Which of the following will occur when an excitatory postsynaptic potential (EPSP) is being generated on the dendritic membrane?
A) Sodium gates will open first, then close as potassium gates open.
B) A single type of channel will open, permitting simultaneous flow of sodium and potassium.
C) Specific sodium gates will open.
D) Specific potassium gates will open.
B
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What role does a first-order neuron play in the passage of a sensory signal to the brain?
A. The first-order neuron carries the sensory signal to the thalamus. B. The first-order neuron detects the stimulus and transmits a signal to the spinal cord or brain-stem. C. The first-order neuron carries the signal to the sensory area of the cerebral cortex. D. The soma of the first-order neuron is in the cerebral cortex and the axon terminates in the spinal cord. E. The first-order neuron has no role in sensory signal transmission.
Normal development of the immune response is due in part to hormones produced by the ________
A) thyroid gland B) thymus gland C) adrenal medulla D) pancreas
What is the function of medial and lateral excursion, movements of some of the muscles of mastication?
A. To move the mandible side to side, to help grind food B. To move the mandible forward C. To open the mouth during chewing D. To close the mouth during chewing E. To move the mandible backward
The placenta is expelled from the uterus during the ________ stage of labor
A) placental B) expulsion C) dilation D) contraction E) afterbirth