What is the most abundant type of cell in the human body?
A. Neuron
B. Epithelial cell
C. Red blood cell
D. White blood cell
E. Vascular smooth muscle cell
F. Skeletal muscle cell - ANSC
The most abundant substance in the human body and the approximate percentage of that
substance in
the body is which of the following?
A. Protein, 30%
B. Protein, 60%
C. Water, 30%
D. Water, 60%
E. Carbohydrate, 30%
F. Carbohydrate, 60% - ANSD
A large volume of blood is transfused to a person whose baroreceptor blood pressure control
system is
not functioning. Arterial blood pressure rises from the normal level of 100 to 160 mm Hg. If the
same
volume of blood is infused into the same person when the baroreceptor system is functioning,
and this
time the arterial pressure increases from the normal level of 100 mm Hg up to 120 mm Hg, what
is the
gain of the baroreceptor system?
A. -3
B. -2
C. -1
D. 0
E. +1
F. +2
G. +3 - ANSB
Which of the following substances has the highest extracellular fluid to intracellular fluid
concentration ratio for most mammalian cells?
A. Sodium ions
B. Potassium ions
C. Carbon dioxide
, D. Glucose
E. Protein - ANSA
Exchange of substances between the cardiovascular system and the interstitial fluid occurs
mainly in
which of the following?
A. Arteries
B. Arterioles
C. Capillaries
D. Venules
E. Veins - ANSC
What is the approximate distance from the capillaries to most cells of the body?
A. Less than 50 angstroms
B. Less than 50 microns
C. Less than 50 millimeters
D. Less than 100 angstroms
E. Less than 100 microns
F. Less than 100 millimeters - ANSA
When a person is at rest, how much time is required for the blood in the circulation to traverse
the
entire circulatory circuit?
A. 1 second
B. 1 minute
C. 3 minutes
D. 4 minutes
E. 5 minutes - ANSB
______ feedback is often referred to as a "vicious cycle" because it leads to _______ instability
and
sometimes death.
A. Positive, progressive
B. Positive, diminished
C. Negative, progressive
D. Negative, diminished
E. Adaptive, progressive - ANSA
Which of the following is an example of positive feedback in the body?
A. Clotting of blood
B. Return of blood pressure toward normal after a hemorrhage
C. Increased respiration rate caused by accumulation of carbon dioxide in the blood
D. Decreased sympathetic nervous system activity that occurs in response to increased blood
pressure - ANSA