Which of the following statements is true of nerves?
A) They are composed of groups of neurons.
B) Neurons are composed of groups of nerves.
C) They act as pipes in the body, transporting fluid.
D) Signals generated in nerves can travel only short distances.
Answer: A
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Which hormone tends to increase the amount of urine produced?
A. Antidiuretic hormone B. Aldosterone C. Atrial natriuretic hormone D. Angiotensin-converting enzyme
The supraspinatus is named for its location on the posterior aspect of the scapula above the spine. What is its action?
A) to flex and adduct the humerus and to act as a synergist of the pectoralis major B) to initiate abduction of the arm, to stabilize the shoulder joint and to help prevent downward dislocation of the humerus C) to extend and medially rotate the humerus and to act as a synergist of the latissimus dorsi D) to help hold the head of the humerus in the glenoid cavity and rotate the humerus laterally
Which of the following tubes has both reproductive and urinary functions?
A) ejaculatory duct B) epididymis C) ductus deferens D) urethra
T helper cells possess a glycoprotein called CD4. This molecule binds to
A. MHC class I molecules. B. MHC class II molecules. C. MHC-CD8 antigens. D. MHC-CD28 antigens. E. Interleukin-1 receptor.