1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Delvig [45]
3 years ago
5

An important response mechanism in our bodies is blood clotting. The response loop is initiated when injured tissue releases sig

nal chemicals that activate platelets in the blood. An activated platelet releases chemicals to activate more platelets, causing a rapid cycle and the formation of a blood clot.
a)Is blood clotting an example of a positive or negative feedback mechanism? Explain your answer based on the description of the mechanism.

b)Blood clotting must happen quickly in order to be useful to the body. Explain how this type of feedback mechanism is useful for accelerating the clotting process.

c)Imagine that a toxin in the bloodstream denatures the molecules that signal for platelets. Predict how this would affect this feedback mechanism and the person’s body as a result.
Biology
1 answer:
garri49 [273]3 years ago
7 0

1) A blood clotting or coagulation is an example of positive feedback mechanism. It is a mechanism where the output enhances the original stimulus: platelets release chemicals that attract more platelets.

2) This mechanism starts when the wall of the

vessel releases chemicals that initiate the formation of a blood clot (platelet congregation). As more platelets gather, more chemicals are released and the process gets faster and faster until the clot is formed.

3) The positive feedback mechanism might be broken and consequently, the blood can’t clot properly. Bleeding disorder can occur because of the excessive or prolonged bleeding .


You might be interested in
Anyone know how to do this?
bixtya [17]

Answer:

Condensation, melting, evaporation, then it is either 1 or 2

Explanation:

4 0
2 years ago
What. Sphere makes up 75 percent of gasses on earth
Allushta [10]
I'm not quite sure what you mean by which sphere, but I found that the most abundant gas on earth is nitrogen at 78%. Hope this helps
6 0
3 years ago
Read 2 more answers
Can someone help on this science question for BRAINLIEST please.
kakasveta [241]

Answer:

most at of earth s water is salt water found in oceans

4 0
3 years ago
Explain any two specific adaptation that allow animal to survive in Mountain habitat<br><br>​
IRISSAK [1]

Answer:

Among others, two adaptations might be

  1. Avoiding corporal heat loss
  2. Increasing oxygen absorption  

Explanation:

Up in the mountains, there is low oxygen, food is scarce, and adverse meteorological conditions. Animals and plants need to develop different strategies to survive. These adaptations involve not only physical and physiological changes but also behavioral changes. To mention a few adaptations, we can name:

  • Avoiding heat loss. Temperature tends to be very low at highs, so, to <u>avoid heat loss,</u> animals develop shorter legs, tails, and ears. By doing this they reduce the area or surface of heat loss and also avoid getting frozen. In mammals, the coat is also very important. A thick coat helps them maintain a constant body temperature and keep warm. Some amphibians might also develop a thicker skin as they can not regulate their temperature, and it also helps them not to dehydrate.
  • Camouflage: Coat is also helpful in camouflaging. Mammals´ hair color depends on their environment. Some animals, such as hares, can also change their fur color depending on the season. During snow seasons they turn white, and during the warmer season, they turn yellow or brown.
  • Size and metabolism: Small mammals lose heat very fast, so they need to keep active and feeding most of the time. They have an elevated metabolism to keep warm. On the contrary, big animals, such as bears, need to hibernate to reduce their metabolism and get to survive, otherwise, they would need many reserves to cover their energetic requirements.
  • Oxygen absorption: Some animals have adapted to the lack of oxygen by increasing their heart and lungs capacity as well as their capability to absorbing more oxygen from the blood.  
5 0
3 years ago
Use a Punnett square diagram to show why, for each pregnancy, the chances of giving birth to either a boy or a girl are 50-50. E
ikadub [295]

Answer:

Because the offspring of a male and female are always going to be xx, xx, xy, or xy.

Explanation:

Remember that men have different reproductive chromesomes than women. Women have 2 x chromesomes(xx) while men have 1 x and 1 y(xy). These are given down to their offspring.

So we can write the this out in a punnet square as(link down below).

After you see the visual, you will find that the genotypes are xx, xx, xy, xy.

As I said above, women have sex chromesomes xx, while men have sex chromesomes xy. When you match the genotypes on the punnet square with the ones we know from men and women, we find that two of them match with men and two match with female.

So with this, we can conclude that 2/4 of offspring will always be male and 2 will be female. And as you well know 2/4 is 1/2 which is 50%.

3 0
2 years ago
Other questions:
  • Cuticle, stomata, and vascular tissue are all key adaptations enabling land plants to _____.
    13·1 answer
  • Gene expression is often assayed by measuring the level of mrna produced from a gene. what level of the control of gene expressi
    5·2 answers
  • Why are organisms classified? 
    9·1 answer
  • Which of the following statements would explain a testcross involving F1 dihybrid flies in which more parental-type offspring th
    10·1 answer
  • Between 1960 and 2010 the concentration of co2 in the atmosphere increased by
    6·1 answer
  • Which of the following is not a function of proteins:
    14·1 answer
  • Which of the following statements about the role of ATP in cell metabolism is true?
    5·2 answers
  • The question is in the screenshot
    10·1 answer
  • PLEASE HELP ME
    6·1 answer
  • Karl Marx promoted Which economic idea?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!