Physiology-BIOL 3324 Exam 3 Practice
Test
Resistance increases when:
a. radius increases
b. length decreases
c. viscosity increases
d. hemtocrit decreases
e. none of these answers - Answer-c. viscosity increases
The QRS complex represents:
a. depolarization of the atria
b. depolarization of the ventricles
c. AV nodal delay
d. repolarization of the ventricles
e. the time during which the heart is contracting - Answer-b. depolarization of the ventricles
-atria depolarization is at the P-wave
-AV nodal delay occurs from P-S
-Ventricle repolarization occurs at the T-wave.
-Occurs during systole
The term used to describe the amount of blood pumped out of the heart during one contraction.
a. cardiac output
,b. heart rate
c. end diastolic volume
d. stroke volume
e. end systolic volume - Answer-d. stroke volume
The defining word "one contraction" is what separates it from cardic output, which is the amount of
blood pumped out in a minute (L/min).
Which of the following factors produce an outward pressure (e.g. from the capillaries
into the interstitial space) on the blood vessels?
a) Interstitial fluid-colloid osmotic pressure
b) Interstitial fluid hydrostatic pressure
c)Plasma colloid osmotic pressure
d) Both (a) and (c) - Answer-a) interstitial fluid-colloid osmotic pressure, where there is a low amount of
protein in the IF, but can pull H2O into the IF.
b) interstitial fluid hydrostatic pressure is the pressure of the IF on the outside of the vessel.
c) plasma colloid osmotic pressure has a high amount of protein and low amount of H2O, so absorption
occurs.
Which of the following statements concerning erythrocytes is incorrect?
a)
Erythrocytes do not contain any organelles.
b)
Erythrocytes are extremely pliant.
c)
,Erythrocytes originate from the same undifferentiated pluripotent stem cells as
leukocytes and platelets.
d)
Erythrocytes are unable to utilize the oxygen they contain for their own ATP
formation.
e)
Erythrocytes only live about 5 days - Answer-e)
Erythrocytes only live about 5 days
Which of the following statements is untrue regarding the clotting cascade:
a)
Activation of the clotting cascade by intrinsic factors is faster than activation
via extrinsic factors.
b)
The advantage of the clotting cascade is to rapidly amplify the clotting
response.
c)
Activation of the clotting cascade by extrinsic factors is faster than activation
via intrinsic factors.
d)
The ultimate step of the clotting cascade is the conversion of fibrinogen into
fibrin. - Answer-a)
Activation of the clotting cascade by intrinsic factors is faster than activation
via extrinsic factors.
, When central chemorecptors detect a drop in the pH of the cerebrospinal fluid:
a)
medullary respiratory centers trigger an increase in rate and depth of breathing.
medullary respiratory centers trigger a decrease in rate and depth of breathing.
b)
c)
pontine respiratory centers trigger a decrease in rate and depth of breathing.
d)
the vagus and phrenic nerves stimulate decreased production of the catalyst
carbonic anhydrase. - Answer-a)
medullary respiratory centers trigger an increase in rate and depth of breathing.
medullary respiratory centers trigger a decrease in rate and depth of breathing.
Imagine someone who drank too much water before running a race. Their blood
would be:
a)
high viscosity and therefore have high resistance.
b) high viscosity and therefore have low resistance
c)low viscosity and therefore have high resistance.
d)low viscosity and therefore have low resistance. - Answer-d)low viscosity and therefore have low
resistance.
The direction of the impulse through the conduction system of the heart for each
cardiac cycle is normally:
a)
AV node → SA node → bundle of His → Purkinje fibers
Test
Resistance increases when:
a. radius increases
b. length decreases
c. viscosity increases
d. hemtocrit decreases
e. none of these answers - Answer-c. viscosity increases
The QRS complex represents:
a. depolarization of the atria
b. depolarization of the ventricles
c. AV nodal delay
d. repolarization of the ventricles
e. the time during which the heart is contracting - Answer-b. depolarization of the ventricles
-atria depolarization is at the P-wave
-AV nodal delay occurs from P-S
-Ventricle repolarization occurs at the T-wave.
-Occurs during systole
The term used to describe the amount of blood pumped out of the heart during one contraction.
a. cardiac output
,b. heart rate
c. end diastolic volume
d. stroke volume
e. end systolic volume - Answer-d. stroke volume
The defining word "one contraction" is what separates it from cardic output, which is the amount of
blood pumped out in a minute (L/min).
Which of the following factors produce an outward pressure (e.g. from the capillaries
into the interstitial space) on the blood vessels?
a) Interstitial fluid-colloid osmotic pressure
b) Interstitial fluid hydrostatic pressure
c)Plasma colloid osmotic pressure
d) Both (a) and (c) - Answer-a) interstitial fluid-colloid osmotic pressure, where there is a low amount of
protein in the IF, but can pull H2O into the IF.
b) interstitial fluid hydrostatic pressure is the pressure of the IF on the outside of the vessel.
c) plasma colloid osmotic pressure has a high amount of protein and low amount of H2O, so absorption
occurs.
Which of the following statements concerning erythrocytes is incorrect?
a)
Erythrocytes do not contain any organelles.
b)
Erythrocytes are extremely pliant.
c)
,Erythrocytes originate from the same undifferentiated pluripotent stem cells as
leukocytes and platelets.
d)
Erythrocytes are unable to utilize the oxygen they contain for their own ATP
formation.
e)
Erythrocytes only live about 5 days - Answer-e)
Erythrocytes only live about 5 days
Which of the following statements is untrue regarding the clotting cascade:
a)
Activation of the clotting cascade by intrinsic factors is faster than activation
via extrinsic factors.
b)
The advantage of the clotting cascade is to rapidly amplify the clotting
response.
c)
Activation of the clotting cascade by extrinsic factors is faster than activation
via intrinsic factors.
d)
The ultimate step of the clotting cascade is the conversion of fibrinogen into
fibrin. - Answer-a)
Activation of the clotting cascade by intrinsic factors is faster than activation
via extrinsic factors.
, When central chemorecptors detect a drop in the pH of the cerebrospinal fluid:
a)
medullary respiratory centers trigger an increase in rate and depth of breathing.
medullary respiratory centers trigger a decrease in rate and depth of breathing.
b)
c)
pontine respiratory centers trigger a decrease in rate and depth of breathing.
d)
the vagus and phrenic nerves stimulate decreased production of the catalyst
carbonic anhydrase. - Answer-a)
medullary respiratory centers trigger an increase in rate and depth of breathing.
medullary respiratory centers trigger a decrease in rate and depth of breathing.
Imagine someone who drank too much water before running a race. Their blood
would be:
a)
high viscosity and therefore have high resistance.
b) high viscosity and therefore have low resistance
c)low viscosity and therefore have high resistance.
d)low viscosity and therefore have low resistance. - Answer-d)low viscosity and therefore have low
resistance.
The direction of the impulse through the conduction system of the heart for each
cardiac cycle is normally:
a)
AV node → SA node → bundle of His → Purkinje fibers
