Crossed-extensor reflex prevents you from falling when you suddenly lift one foot off the ground in response to pain.
A withdrawal reflex is the crossed extensor reflex. In the withdrawing limb, the extensors relax while the flexors contract, but in the other limb, the opposite happens. This can be seen, for instance, when someone steps on a nail; the affected leg pulls away, while the other leg bears the weight of the entire body.Contralateral means that the crossed extensor reflex takes place on the side of the body that is opposite from the stimulus. Afferent nerve fiber branches travel from the stimulated side of the body to the opposite side of the spinal cord to cause this response.They make connections with interneurons there, which then stimulate or inhibit alpha motor neurons to he muscles of the contralateral limb.learn more about Crossed-extensor reflex here: https://brainly.com/question/23243906
#SPJ4
Give three reason why specialized systems are necessary in large multicellular organisms
Answer:
Specialized systems are necessary in large multicellular organisms since 1. there is a division of labor between cells, 2. many individual cells cannot work together without coordination, and 3. most of the cells are not in direct contact with the outside environment
hope it helps
pls mark me as brainliest
Specialized systems are necessary in large multicellular organisms since 1. there is a division of labor between cells, 2. many individual cells cannot work together without coordination, and 3. most of the cells are not in direct contact with the outside environment.
A rusty nail is an example of an oxidation-reduction reaction.
A. True
B. False
Answer:true
Explanation:
What type of material did the water most likely encounter when it stopped?
Answer:
Rocks
Explanation:
Rocks normally stop streams
Which of the following most accurately describes the National Postsecondary Agricultural Student Organization?
(a)A rival group to FFA.
(b)2.A group similar to FFA but for graduate students.
(c)A group similar to FFA but for college students.
(d)The British version of FFA.
Answer:
Explanation:
a
Answer:
It's a
Explanation:
With respect to normal base pairing, when a molecule of DNA replicates, thymine will most likely pair with 2 points
Answer: Adenine
Explanation:
The structure of the DNA double helix is complex in nature. There are two strands of DNA that are wound around each other. The nitrogenous bases are bonded with hydrogen bonding and base complementarity. According to the Chargaff's rule of base complementarity adenine always pairs with the thymine and guanine with cytosine. These nitrogenous bases are paired on the basis of hydrogen bonding. Adenine bonded with thymine through two hydrogen bonds whereas the cytosine pairs with guanine via three hydrogen bonds. During DNA denaturation these hydrogen bonds are broken whereas during DNA replication these hydrogen bonds are formed between the nitrogenous bases.
But this on your own sentences please
How did scientists begin to Mark divisions in the geologic time scale in response to a change they discovered in the geologic record
Answer:
Scientists began to mark division on the geologic time scale when patterns and similarities started emerging from archeological studies. Patterns such as the discovery of fossils that were formed within the same period.
Explanation:
Geologists who study matter that make up the Earth's crust (whether solid gaseous or liquid), as well as matter from other terrestrial planets and the processes that influence the formation and condition of this matter, are called geologists.
They have successfully calibrated history into various phases of time intervals. These intervals are event-based intervals. For example, you have Eons, Eras, and Periods.
An Eon is a billion years. An example is the Neoproterozoid Eon. Eons are made up of several Eras and Eras are made up of periods. An example of an era is the Mesozoic era. Whilst periods are smaller units of an era, eg. Triassic era.
As scientists deduced the causes for the formation of fossils and topographical remains/patterns, they collected events that occurred within the same time period and group them together.
This range of events became known as the geological time scale.
The age of fossils and rocks is also used to map out the calibrations on the scale.
The age of fossils and rocks is determined using the process of radioactive dating.
Cheers
Which feature is forming?
Oceanic crust
Continental
crust
Lithosphere
Lithosphere
Asthenosphere
Answer:
An island
Explanation:
for me i got it right
put "Speciation" in a sentence
Answer:
It flies in the face of currently accepted views of speciation.
Answer:
chromium speciation by different methods of practical use for routine in situ measurement.
Explanation:
The effect of disorder of checkpoints proteins and cell cycle regulation
I need help!!!!!!???
Answer:
LEARNING OBJECTIVES
Identify important checkpoints in cell division
Explain how errors in cell division are related to cancer
The length of the cell cycle is highly variable, even within the cells of a single organism. In humans, the frequency of cell turnover ranges from a few hours in early embryonic development, to an average of two to five days for epithelial cells, and to an entire human lifetime spent in G0 by specialized cells, such as cortical neurons or cardiac muscle cells. There is also variation in the time that a cell spends in each phase of the cell cycle. When fast-dividing mammalian cells are grown in culture (outside the body under optimal growing conditions), the length of the cycle is about 24 hours. In rapidly dividing human cells with a 24-hour cell cycle, the G1 phase lasts approximately nine hours, the S phase lasts 10 hours, the G2 phase lasts about four and one-half hours, and the M phase lasts approximately one-half hour. In early embryos of fruit flies, the cell cycle is completed in about eight minutes. The timing of events in the cell cycle is controlled by mechanisms that are both internal and external to the cell.
Explanation:
Regulation of the Cell Cycle by External Events
Both the initiation and inhibition of cell division are triggered by events external to the cell when it is about to begin the replication process. An event may be as simple as the death of a nearby cell or as sweeping as the release of growth-promoting hormones, such as human growth hormone (HGH). A lack of HGH can inhibit cell division, resulting in dwarfism, whereas too much HGH can result in gigantism. Crowding of cells can also inhibit cell division. Another factor that can initiate cell division is the size of the cell; as a cell grows, it becomes inefficient due to its decreasing surface-to-volume ratio. The solution to this problem is to divide.
Whatever the source of the message, the cell receives the signal, and a series of events within the cell allows it to proceed into interphase. Moving forward from this initiation point, every parameter required during each cell cycle phase must be met or the cycle cannot progress.
Regulation at Internal Checkpoints
It is essential that the daughter cells produced be exact duplicates of the parent cell. Mistakes in the duplication or distribution of the chromosomes lead to mutations that may be passed forward to every new cell produced from an abnormal cell. To prevent a compromised cell from continuing to divide, there are internal control mechanisms that operate at three main cell cycle checkpoints. A checkpoint is one of several points in the eukaryotic cell cycle at which the progression of a cell to the next stage in the cycle can be halted until conditions are favorable. These checkpoints occur near the end of G1, at the G2/M transition, and during metaphase
plz mark me as brainleast my friend
Put "Allele Frequency" in a sentence
Answer:
With this data we can built a map of allele frequency and geographic location.
Answer: Here are a variety of sentences you could use...
1. Jensen was born with blue eyes because each of his parents gave him a recessive allele for the trait.
2. The dominant allele is the one that determines a physical characteristic or trait.
3. Because Jill’s parents both gave her the dominant allele for curly hair, she has a wavy hair texture.
4. Which allele is responsible for blonde hair, the recessive allele or the dominant allele?
5. On the other hand, the recessive allele is always overshadowed by its dominant partner.
what are the factors affecting brilliance of stars
the age of the star because just like people as they grow older they become weak and so arr the stars their brilliance fade when they become older.
What are 2 facts about energy?
Answer: Only 10 percent of energy in a light bulb is used to create light. ...
The amount of energy Americans use doubles every 20 years. ...
Explanation:
Which is an example of a ray-fin fish?
lungfish
O coelacanth
O shark
salmon
Explanation:
its showing all but salmon so im not sure,sorry, still trying
Answer: Salmon
Explanation:
bones
Select the item(s) that describe a producer.
1.takes energy from the sun
2.helps rot dead organisms
3.fungus
4.tall grass
5.food is mostly animal
6.plant eater
multiple choice
Answer:
3. fungus
4. tall grass
5. food is mostly animal
Please help!
..........
Answer:
我期望1个是正确的答案 并问老师好
Explanation:
你可以在书中找到
what is a tumor and what does it have to do with mitosis
ASAP
will give brainliest
Answer:
Tumors constantly undergo mitosis.
Explanation:
Tumors are (generally) considered to be cancerous; therefore, they divide uncontrollably. Tumors undergo mitosis just like any other cell in your body but can be dangerous over time if not dealt with.
Answer:
What is cancer and what does it have to do with mitosis?
Cancer: mitosis out of control
Mitosis is closely controlled by the genes inside every cell. Sometimes this control can go wrong. If that happens in just a single cell, it can replicate itself to make new cells that are also out of control. These are cancer cells.
Explanation:
Forgive me if my answer is wrong and please give me BRAINLEST I really need them just give me 5 star rating to give me BRAINLEST
When you by strawberry is "TEXTURE " matters? and why is that?
Answer:
Yes, it does.
Explanation:
If the strawberry you buy is all soggy and way too soft, it is likely rotten, while the normal texture we are used to shows that it is edible.
Answer:
Frozen strawberries were characterized organoleptically by a moist, soft and limp appearance, and poor shape retention. They felt very soft, moist, limp and slightly slimy in the mouth. Interior fibers had a tough texture.
Super easy. Please help
Answer:
Identical twins tend to be more similar to each other than fraternal twins do.
Explanation:
WILL GIVE BRAINLIEST!!
A magnetic globe is being held down on a base. When released, the globe rises above the base and eventually comes to rest floating above the base.
In which position shown does the globe have the greatest magnetic potential energy?
Answer:
Position 1 as the magnetic potential energy is waiting to be released when the hand moves.
Explanation:
Type Newton's Second Law of Motion as it is written.
Answer:
I hope you understand please give brainliest
Explanation:
Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Answer:
Yes it is written that second law of Newton is motion of an object
Put "Evolution of Populations" in a sentence
Answer:
animals are examples of evolution of population
Explanation:
Structure that display characteristic of living organisms only within living cells
this is the answer I hope it helps u
please help!! i’ll mark brainliest
Answer:
See if that helps, im pretty sure it increases :)
Explanation:
The rate of photosynthesis does not increase with higher temperatures for all plants. Plants which grow in colder climates have an optimum rate of photosynthesis at low temperatures. Therefore different types of plants have optimum temperatures for photosynthesis.
1. DNA base sequence: GACGATGTAGCATCGACCATTG.
What would the mRNA sequence for this sequence of DNA be?
describe how acid precipitation affects ecosystems
will give brain crown thingy
Answer: Acid rain makes such waters more acidic, which results in more aluminum absorption from soil, which is carried into lakes and streams. Trees' leaves and needles are also harmed by acids... They are most clearly seen in aquatic environments, such as streams, lakes, and marshes where it can be harmful to fish and other wildlife.
Explanation: YW <3
Which of the following has to
occur in order for mammals to
create offspring?
A. fertilization
B. self-reproduction
C. mutation
D. self-fertilization
The total number of cells in an organism increases as a result of which process?
A respiration
B. photosynthesis
C cell division
D fermentation
Answer:
I am pretty sure that the answer is C.
Hopes this helps.
Have a great day!!!!!!!
what are some products that come from plants?
Answer:
Aspirin tablets. Sponges. ...
Sponges made from trees. Chewing Gum. ...
Sapodilla tree. Carnauba Wax. ...
Copernicia prunifera. Henna Dye. ...
Henna tattoo. Rubber. ...
Tapping into trees for rubber.
Answer:
Rubber, sponges
Explanation:
these are Frome trees
What is the strengths and weaknesses of the various developments in science and technology
Answer:
Strengths, Weaknesses, Opportunities and Challenges ... Some have “ centres for research and development” while others ...