Describe the structure of an antibody
What will be an ideal response?
An antibody molecule consists of two parallel pairs of polypeptide chains: a pair of long, heavy chains and a pair of short, light chains. Each chain contains both constant segments and variable segments. The constant segments of the heavy chains form the base of the antibody molecule; the free tips of each of the two variable segments form the antigen-binding sites.
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The secretions of the adrenal medulla act to supplement the effects of ________.
A) parasympathetic innervation B) sympathetic stimulation C) vagus nerve activity D) neurosecretory substances
Which of the following organelles is not involved in protein synthesis?
A. Smooth ER B. Ribosomes C. The Golgi complex D. Rough ER E. The nucleus
Which of the following muscles is NOT a flexor of the elbow?
A. Brachialis B. Biceps brachii C. Brachioradialis D. Triceps brachii E. All of these are flexors of the elbow.
Which of the following is true regarding red blood cells?
A) They are anucleate. B) They survive for approximately one year. C) They have a biconvex shape. D) They are produced in the spleen. E) They primarily carry carbon dioxide.