The process in which lymphocytes that recognize self-antigens are prevented from being activated is ________.
A. clonal selection
B. clonal anergy
C. clonal deletion
D. apoptosis
Answer: B
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What protein are bone matrix fibers are composed of?
A. Collagen B. Elastin C. Keratin D. Fibrin E. Osteon
The type of bone tissue that is replaced more frequently is ________ bone; the part of the femur that is replaced more frequently is the ________.
A. spongy; distal epiphysis B. compact; distal epiphysis C. spongy; diaphysis D. compact; diaphysis
If you remove the posterior lobe of the pituitary gland from an experimental animal, large volumes of urine are produced because:
a. The hypothalamus has been damaged b. Blood flow to the kidneys increases c. You have removed the source of ADH release d. SNS activity increases
If the adrenal glands were removed from a patient, his plasma cortisol levels would ________, secretion of CRH by the ________ would ________, and secretion of ACTH by the ________ would ________.
A. decrease; adenohypophysis; increase; anterior pituitary gland; increase B. decrease; hypothalamus; increase; adenohypophysis; increase C. decrease; anterior pituitary gland; increase; hypothalamus; increase D. increase; hypothalamus; decrease; anterior pituitary gland; decrease E. increase; hypothalamus; increase; adenohypophysis; increase