NEW
Font size
WorksheetsChapter 34 Quiz 2
Total questions: 8
Worksheet time: 4mins
The (a)_______________ acts as the pacemaker of the heart. It initiates the heartbeat by generating electrical impulses. The electrical impulses pass to the (b)_______________ which relays the impulses to the ventricles along the septum.
(a) AV node；(b) SA node
(a) SA node；(b) AV node
During the stage of (c)_______________, the closure of (d)_______________ produce the first heart sound.
(c) atrial systole；(d) semilunar valves
(c) atrial systole；(d) tricuspid and bicuspid valves
(c) ventricular systole；(d) semilunar valves
(c) ventricular systole；(d) tricuspid and bicuspid valves
When more nerve impulses are sent through the_______________ to the SA node, the cardiac output is decreased.
sympathetic nerve
vagus nerve
During exercise, the adrenal glands are stimulated by the (e)_______________ to secrete (f)_______________ adrenaline into the blood.
(e) sympathetic nerve；(f) more
(e) sympathetic nerve；(f) less
(e) vagus nerve；(f) more
(e) vagus nerve；(f) less
During exercise, more nerve impulses are sent through the vagus nerve to the respiratory muscles.
True
False
During vigorous exercise, skeletal muscle cells carry out both aerobic respiration and anaerobic respiration.
True
False
After exercise, our ventilation rate returns to normal immediately.
True
False
After exercise, extra oxygen is needed to metabolize the lactic acids accumulated in the skeletal muscle cells.
True
False
