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
Alla [95]
3 years ago
10

The "lub" heart sound is due to the Select one: a. onward rush of blood to the heart. b. contraction of aortic muscle tissue. c.

closing of the semilunar valves. d. closing of the atrioventricular valves. e. the recoil of the aorta following the ventricle contraction.
Biology
2 answers:
adelina 88 [10]3 years ago
7 0

Answer: Option D.

The lub heart sound is due to the closing of atrioventricular valves.

Explanation:

Heart sounds are noises that are generated from beatings from heart and from blood that flows through it. The heart sound reflect the turbulence generated when the heart valves snap shut. Lub is the first heart sound also called S1 and it is caused by turbulence and closure of the atrioventricular valves(mitral and triscupid valves) at the start of systole. The second sound is the dub sound which caused by the closing of aortic and pulmonic valves at the end of systole.

jek_recluse [69]3 years ago
4 0

Answer:

D.

The lub heart sound is due to the closing of atrioventricular valves.

Explanation:

You might be interested in
Lymph fluid is the intermediary between the blood in the capillaries and the
mestny [16]
<span>The Lymph fluid acts as an intermediary between the blood in the capillaries and the tissue.</span>
8 0
3 years ago
Which role do plants play in the nitrogen cycle?
irina1246 [14]

Answer:

C .they take up the usable forms of nitrogen found in the soil .

Explanation:

7 0
2 years ago
Why is it imprtant for the ova and sperm cell to each contain a haploid number of chromosomes?
Katyanochek1 [597]

Meiosis makes sperm and eggs. ... The result is 4 haploid daughter cells known as gametes or egg and sperm cells (each with 23 chromosomes – 1 from each pair in the diploid cell). At conception, an egg cell and a sperm cell combine to form a zygote (46 chromosomes or 23 pairs).

HOPE THIS HELPS AND GOOD LUCK


MARK BRAINLIEST PLZ!!!!!!!!!!!!!!!

4 0
3 years ago
Viruses smaller than the host they infect
irina [24]
Viruses are much smaller then cells, viruses have genetic material DNA or RNA and cells also have genetic material
7 0
3 years ago
Describe the nonspecific immune system
andriy [413]
The immune system<span> is made up of a chain of cells, tissues, and organs that work together to protect the body. </span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • Water is considered the universal solvent because it can dissolve
    5·1 answer
  • Some antimicrobial chemicals are considered to be disinfectants and antiseptics. some antimicrobial chemicals are considered to
    6·1 answer
  • Which of the following statements is considered true of Neanderthals?
    15·2 answers
  • Water changes from a liquid to a gas in the process of evaporation
    9·2 answers
  • The ischemic penumbra can maintain metabolic demand with marginal blood flow from collateral circulation for a maximum of _____
    14·1 answer
  • Name and describe the key components of the two major divisions of the nervous system.
    15·1 answer
  • _______ are the preserved or mineralized remains or imprints of that lived long ago
    11·1 answer
  • Select all that apply: which of the following organisms have been artificially selected? A) Horses. B) Cats. C) Eagles. D) Dogs.
    13·2 answers
  • 25 points
    13·1 answer
  • Question 7: What conclusions can you make about how a change in the condition of the ocean affects the different species in cora
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!