____________________, a neurotransmitter unique to pain fibers, is released from afferent pain terminals
Fill in the blank(s) with correct word
Substance P
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The sensor-receptive cells in the retina that function best in dim light and enable night vision are the ________
A) Rods B) Pupil C) Iris D) Cones
Which of the following statements is true of connective tissue?
A) Elastin fibers are sometimes called white fibers. B) When connective tissue is stretched, collagen gives it the ability to snap back. C) Collagen fibers provide high tensile strength. D) Reticular fibers form thick, ropelike structures.
The velocity of blood flow in capillaries
a. is greater than that for arterioles. b. is greater than that for veins. c. is slow enough to favor adequate exchange. d. both (a) and (b) above. e. both (a) and (c) above.
Osteogenesis imperfecta can be caused by abnormally formed ________.
A. proteoglycans B. hydroxyapatite C. calcium D. osteoblasts E. collagen