What protein are bone matrix fibers are composed of?
A. Collagen
B. Elastin
C. Keratin
D. Fibrin
E. Osteon
A. Collagen
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The ends of long bones are known as the ________.
A. medulla B. periosteum C. diaphysis D. epiphyses
You (a healthy individual) are swimming underwater when you can no longer resist the urge to breathe. This overwhelming urge is probably due to
A. the increase in pH has made your blood dangerously alkaline. B. the autorhymthic cells in your diaphragm contracting. C. the decrease in O2 available to the cells of the body. D. the increase in plasma H+.
Changes in the central nervous system that accompany aging include all of the following except
A) reduction in brain size and weight. B) decrease in the number of neurons. C) decreased blood flow to the brain. D) changes in synaptic organization in the brain. E) increased memory storage.
Which does not have a mesentery?
a. sigmoid colon b. seminal gland c. appendix d. uterus