OSSF 2 Exam Questions And Correct Answers
(Verified Answers)
What aspect of the cardiovascular system does the kidney control? - CORRECT ANSWER -
Blood volume
What is the purpose of the valves in both the heart and veins? - CORRECT ANSWER -
Unidirectional flow
What circulation does the right side of the heart pump to? - CORRECT ANSWER -Pulmonary
What circulation does the left side of the heart pump to? - CORRECT ANSWER -Systemic
Where are the exceptions to the '1 set of capillaries' rule? - CORRECT ANSWER -Liver, kidney,
anterior pituitary
As cross-sectional area of blood vessels increases, velocity ____ - CORRECT ANSWER -
decreases
Arteries have more of what fibers compared to arterioles? - CORRECT ANSWER -Elastic
Arterioles have more _____ than arteries - CORRECT ANSWER -Smooth muscle
What blood vessels serve as the major site of regulation in the cardiovascular system? -
CORRECT ANSWER -Arterioles
What are the two important shunts in the fetus? - CORRECT ANSWER -Foramen ovale, ductus
arteriosus
,Where does the foramen ovale direct blood? - CORRECT ANSWER -From the R atrium to the L
atrium
Where does the ductus arteriosus direct blood? - CORRECT ANSWER -From the pulmonary
artery to the aorta
how does blood get to the fetus? - CORRECT ANSWER -Umbilical vein
Do blood vessels in the fetus supply the liver? - CORRECT ANSWER -No
True/false: in the coronary circulation, each cardiac myocyte has a single corresponding capillary
- CORRECT ANSWER -False: each myocyte has several capillaries
Where do the coronary veins drain into? - CORRECT ANSWER -Coronary sinus
Why does the coronary blood flow decrease during systole? - CORRECT ANSWER -Coronary
arteries are compressed
True/false: coronary perfusion increases during exercise - CORRECT ANSWER -False: when
HR increases, length of diastole decreases, decreasing coronary perfusion
What is the function of endocardium? - CORRECT ANSWER -Impulse conduction
What is the function of myocardium? - CORRECT ANSWER -Contraction
What is the function of epicardium? - CORRECT ANSWER -Homeostasis
, What are the components of pericardium? - CORRECT ANSWER -Fibrous tissue, adipose,
mesothelium
What part of the heart valves are vascular? - CORRECT ANSWER -Base
What is the structure of the heart valves? - CORRECT ANSWER -Connective tissue sandwich
surrounded by endothelium
What is the name of the fibrous rings that are where the valve leaflets originate? - CORRECT
ANSWER -Annuli fibrosi
What is the name of the structures that join the annuli fibrosi? - CORRECT ANSWER -Trigona
fibrosa
What is the name of the separation between the ventricles and atria? - CORRECT ANSWER -
Membranous septum
True/false: the heart needs a stimulus in order to beat - CORRECT ANSWER -False
What kind of cells make up the SA node? - CORRECT ANSWER -Modified cardiac myocytes
How are the cells of the SA node different from cardiac myocytes? - CORRECT ANSWER -Few
myofibers, no intercalated discs
What are the characteristics of the purkinje fibers? - CORRECT ANSWER -Few myofilaments,
lots of glycogen, conducts impulses much faster than muscle cells
What are the layers of vessels, from outside to inside? - CORRECT ANSWER -Tunica
adventitia, tunica media, tunica intima
(Verified Answers)
What aspect of the cardiovascular system does the kidney control? - CORRECT ANSWER -
Blood volume
What is the purpose of the valves in both the heart and veins? - CORRECT ANSWER -
Unidirectional flow
What circulation does the right side of the heart pump to? - CORRECT ANSWER -Pulmonary
What circulation does the left side of the heart pump to? - CORRECT ANSWER -Systemic
Where are the exceptions to the '1 set of capillaries' rule? - CORRECT ANSWER -Liver, kidney,
anterior pituitary
As cross-sectional area of blood vessels increases, velocity ____ - CORRECT ANSWER -
decreases
Arteries have more of what fibers compared to arterioles? - CORRECT ANSWER -Elastic
Arterioles have more _____ than arteries - CORRECT ANSWER -Smooth muscle
What blood vessels serve as the major site of regulation in the cardiovascular system? -
CORRECT ANSWER -Arterioles
What are the two important shunts in the fetus? - CORRECT ANSWER -Foramen ovale, ductus
arteriosus
,Where does the foramen ovale direct blood? - CORRECT ANSWER -From the R atrium to the L
atrium
Where does the ductus arteriosus direct blood? - CORRECT ANSWER -From the pulmonary
artery to the aorta
how does blood get to the fetus? - CORRECT ANSWER -Umbilical vein
Do blood vessels in the fetus supply the liver? - CORRECT ANSWER -No
True/false: in the coronary circulation, each cardiac myocyte has a single corresponding capillary
- CORRECT ANSWER -False: each myocyte has several capillaries
Where do the coronary veins drain into? - CORRECT ANSWER -Coronary sinus
Why does the coronary blood flow decrease during systole? - CORRECT ANSWER -Coronary
arteries are compressed
True/false: coronary perfusion increases during exercise - CORRECT ANSWER -False: when
HR increases, length of diastole decreases, decreasing coronary perfusion
What is the function of endocardium? - CORRECT ANSWER -Impulse conduction
What is the function of myocardium? - CORRECT ANSWER -Contraction
What is the function of epicardium? - CORRECT ANSWER -Homeostasis
, What are the components of pericardium? - CORRECT ANSWER -Fibrous tissue, adipose,
mesothelium
What part of the heart valves are vascular? - CORRECT ANSWER -Base
What is the structure of the heart valves? - CORRECT ANSWER -Connective tissue sandwich
surrounded by endothelium
What is the name of the fibrous rings that are where the valve leaflets originate? - CORRECT
ANSWER -Annuli fibrosi
What is the name of the structures that join the annuli fibrosi? - CORRECT ANSWER -Trigona
fibrosa
What is the name of the separation between the ventricles and atria? - CORRECT ANSWER -
Membranous septum
True/false: the heart needs a stimulus in order to beat - CORRECT ANSWER -False
What kind of cells make up the SA node? - CORRECT ANSWER -Modified cardiac myocytes
How are the cells of the SA node different from cardiac myocytes? - CORRECT ANSWER -Few
myofibers, no intercalated discs
What are the characteristics of the purkinje fibers? - CORRECT ANSWER -Few myofilaments,
lots of glycogen, conducts impulses much faster than muscle cells
What are the layers of vessels, from outside to inside? - CORRECT ANSWER -Tunica
adventitia, tunica media, tunica intima
