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
quester [9]
3 years ago
7

The semilunar valves of the heart open at the onset of the ejection period. Approximately what percentage of the stroke volume i

s ejected during the first quarter of systole?
Biology
1 answer:
mr Goodwill [35]3 years ago
7 0

The percentage of the stroke volume is ejected during the first quarter of systole will be approximately 60% to 65%

<u>Explanation:</u>

The time interval between the atria contraction and the relaxation of ventricles are called as a Cardiac cycle. Systole denotes the heart contraction during the blood pumping. Diastole refers to the heart relaxation when the blood is filled in the heart chambers. The total blood is not fully pumped by the ventricles.

Instead they will pump only a proportion of blood in each of the cardiac cycle.  The ejection fraction refers to the proportion of the intraventricular volume that is received as a output in circulation process. A human with normal heart functioning can have approximately 60-65%. This is known to be stroke volume. The blood volume that is ejected is strove volume.

You might be interested in
After you’ve removed a loopful of broth culture from the culture tube, what’s your next step in preparing a smear?.
Vera_Pavlovna [14]

Given what we know, after you’ve removed a loopful of broth culture from the culture tube you should immediately apply a flame to the open end of the test tube.

<h3>Why would this be the next step?</h3>

Once you have removed the loopful of broth culture from the tube, you should apply a flame to the end of the tube, this is of vital importance. The reason for this is to deny any other contaminants from entering or exiting the culture sample.

Therefore, we can confirm that after you’ve removed a loopful of broth culture from the culture tube you should immediately apply a flame to the open end of the test tube.

To learn more about culture tubes visit:

brainly.com/question/5228823?referrer=searchResults

5 0
2 years ago
What can be observed on the empty plastic bag?​
Maksim231197 [3]
29 dollars candy candyYou can see inside of the empty plastic bag because the day in the life
8 0
2 years ago
Read 2 more answers
The controls the materials that enter and<br> leave the cell.
zysi [14]
Cell membrane is the answe
5 0
2 years ago
Which is a pathogenic microbe
stich3 [128]
Invasion and multiplication of pathogenic microorganisms<span> in the body is called an infection. When we are infected by </span>pathogens<span> we become sick, which means that our bodies stop functioning properly. Infectious agents, such as </span>bacteria<span>, a virus, fungi or protozoa cause communicable diseases.</span>
8 0
3 years ago
Read 2 more answers
What will happen to aquatic organisms if solid water were denser than liquid water
ruslelena [56]
 <span>If the density of ice were greater than water, ice would sink to the bottom of oceans/seas/lakes etc. This ice would cool the water so much that more water would freeze, and the entire body of water would soon be a giant block of ice! You can imagine how this would affect aquatic life</span>
4 0
3 years ago
Other questions:
  • Amino acids that become acetyl-coa as a result of deamination are designated ketogenic amino acids because
    6·1 answer
  • Which of these nucleic acids moves the code for protein synthesis from the nucleus to the ribosomes?
    5·1 answer
  • Cells that are active in protein synthesis are filled with which of the following?
    11·2 answers
  • A chemist has two compounds that do not chemically react. He thinks that by finding the right catalyst, he can get them to react
    5·1 answer
  • The stringent response a.ensures that the cell has a large number of ribosomes for translation. b.occurs in response to sugars o
    7·1 answer
  • Question text The skeleton of an echinoderm is composed of individual plates called
    9·1 answer
  • Why are some of Carl Linnaeus’s classifications of organisms incorrect? Linnaeus did not study the anatomy of organisms. Linnaeu
    16·2 answers
  • Which atom is involved in giviiſig your heart energy to beat?
    11·1 answer
  • Which parts of plants do humans eat?
    5·2 answers
  • ) What happens when a phosphate group is removed from an ATP molecule?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!