The atrioventricular valves are closed when ________
A) atrial pressure is greater than ventricular pressure
B) the atria contract
C) the ventricles fill with blood
D) atrial pressure is less than ventricular pressure
E) atrial systole occurs
D
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The movement of the forearm while twisting a doorknob is
A) protraction and retraction. B) abduction and adduction. C) flexion and extension. D) lateral rotation and medial rotation. E) supination and pronation.
Which of the following are considered an "essential" nutrient?
a. All amino acids b. glucose molecules c. fatty acids d. certain vitamins e. hormones
Which of the following is not a function of parathyroid hormone (PTH)?
A. Inhibit osteoblast activity B. Promote calcium reabsorption by the kidneys C. Promote calcitriol synthesis D. Stimulate osteoclast activity E. Lower blood calcium
List the types of muscle tissue.
A. Tendon B. Skeletal C. Cartilaginous D. Smooth E. Cardiac