Integrated Human Sciences | 100% Correct
Questions & Answers - Galen
During ventricular contraction, the AV valves close to:
A. speed up the action potential as it moves through the conduction system.
B. prevent the backflow of blood from the ventricles to the atria.
C. enhance drainage of the coronary veins.
D. push blood into the venae cava.
B. prevent the backflow of blood from the ventricles to the atria.
The purpose of the left heart is to
A. receive oxygenated blood and pump it to all organs of the body.
B. pump blood into the pulmonary artery.
C. pump blood to the lungs for oxygenation.
D. receive blood from the venae cava.
A. receive oxygenated blood and pump it to all organs of the body.
Which step is next in the pathway of blood flow through the heart? Pulmonary trunk to
pulmonary arteries to pulmonary capillaries to pulmonary veins to:
A. pulmonic semilunar valve.
B. left atrium.
C. right atrium.
D. aorta.
,B. left atrium.
The pacemaker of the heart is the
A. SA node.
B. AV node.
C. bundle of His.
D. Purkinje fibers.
A. SA node.
Cardiac impulse slows as it moves through the AV node into the bundle of His. The slowing
down allows
A. time for the ventricles to fill during the atrial contraction.
B. blood pressure to be maintained.
C. the flow of blood to slow to an acceptable rate.
D. automaticity and rhythmicity to occur.
A. time for the ventricles to fill during the atrial contraction.
During ventricular systole:
A. the atria contract and pump blood into the ventricles.
B. the AV valves are open and the ventricles are relaxed.
C. the ventricles contract and eject blood.
D. the semilunar valves remain closed.
C. the ventricles contract and eject blood.
, Which of the following is a consequence of sympathetic nerve stimulation?
A. Increased myocardial force of contraction
B. Peripheral vasodilation
C. Decreased heart rate
D. All of the above
A. Increased myocardial force of contraction
Spongy bone
A. has a microscopic structure unit known as the haversian system.
B. is found primarily in the shafts of long bones and the outer surfaces of bones.
C. can be found in the epiphyses of long bones.
D. is composed of tightly packed cells and provides the strength for bones.
C. can be found in the epiphyses of long bones.
The axial skeleton
A includes bones of the
cranium.
B. includes the pelvic girdle
C. has more bones than the appendicular skeleton.
D. is where you would find epiphyseal discs
A includes bones of the
cranium.