On a field trip you discover a skeleton with the following characteristics: the acetabulum is directed laterally, the ischial spine points medially, and the angle inferior to the pubic symphysis is less than 90 degrees. The long bones of the arms and legs are relatively light and show epiphyseal plates. This skeleton is probably from
A) a young male.
B) a young female.
C) an elderly male.
D) an elderly female.
E) an infant male.
A
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Which type of chemical reaction breaks larger reactants into smaller products?
a) synthesis b) decomposition c) potential d) exchange e) activated
Describe the difference between the nonpregnant uterus and one shortly prior to the birth of a baby
What will be an ideal response?
The T tubules
a. store Ca2+ b. provide a means of rapidly transmitting the action potential from the surface into the central portions of the muscle fiber c. store ATP d. run longitudinally between the myofibrils e. have expanded lateral sacs
If the extracellular fluid around a neuron is replaced with an isotonic saline solution that contains K+ and other solutes at concentrations very close to the extracellular fluid concentrations of a normal cell, the result is
A. hyperpolarized membrane. B. no resting membrane potential. C. a resting membrane potential close to its normal value. D. depolarized membrane. E. None of the choices are correct.