The infundibulum is a ________
A) projection of the hypothalamus from which the pituitary gland hangs
B) bulky nucleus composed of the paraventricular nucleus and the supraoptic nucleus
C) portal system between the hypothalamus and the pituitary gland
D) mass of endocrine and neural cells
E) depression of the sphenoid bone that protects the pituitary gland
A
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Bone cells called __________ break down bone by secreting hydrochloric acid and enzymes that dissolve the matrix
A. osteoprogenitor cells B. osteoid cells C. osteocytes D. osteoclasts E. osteoblasts
Which statement about membrane proteins is incorrect?
a. Channels are water-filled pathways. b. Channels are not highly selective. c. Carriers are highly selective. d. CAMs serve as binding sites for specific ions. e. Proteins may work in conjunction with carbohydrates to provide recognition of "self."
The term excitation–contraction coupling refers to the series of events linking signals from the brain to the spinal cord
Indicate whether the statement is true or false
The force (effort) is in the middle of a ________-class lever.
Fill in the blank(s) with the appropriate word(s).