exam 2 practice questions Flashcards
Select the following true statements:
A) Arteries take blood to the heart
B) The function of the cardiovascular system in the transport and exchange gases
C) Arteries carry oxygenated blood
D) The pulmonary circuit contains deoxygenated blood
B, C, and D
Select the following statements that are true about the heart:
A) The valve which carries oxygenated blood from the left atrium is the aortic valve
B) The valve that carries blood from the rt atrium to the left ventricle is the atrio-ventricular valve
C) The inferior and superior vena cava dump blood into the left atrium
D) The left ventricle brings deoxygenated blood to the lungs
A
Which is true about blood vessels?
A) The tunica media is made of smooth muscle
B) The tunica intima is the most external layer
C) The tunica externa is made of collagen
D) The capillaries have: tunica externa, tunica media, and tunica intima
A
Which of the following statements is/are true?
A) Capillaries have the biggest vessel diameter
B) Capillaries have the biggest surface area
C) Elastic arteries have the greatest velocity
D) Veins have the highest blood pressure
B, C
Which of the following is true about Cardiac myocytes?
A) They contain a nucleus
B) They contain intercalated discs
C) They cannot pass action potentials to another myocyte
D) Cardiac myocytes are connected by the sarcolemma
B
Select the following correct statements.
A) The SA node slows down conduction speed
B) The SA node received input from the PNS
C) The AV bundle can pass excitation
D) Bundle branches spread signal to ventricles
B
Which of the following is true about Wiggers Diagram?
a. The ‘Atrial kick’ is the last push of blood in the diastolic phase
b. When volume does not change during systole, this is called “isovolumetric contraction ”
c. When the lines intersect on the pressure diagram, this means valves are only closing
d. The sounds the heart makes are from the AV and Aortic valves closing
b, d
Calculate the Cardiac Output when: SV = 70 mL/beat HR = 60 bpm
a. 4,200 L/min
b. 4.5 /min
c. 4250 mL/min
d. 4.2 L/min
d
Select the true statement(s):
a. A decrease in Preload increase SV and decreases CO
b. An increase in Afterload increases CO and SV
c. An increase in contractility increases EDV
d. The ejection fraction range is: 55-75%
d
Positive Chronotropic factors consist of:
a. A decrease in SNS input
b. An increase in SNS input
c. An increase in contractility
d. A decrease in contractility
b
Negative Inotropic factors consist of:
a. A decrease in contractility
b. A decrease of SNS input to the myocardium
c. An increase of SNS input to the myocardium
d. An increase of contractility
a, b
Based on Poiseuille’s Law, which of the following is/are true?
a. If radius increases, flow increases
b. If the length increases, flow increases
c. If viscosity increases, flow decreases
d. If pressure decrease, flow increases
None! Poiseuille’s law has nothing to do with flow, but with resistance!
Which of the following increase venous return?
a. Skeletal muscle pumps
b. Decrease in CO
c. A decrease in TPR
d. An increase in blood volume
a, c, d
In the Cardiac Function Curve:
a. RAP is proportional to EDV
b. As we increase RAP, we increase Cardiac output
c. As we increase stretch, we increase contraction
d. As we increase Central Venous pressure, we increase venous return
a, b, c, d
Which of the following is/are true about fast neural mechanism?
a. The baroreceptors detect the amount of tension pushing on the carotid artery
b. If there is low blood pressure, the baroreceptors send a signal to increase PNS input
c. If there an increase in SNS input, there is an increase in contractility
d. If there is an increase of PNS, this means it is a positive chronotropic factor
c
