The site in the neuron where EPSPs and IPSPs are integrated is the
A) chemical synapse.
B) electrical synapse.
C) axon hillock.
D) dendritic membrane.
E) synaptic terminal.
C
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When are the three primary germ layers established during pregnancy?
a) First week of development b) Second week of development c) Third week of development d) Fourth week of development e) Second month of development
Compounds that diffuse passively across the blood-brain barrier
A) are lipid soluble. B) do so in proportions equal to their presence in the bloodstream. C) are water soluble. D) move equally freely in both directions. E) None of the answers are correct.
The portion of the stomach that is superior to the junction between the stomach and the esophagus is the
A) cardia. B) pylorus. C) fundus. D) antrum. E) body.
Which statement represents the correct order of the reflex arc for micturition?
A. The reflex arc begins with stretch receptors in the urinary bladder's walls - parasympathetic neurons go from the spinal cord to the detrusor muscle - stretch receptors send signals to the sacral region of the spinal cord - the detrusor muscle contracts the internal urethral sphincter relaxes - urine is passed. B. The reflex arc begins with stretch receptors in the urinary bladder's walls - stretch receptors send signals to the sacral region of the spinal cord - the detrusor muscle contracts the internal urethral sphincter relaxes - parasympathetic neurons go from the spinal cord to the detrusor muscle - urine is passed. C. The reflex arc begins with stretch receptors in the urinary bladder's walls - stretch receptors send signals to the sacral region of the spinal cord - parasympathetic neurons go from the spinal cord to the detrusor muscle - the detrusor muscle contracts the internal urethral sphincter relaxes - urine is passed. D. The reflex arc begins with stretch receptors sending signals to the sacral region of the spinal cord - stretch receptors receive signals in the urinary bladder's walls - the detrusor muscle contracts the internal urethral sphincter relaxes - parasympathetic neurons go from the spinal cord to the detrusor muscle - urine is passed.