Which vessel of the heart receives blood during right ventricular systole?
A) pulmonary trunk
B) vena cava
C) aorta
D) pulmonary veins
A
Explanation:
B) The vena cava empties blood into the right atrium.
C) The aorta receives blood during left ventricular systole.
D) The pulmonary veins empty blood into the left atrium.
Exercise 37: Post-Lab Questions
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The long plateau phase of the cardiac muscle action potential is due to
A) movement of fewer sodium ions across the cell membrane. B) calcium channels remaining open. C) increased membrane permeability to potassium ion. D) decrease in the amount of calcium diffusing across the membrane. E) increased membrane permeability to sodium ions.
The nerve labeled A in the diagram arises from which plexus?
a) cervical plexus b) brachial plexus c) lumbar plexus d) sacral plexus e) coccygeal plexus
Amniotic fluid is similar in composition to ICF
Indicate whether the statement is true or false
Cardiac muscles are always dependent on aerobic metabolism?
a. true b. false