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BSNC 2000 Midterm Quiz Questions with Correct Answers

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BSNC 2000 Midterm Quiz Questions with Correct Answers As blood passes through pulmonary capillaries: a) it delivers oxygen to be used by cells of the lungs. b) hemoglobin saturation drops to 75%. c) hemoglobin affinity for oxygen decreases. d) carbon dioxide enters red blood cells. e) h...

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  • August 15, 2024
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  • 2024/2025
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  • bsnc 2000
  • BSNC 2000
  • BSNC 2000
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BSNC 2000 Midterm Quiz Questions
with Correct Answers

As blood passes through pulmonary capillaries:

a) it delivers oxygen to be used by cells of the lungs.
b) hemoglobin saturation drops to 75%.
c) hemoglobin affinity for oxygen decreases.
d) carbon dioxide enters red blood cells.
e) high PO2drives the loading of hemoglobin with oxygen. - Answer-e) high PO2drives
the loading of hemoglobin with oxygen.

How is the majority of oxygen transported in the blood?
a) dissolved in the plasma
b) as bicarbonate ion
c) bound to globin
d) bound to heme
e) in white blood cells - Answer-d) bound to heme

Central chemoreceptors:

a) are located in the aortic arch and carotid sinuses.
b) are located in the hypothalamus.
c) carry information about blood chemistry to the brain via the vagus and
glossopharyngeal nerves.
d) detect changes in blood oxygen levels.
e) detect increases in hydrogen ion levels in the CSF. - Answer-e) detect increases in
hydrogen ion levels in the CSF.

Cardiac output in a healthy adult ranges from 3.5 to 8.0 L/minute under resting
conditions.

True/ False - Answer-True

The volume of blood in the heart at the end of filling is called the:

stroke volume
afterload
end diastolic volume
end systolic volume - Answer-afterload

An increase in total blood volume will increase preload.

, True/ False - Answer-True

An increase in afterload will increase stroke volume.

True/ False - Answer-False

An increase in heart rate shortens the duration of systole more than diastole.

True/ False - Answer-False

Which of the following will increase myocardial contractility?

hypoxia
beta 1 blockers
a thyroid hormone deficiency
adrenal catecholamines - Answer-adrenal catecholamines

A drug that stimulates the entry of calcium into cardiac muscle fibres:

is a negative inotropic agent
is a positive inotropic agent
will decrease contractility
will decrease stroke volume - Answer-is a positive inotropic agent

The _____________ nervous system contains voluntary motor neurons that innervate
skeletal muscles.

a) somatic
b) central
c) autonomic
d) parasympathetic
e) sympathetic - Answer-a) somatic

The two divisions of the autonomic nervous system are the sympathetic and
parasympathetic.

True/ False - Answer-True

Sensory neurons:
a) are classified as upper or lower.
b) conduct nerve impulses to muscles and glands.
c) contain dendrites with specialized sensory receptors.
d) are also called efferent neurons.
e) are not myelinated. - Answer-c) contain dendrites with specialized sensory receptors.

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