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
Varvara68 [4.7K]
3 years ago
14

When the atria contract, which of the following is true? a. The AV valves are closed. b. The ventricles are in diastole. c. The

atria are in diastole. d. The semilunar valves are open.
Biology
1 answer:
gizmo_the_mogwai [7]3 years ago
5 0

Answer:

b. The ventricles are in diastole.

Explanation:

Atrial systole is the phase of the cardiac cycle that lasts for about 0.1 sec. During this phase, the atria are contracting. At the same time, the ventricles are relaxed or are in diastole. The pressure of the contraction of atria forces the blood to open the AV valves. The blood enters the ventricles through the open AV valves. During this phase, the semilunar valves are closed as the blood pressure in ventricles is very low. The P wave of ECG represents the atrial systole. This is followed by the systole of ventricles.

You might be interested in
What is sublimatoin
WINSTONCH [101]
A sublimation is a type of phase transition, or a change in a state of matter, just like melting, freezing, and evaporation.
8 0
4 years ago
Read 2 more answers
A scientist discovers a new microscopic structure and hypothesizes that it is a living organism. Which of the following characte
a_sh-v [17]

Answer:

The correct answer will be option-D.

Explanation:

Biologists have identified eight characteristic feature of a living organism which distinguishes the living organism from non-living organism.

The features are that organisms should contain: cells, heredity material, metabolism, reproduction, sensitivity, homeostasis, growth and development.

In the given question, when the scientist hypothesized that structure is living organism then it should show all the options provided as all of these features are shared by the living organism.

Thus, option-D is the correct answer.

6 0
3 years ago
WHat are some examples of passive transport?
musickatia [10]
There are four main types of passive transport: Osmosis, diffusion, facilitated diffusion and filtration.
4 0
3 years ago
Can radiation treatment for cervical cancer cause liver cancer
denis-greek [22]
Any radiation of any kind can cause cancer. So many things today can be connected to cancer that making the assumption that radiation for cervical cancer causes liver cancer is plausible. 
6 0
3 years ago
80 POINTS
slava [35]
Archimedes has gone down in history as the guy who ran naked through the streets of Syracuse shouting "Eureka!" — or "I have it!" in Greek. The story behind that event was that Archimedes was charged with proving that a new crown made for Hieron, the king of Syracuse, was not pure gold as the goldsmith had claimed.hopes this helps
4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the function of DNA in the process of protein synthesis?
    9·1 answer
  • A chemistry student attempts to answer the following question: How many liters of carbon dioxide will be produced if 235g of oxy
    8·1 answer
  • 2. Name three process which move carbon from one reservoir to another, apart from to and from the
    6·1 answer
  • Fossil fuels have been used for years as a source
    12·1 answer
  • ASAP
    8·1 answer
  • A group on the periodic table is best described as a
    15·1 answer
  • What would happen to food chains if all the plants died out ?justify your answer.
    14·2 answers
  • Which type of mutation causes this translation of error that leads to cystic fibrosis?​
    13·1 answer
  • (33) Energy released when organic compounds break down is measured in what unit?
    10·1 answer
  • Explain the relationship between organs and organs systems Use an example of an organ and organ system to explain. Provide your
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!