Download Question 2 of 27Points: 10

What happens when ventricular pressure falls below atrial pressure?
The ventricles eject blood.
The atrioventricular valves open.
The semilunar valves close.
The semilunar valves open.
Question 2 of 27Points: 10
Stroke volume is:
The amount of blood in the ventricle at the end of filling.
The amount of blood in the ventricle at the beginning of filling.
The amount of blood that flows from the ventricle during contraction.
The amount of blood that flows into the ventricle during filling.
Question 3 of 27Points: 10
In the image above representing the cardiac cycle, label A represents
Atrial and ventricular diastole
Atrial systole
Ventricular systole
Ventricular ejection
Question 4 of 27Points: 10
Ventricular ejection is indicated by which label in the image of the cardiac
cycle above?
A
B
C
D
Question 5 of 27Points: 10
Referring to the image of the cardiac cycle above, in order to move from B to
C, which of the following must be true?
Atrial pressure becomes greater than ventricular pressure
Ventricular pressure becomes higher than atrial pressure
Ventricular pressure becomes higher than aortic pressure
Aortic pressure becomes higher than ventricular pressure
Question 6 of 27Points: 10
Referring to the image of the cardiac cycle above, the point at which
ventricular pressure falls below aortic pressure occurs between which two
steps?
A and B
B and C
C and D
D and A
Question 7 of 27Points: 10
Automaticity of the heart refers to its ability to:
Generate its own pace of beating.
Initiate its own contractions.
Respond to autonomic reflexes
Increase its rate during exercise.
Question 8 of 27Points: 10
While the electrical signal is passing through the cells of the AV node:
The atria are relaxed.
The atria are contracting.
The ventricles are contracting.
The atria and ventricles are contracting.
Question 9 of 27Points: 10
Pressure in the venules is:
Lower than the pressure in the capillaries.
Lower than the pressure in the veins.
Higher than the pressure in the arterioles.
The same as the diastolic pressure in the right atrium.
Question 10 of 27Points: 10
If you have your blood pressure measured at the doctor’s office as 110 over
70, this means that:
Your mean pressure is 90.
Your pulse pressure is 40.
Your diastolic pressure is 110 and your systolic pressure is 70.
Your heart rate is between 70 and 110.
Question 11 of 27Points: 10
Choose the statement that best describes cardiac output.
The amount of blood, in mL, ejected from the heart with each systole.
The amount of blood, in L/min that leaves the left ventricle each minute.
The value of the systolic pressure - diastolic pressure.
The pressure the heart generates during contraction.
Question 12 of 27Points: 10
Refer to the graph above. How does the pressure at the distal end of the
arterioles compare with that at the proximal end of the arterioles?
It is approximately 45 mmHg more.
It is approximately 45 mmHg less.
It is approximately 10 mmHg less.
It is approximately 10 mmHg more.
Question 13 of 27Points: 10
In the graph above, label 3 is:
Systolic pressure.
Diastolic pressure.
Mean pressure.
Atrial pressure.
Question 14 of 27Points: 10
Which structure(s) of the heart is/are most responsible for maintaining the one
way flow of blood through the heart?
Endocardial surfaces.
Heart valves.
Myocardium.
Papillary muscles.
Question 15 of 27Points: 10
The heart helps maintain flow through the circulation by _________.
increasing the pressure of the blood as it moves out of the heart
generating a negative pressure that pulls blood out of the veins
generating a pulse pressure that carries enough energy to propel the blood
through the blood vessels
preventing too much blood from accumulating in the heart, thereby keeping
more of it in the circulation
Question 16 of 27Points: 10
Preload would best be describe as:
End-diastolic volume
End-systolic volume
Stroke volume
Cardiac output
Question 17 of 27Points: 10
A change in contractility represents:
A change in preload.
A change in blood pressure.
A change in heart rate.
A change in stroke volume.
Question 18 of 27Points: 10
If arterioles constrict, blood pressure ________________.
decreases
increases
does not change
changes, but not in a predictable condition
Question 19 of 27Points: 10
If vascular resistance stays the same, how do decreases in cardiac output
affect blood pressure?
Blood pressure increases
Blood pressure decreases
Blood pressure does not change
Blood pressure may change, but the change is unpredicable
Question 20 of 27Points: 10
Which of the following statements is true regarding the transport of oxygen
and carbon dioxide on hemoglobin?
Nearly all oxygen and carbon dioxide are transported on hemoglobin.
Nearly all oxygen is transported bound to hemoglobin, but only a small
fraction of carbon dioxide is transported this way.
Most carbon dioxide is transported bound to hemoglobin, but only a small
fraction of oxygen is.
Less than 50% of both oxygen and carbon dioxide is transported bound to
hemoglobin.
Question 21 of 27Points: 10
Training at altitude can benefit aerobic athletes because:
Their cells become better at using oxygen.
Their hemoglobin binds oxygen more easily.
They increase their hemoglobin levels.
They learn to breathe better.
Question 22 of 27Points: 10
Which of the following vessels are likely to change their resistance the most?
Arteries
Arterioles
Capillaries
Veins
Question 23 of 27Points: 10
The main role of venules is to:
Deliver blood into capillaries.
Collect blood from a single capillary.
Collect blood from many capillaries.
Exchange nutrients.
Question 24 of 27Points: 10
What are the most numerous cells in blood?
Leukocytes
Erythrocytes
Thrombocytes
Plasmacytes
Question 25 of 27Points: 10
Which of the following is not properly matched with its function?
Red blood cells: Oxygen transport
White blood cells: Immune function
Platelets: Carbon dioxide transport
Endothelial cells: Line blood vessels
Question 26 of 27Points: 10
The main component of plasma is/are
red blood cells
water
sodium
albumin
Question 27 of 27Points: 10
Which of the following plasma components is not correctly matched with its
function?
Albumin: Helps retain water in the vascular compartment
Fibrinogen: Binds oxygen for transport
Globulins: Contribute to immune function.
Electrolytes: Maintain osmotic pressure with cells.