B cells provide this kind of immunity
A) humoral B) cellular C) clonal D) antigenic
Answer: A
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Which of the following factors increases insulin but not glucagon secretion?
a. Increased blood glucose levels b. Increased amino acids (especially during a protein-rich meal) c. An anticipatory response mediated through an increase in vagal activity and gastrointestinal hormones d. Both a and c e. Both b and c
Which may occur as a result of muscle atrophy?
A. Fibers waste away and die B. Muscle loses tone C. Reduction in muscle size D. Fibers become weaker E. All of the choices are correct.
What do fibroblasts contribute to bone repair?
A) Fibroblasts form new collagen fibers to bridge the gap between bone fragments. B) Fibroblasts secrete hyaline cartilage to form a soft callus. C) Fibroblasts direct the transition from primary bone to secondary bone. D) Fibroblasts form the hematoma that involves a mass of blood cells.
In the human eye, most refraction occurs when light passes through the
A) iris. B) cornea. C) lens. D) aqueous humor. E) vitreous humor.