Which of the following is true about smooth muscle?
A) The resting membrane potential is usually less negative than in skeletal muscle.
B) It responds in an "all or none" fashion.
C) It does not respond to hormones.
D) It has a faster speed of contraction than skeletal muscle.
Answer: A) The resting membrane potential is usually less negative than in skeletal muscle.
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What gives bone its flexibility?
A. Inorganic salts B. Yellow bone marrow C. Collagen fibers D. Trabeculae E. Elastic fibers
The reduction of friction between the parietal and visceral surfaces of an internal cavity is the function of
A) cutaneous membranes. B) mucous membranes. C) serous membranes. D) synovial membranes. E) the lamina propria.
The ________ is the kidney's sole blood supply
A) adrenal artery B) renal artery C) superior mesenteric artery D) celiac artery E) common iliac artery
The sodium-potassium pump moves both potassium and sodium down their concentration gradients, from higher to lower concentration.
Answer the following statement true (T) or false (F)