Protein catabolism is an impractical source of quick energy because
A) the major byproduct is hydrogen, which cells cannot use for energy.
B) proteins are unimportant to cellular homeostasis.
C) the body cannot synthesize any of the amino acids, which it needs.
D) proteins are catabolized much too easily, resulting in homeostatic imbalance.
E) proteins are more difficult to catabolize than are complex carbohydrates or lipids.
E) proteins are more difficult to catabolize than are complex carbohydrates or lipids.
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If an excitatory neuron and an inhibitory neuron both stimulate the same postsynaptic neuron simultaneously, what can you know for sure is happening in the postsynaptic neuron?
a. it would likely reach threshold b. its permeability to cations and anions would decrease c. its resting membrane potential would increase d. it would be experiencing temporal summation e. increased permeability to cations
Pronghorn antelopes are able to run at high altitudes where oxygen is scant relative to low altitudes for long periods of time. This ability is attributed to the superabundance of mitochondria in their limb muscles. This explanation could be considered
a. mechanistic. b. evolutionary. c. both of these. d. neither of these.
List general responses to increased sympathetic activity and to parasympathetic activity
What will be an ideal response?
The main hormone of the male reproductive system is
A. luteinizing hormone. B. testosterone. C. progesterone. D. follicle-stimulating hormone.