BIOS 1705 Chapter 39 Exam Questions With
100% Verified Answers!!
Birds are able to extract more oxygen than mammals from an equal volume of air. Which
of the following statements reflects why birds are able to do so?
Birds don't have air mixing in their lungs; air flows in a unidirectional manner across the lung
surface for increased diffusion.
During certain stressful moments, some individuals will begin to hyperventilate—that is,
their breathing will be very shallow and quick. A by-product of hyperventilation is much
lowered levels of CO2 in the blood. Which of the following would you also expect to find?
(Select all that apply.)
decreased stimulation of chemoreceptors in the brainstem
increased blood pH, greater than 7.2
is the process by which molecules of a substance
move from regions of high concentration to regions of low concentration (until an
equilibrium is reached).
Diffusion (I think, its not osmosis because it yelled at me)
Insects possess _____ circulatory systems, circulatory systems in which hemolymph
completely "bathes" the organs and is not typically contained in distinct arteries or veins.
open
In which of the following heart chambers would deoxygenated blood be found?
right atrium and right ventricle
Which of the following would increase the rate of oxygen diffusion from the air into the
body cells of a flatworm?
increasing the surface area of the body
, Cells in which of the following regions of the heart produce action potentials, thus
orchestrating a "regular" heartbeat?
atrioventricular node
Which of the following relationships BEST describes the partial pressure of oxygen (pO2)
in the lung (alveolar air), red blood cells, and blood plasma?
pO2 red blood cell < pO2 blood plasma < pO2 lung
The most important factor in the control of breathing is the amount of oxygen in the blood.
False
Aneurysms are the result of which of the following? (Select all that apply.)
the deterioration of elastin and collagen in arteries
pressure pulses in arteries
Which of the following statements is FALSE?
The walls of the right ventricle are thicker than the walls of the left ventricle.
The heartbeat originates in the:
sinoatrial node located at the junction of the vena cava and the right atrium.
What function do collagen and elastin have in arteries?
They provide elastic rebound of the arterial wall to help smooth out blood flow.
How is a fetus able to extract O2 from its mother's blood?
Fetal hemoglobin has a higher affinity for O2 than maternal hemoglobin.
The binding of one O2 molecule to hemoglobin makes it easier for additional O2 molecules
to bind.
True
Osmosis requires:
100% Verified Answers!!
Birds are able to extract more oxygen than mammals from an equal volume of air. Which
of the following statements reflects why birds are able to do so?
Birds don't have air mixing in their lungs; air flows in a unidirectional manner across the lung
surface for increased diffusion.
During certain stressful moments, some individuals will begin to hyperventilate—that is,
their breathing will be very shallow and quick. A by-product of hyperventilation is much
lowered levels of CO2 in the blood. Which of the following would you also expect to find?
(Select all that apply.)
decreased stimulation of chemoreceptors in the brainstem
increased blood pH, greater than 7.2
is the process by which molecules of a substance
move from regions of high concentration to regions of low concentration (until an
equilibrium is reached).
Diffusion (I think, its not osmosis because it yelled at me)
Insects possess _____ circulatory systems, circulatory systems in which hemolymph
completely "bathes" the organs and is not typically contained in distinct arteries or veins.
open
In which of the following heart chambers would deoxygenated blood be found?
right atrium and right ventricle
Which of the following would increase the rate of oxygen diffusion from the air into the
body cells of a flatworm?
increasing the surface area of the body
, Cells in which of the following regions of the heart produce action potentials, thus
orchestrating a "regular" heartbeat?
atrioventricular node
Which of the following relationships BEST describes the partial pressure of oxygen (pO2)
in the lung (alveolar air), red blood cells, and blood plasma?
pO2 red blood cell < pO2 blood plasma < pO2 lung
The most important factor in the control of breathing is the amount of oxygen in the blood.
False
Aneurysms are the result of which of the following? (Select all that apply.)
the deterioration of elastin and collagen in arteries
pressure pulses in arteries
Which of the following statements is FALSE?
The walls of the right ventricle are thicker than the walls of the left ventricle.
The heartbeat originates in the:
sinoatrial node located at the junction of the vena cava and the right atrium.
What function do collagen and elastin have in arteries?
They provide elastic rebound of the arterial wall to help smooth out blood flow.
How is a fetus able to extract O2 from its mother's blood?
Fetal hemoglobin has a higher affinity for O2 than maternal hemoglobin.
The binding of one O2 molecule to hemoglobin makes it easier for additional O2 molecules
to bind.
True
Osmosis requires:
