Arnold's and is offered the job. He realizes that belief in oneself surely leads to success. D. When Matthew begins to panic before his interview at Arnold's Chicken Palace, he calls his mother for advice. Hearing his mother's voice and her advice to believe in himself makes Matthew feel confident. Mathew tells himself that he would do well in the interview, and that he would be the best manager at Arnold's Chicken Palace once he is hired. Which of the following expressions are equivalent to 6 + (-4) - 56+(4)56, plus, left parenthesis, minus, 4, right parenthesis, minus, 5?Choose 2 answers:Choose 2 answers:(Choice A)A-(-6+4)-5(6+4)5minus left parenthesis, minus, 6, plus, 4, right parenthesis, minus, 5(Choice B)B6-4-(-5)64(5)6, minus, 4, minus, left parenthesis, minus, 5, right parenthesis(Choice C)C6-(4+5)6(4+5)6, minus, left parenthesis, 4, plus, 5, right parenthesis(Choice D)D6+4-56+456, plus, 4, minus, 5(Choice E)E-(-6)+(-4)-(-5)(6)+(4)(5)