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
Andrej [43]
3 years ago
12

Papillary muscles prevent the AV valves from prolapsing (bulging) excessively into the atria when the ventricles contract. True

False
Biology
1 answer:
marta [7]3 years ago
7 0

Answer:

True

Explanation:

Papillary muscles are the muscles that project out from the walls of the ventricles of the heart. These muscles are attached to the AV valves with the help of chordae tendineae. During the contraction of ventricles, the higher blood pressure closes the AV valves by driving the edges of these valves towards each other. At this time, the contraction of Papillary muscle pulls on and makes the chordae tendineae rigid and right. This does not allow the cusps of the AV valves to ever into the atria in the response to higher blood pressure in ventricles.

You might be interested in
The compliances of two balloons are tested. Balloon A requires pumping air into it to achieve a pressure of 50 cm H2O to inflate
lana66690 [7]

Answer:

qmsl3 also z ls

z kana sleep a

Explanation:

lap. e

4 0
2 years ago
The ________ extends through the hindbrain, midbrain, and forebrain.
Lemur [1.5K]

Answer: option C) Pons

Explanation:

Pons, or better still, the pons Varolii is a band of nerve fibers located within the brain stem. While, the brain stem is known to connect the spinal cord(Hind brain) to the fore brain

Thus, Pons extends through the hindbrain, midbrain, and forebrain.

3 0
3 years ago
When did the mass extinction occur? (Name the era and period)
kherson [118]

Answer:

Explanation:

The first mass extinction is called the Ordovician-Silurian Extinction. It occurred about 440 million years ago, at the end of the period that paleontologists and geologists call the Ordovician, and followed by the start of the Silurian period. In this extinction event, many small organisms of the sea became extinct.

6 0
3 years ago
Which of the following are characteristics of archaeal cell membranes that probably help them survive at very high temperatures?
torisob [31]

Answer:

Option-B, C and E

Explanation:

Archaebacteria are a group of prokaryotes which can survive the extreme conditions. The archaebacteria which can survive very high temperature are called hyperthermophiles. The hyperthermophilic bacteria can survive temperature range between 70 t 125 °C observed in hydrothermal vents.

The archaea bacteria can withstand the high temperature as their membrane is adaptive. The membrane of the archaea is more stable due to the ether linkage which makes carbon less chemically reactive. The phospholipids possess a monolayer which decreases the layer fluidity and thus the unwanted movement of molecules.

The archaea also contain cyclopentane rings in the ester-linked phospholipids which allows tight pacing of the molecules which decrease the movement of solute into and out of the cell.

Thus, the selected options are correct.

6 0
3 years ago
An example of an organism that is a prey
Stolb23 [73]

Answer:rabbits

Explanation:an owl or fox can kill the rabbit and eat it

8 0
3 years ago
Other questions:
  • What is an accessory organ of digestion
    14·1 answer
  • BRAINLIESTTT ASAP!! PLEASE HELP ME :)
    6·1 answer
  • A transform boundary occurs where two tectonic plates _____.
    15·2 answers
  • Which scientist hypothesized that more offspring were born in a population than could survive based on limited resources?
    14·1 answer
  • What dose it mean for a molecule to diffuse down a concentration gradient?
    7·1 answer
  • Which statement describes a cell belonging to a haploid organism that is capable of
    15·1 answer
  • Which two processes in the carbon cycle are also parts of oxygen cycle
    11·1 answer
  • Is it possible for natural selection to create a new species? Explain your answer. *
    5·2 answers
  • If somatic cells are reproduced during mitosis then what kind of cells are produced during meiosis?
    12·2 answers
  • When an object is at rest, what is its speed?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!