EPSPs (excitatory postsynaptic potentials) occur when
A) more potassium ions than usual leak out of a cell.
B) more calcium ions than usual leak out of a cell.
C) chloride ions enter a cell.
D) extra sodium ions enter a cell.
E) hyperpolarizations occur.
D
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For convenience, gestation is usually divided into three integrated ________.
Fill in the blank(s) with the appropriate word(s).
The refractive structure of the eye that has the ability to change its strength is the ____________________
Fill in the blank(s) with correct word
Progesterone levels are highest during the ________ phase.
A. proliferative B. luteal C. menstrual D. follicular E. ovulation
Which of the following is not a reason that somatic reflexes act faster than visceral reflexes?
A) Some of the neurons in the effector pathway in the visceral reflex arc are unmyelinated. B) The effector pathway in the visceral reflex arc involves more chemical synapses. C) The effector pathway in the somatic reflex arc is myelinated. D) The effector organs in the somatic reflex are closer to the spinal cord. E) The effector pathway in the visceral reflex arc involves more neurons.