When a second excitatory postsynaptic potential (EPSP) arrives at a single synapse before the effects of the first have disappeared, what results?
A) inhibition of the impulse B) spatial summation
C) temporal summation D) hyperpolarization
Answer: C
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Cysts on the kidney can press upon nephrons, raising the pressure inside the nephrons. How will this affect glomerular filtration rate and blood pressure?
A) GFR increases and blood pressure increases B) GFR decreases and blood pressure increases C) GFR increases and blood pressure decreases D) GFR decreases and blood pressure decreases
Primary lymphatic organs include the ________.
A. tonsils and spleen B. red bone marrow and lymph nodes C. thymus and lymph nodes D. red bone marrow and thymus
Due to the pattern of innervation of skeletal muscle, one would expect that
A. there are fewer motor neurons than skeletal muscle fibers. B. the number of muscle fibers and motor neurons is equal. C. there are fewer muscle fibers than motor neurons.
What passes through the intervertebral foramina?
A. Spinal nerve B. Spinal cord C. Intervertebral disk