A postsynaptic neuron has three presynaptic inputs - from neurons X, Y, and Z. When X and Y are stimulated simultaneously and repeatedly, the postsynaptic neuron reaches threshold and undergoes an action potential
When X and Z are stimulated simultaneously, however, there is no change in the membrane potential of the postsynaptic neuron. The simultaneous stimulation of X and Y is an example of
A. temporal summation.
B. presynaptic inhibition.
C. spatial summation.
D. neuronal divergence.
E. presynaptic facilitation.
C
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Arteries have thinner walls than veins.
Answer the following statement true (T) or false (F)
An incoming pathway for subconscious information derived from the internal viscera is called a(n) ____________________, whereas an incoming pathway for information propagated to the conscious levels of the brain is called a(n) ____________________
Fill in the blank(s) with correct word
During bone repair, how long does the stage of the bony callus last?
A. 1 to 2 weeks B. 8 to 10 days C. 12 to 24 hours D. 3 to 4 months E. 1 to 2 years
Urea and mannitol are examples of which of the following types of diuretics?
A. osmotic diuretics B. thiazide diuretics C. potassium-sparing diuretics D. carbonic anhydrase inhibitors E. ADH inhibitors