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
attashe74 [19]
3 years ago
5

The papillary muscles contract after the other ventricular muscles so that they can take up the slack on the chordae tendineae b

efore the full force of ventricular contractions sends blood against the atrioventricular (AV) valve flaps.true/false
Biology
1 answer:
sashaice [31]3 years ago
8 0

Answer:

False

Explanation:

The papillary muscles of both right and left ventricles began to contract shortly before the other ventricular muscles (systole) so that they can take up the slack on the chordae tendineae as the full force of ventricular contractions sends blood against the atrioventricular (AV) valve flaps.

They prevent the backward flow of blood to atria from ventricles. So if they contract after the ventricle systole they would not be able to perform their job.

You might be interested in
Secretion of human chorionic gonadotropin (hcg) occurs during what time frame during pregnancy?
masha68 [24]
Secretion of human chorionic gonadotropin [HCG] only occur during pregnancy in the placenta. The concentration of this hormone increase rapidly during the first three months of pregnancy; the amount in the blood stream doubles every two to three days as the development of the placenta and embryo progress. The hormone reaches its maximum concentration peak around the sixth week of pregnancy and after this, its concentration decline.
3 0
3 years ago
What is true of intercellular signals that do not go through direct connections between cells, such as plasmodesmata?
Paha777 [63]

The truth about intercellular signals are nucleus which opens up on an ion-linked channel.

Intercellular signals mediates and ionizes radiation which is being induced by stander effects.

Inorder to get to know more about intercellular signal we have to identify the transducers, receptors and the ligands.

5 0
3 years ago
Read 2 more answers
The evolutionary effects of genetic drift are greatest when _____. see concept 23.3 (page 492)
Tamiku [17]
The evolutionary effects of the genetic drift are the greatest when the population is small.
In small populations, genetic drift can significantly change the frequencies of the alleles and affect the genetic structure of the population. In big populations, the effects of the genetic drift are small and insignificant.
6 0
3 years ago
What happens to a comet when it gets close to the sun? Explain the two tails
juin [17]
When it gets to the it grows warmer and some of the ices heat up and become gas (sublimating), relaying the dust grains that were trapped in the ice. The dusty gas coming from the nucleus is heated by the sun and for,a a glowing hit cloud around the comment called coma.
Hope this help and be safe
4 0
2 years ago
The __________ of the heart rests on the diaphragm, and from its __________, the great vessels emerge (hint: not chambers)
Sergeu [11.5K]
The answer is apex and base. To simplify, the apex of the heart rests on the diaphragm and from its base, the great vessels emerge. In addition, blood vessels that are nearer to the pumping heart and must enlarge to endure pressure variations are named elastic arteries and foramen ovale permits blood to pass from the right to the left atrium, therefore avoiding to pass the fetal lungs. 
4 0
3 years ago
Other questions:
  • Biology question 24.<br> True or False<br> Selective breeding is an example of genetic engineering
    9·1 answer
  • Which class of anti-HIV drug targets the virus before it enters cells?
    11·1 answer
  • Functions of the circulatory, respiratory, digestive, and endocrine systems?
    10·1 answer
  • What is the state in which particles or a substance are mixed with fluid but are undissolved
    8·1 answer
  • What is the approximate carrying capacity of the
    13·2 answers
  • Which landform is created by wind
    15·1 answer
  • +
    12·2 answers
  • B. How does its genotype and phenotype
    15·1 answer
  • A(n) ______ gene is a type of gene that regulates development and that, when mutated, leads to organisms with structures in abno
    12·1 answer
  • The amniotic egg, which is present in reptiles, birds, and mammals, is a good example of: horizontal gene transfer. coevolution.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!