From a physiological perspective, the increase in pelage (i.e. fur) that some mammals experience in winter represents
a. acclimation.
b. acclimatization.
c. adaptation.
d. feedback inhibition.
b
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In humans, separation of the cells at the two-cell state following fertilization may lead to the production of twins, which in this case would be ________
A) genetically identical B) fraternal C) dizygotic D) potentially of different sexes
Red bone marrow is found in greatest amounts in the:
a. sternum and hipbone b. clavicle and vertebrae c. femur and tibia d. humerus and ulna
The type of brain waves observed in an individual who is awake but in a quiet resting state with eyes closed are _____ waves
A. alpha B. beta C. delta D. theta E. gamma
Which of the following statements regarding action potentials generated in a neuronal membrane is FALSE?
A. An action potential generated by a threshold stimulus is the same size as one generated by a supra-threshold stimulus. B. An action potential generates a new action potential in an adjacent area of membrane. C. An action potential generates a local current that depolarizes adjacent membrane to threshold potential. D. Action potentials are usually initiated at the axon hillock of a neuron. E. Action potentials travel in both directions along the axon.