PNB 2265 EXAM 1 QUESTIONS WITH
CORRECT ANSWERS
In immediate response to hemorrhage (rapid blood loss and drop in blood pressure),
baroreceptor firing will _____, causing activation of the _____, lading to effects which
include _____. - Answer- Decrease, sympathetic nervous system, constriction of
peripheral arterioles and increased heart rate
Hematocrit is the ratio of _____ to whole blood volume, and a normal value is _____ -
Answer- erythrocytes, 45%
LIKE skeletal muscle, cardiac muscle cells _____. - Answer- Are striated
What is the correct sequence of vessels, starting with the one under the HIGHEST
pressure and ending with the one under the LOWEST pressure? - Answer- Aorta,
capillary, vein, vena cava
Erythropoietin (EPO) is released from - Answer- kidneys
During this phase of the cardiac cycle, pressure inside the right ventricle increases until
it becomes equal to the pressure inside the pulmonary artery - Answer- isovolumic
contraction
An abnormal increase in the number of Red Blood Cells is called - Answer-
polycythemia
The biconcave disk structure of erythrocytes is optimized for diffusion of gases -
Answer- true
A patient with a nonfunctional SA node will be unable to contract the ventricles of their
heart - Answer- false
This question refers to EKG traces in this figure below. At what point are the atria
repolarizing? - Answer- QRS
Cardiac anastomoses - Answer- Webbing of fibers in cardiac muscles only. They pick
up the slack of other fibers during contraction and act as bumping points for
communication between cells.
CORRECT ANSWERS
In immediate response to hemorrhage (rapid blood loss and drop in blood pressure),
baroreceptor firing will _____, causing activation of the _____, lading to effects which
include _____. - Answer- Decrease, sympathetic nervous system, constriction of
peripheral arterioles and increased heart rate
Hematocrit is the ratio of _____ to whole blood volume, and a normal value is _____ -
Answer- erythrocytes, 45%
LIKE skeletal muscle, cardiac muscle cells _____. - Answer- Are striated
What is the correct sequence of vessels, starting with the one under the HIGHEST
pressure and ending with the one under the LOWEST pressure? - Answer- Aorta,
capillary, vein, vena cava
Erythropoietin (EPO) is released from - Answer- kidneys
During this phase of the cardiac cycle, pressure inside the right ventricle increases until
it becomes equal to the pressure inside the pulmonary artery - Answer- isovolumic
contraction
An abnormal increase in the number of Red Blood Cells is called - Answer-
polycythemia
The biconcave disk structure of erythrocytes is optimized for diffusion of gases -
Answer- true
A patient with a nonfunctional SA node will be unable to contract the ventricles of their
heart - Answer- false
This question refers to EKG traces in this figure below. At what point are the atria
repolarizing? - Answer- QRS
Cardiac anastomoses - Answer- Webbing of fibers in cardiac muscles only. They pick
up the slack of other fibers during contraction and act as bumping points for
communication between cells.
