Which best describes the specific cause of Parkinson disease?
A. enhanced sensitivity of cholinergic receptors to acetylcholine
B. reduced ability of neurons in the substantia nigra to release dopamine
C. failure of serotonin receptors to bind with these neurohormones
D. hyperactivity of metabolic enzymes that degrade dopamine
E. natural tendency of basal nuclei to follow a daily recurring, oscillating cycle of rising and falling norepinephrine release
B
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The function of the muscularis of the GI tract wall is to both propel and mix the contents of the tract.
Answer the following statement true (T) or false (F)
Which statement is TRUE regarding antidiuretic hormone (ADH)?
A) ADH increases the permeability of the late distal tubule and cortical collecting ducts to water. B) ADH promotes water loss and increases urine output. C) ADH is secreted in response to low potassium ions in the blood. D) ADH causes the kidneys to produce very dilute urine.
Mr. Smith hypoventilates and retains too much carbon dioxide. Which of the following receptors is stimulated by an increase in carbon dioxide?
A. irritant receptors B. pressure receptors C. osmoreceptors D. peripheral chemoreceptors E. baroreceptors
What does structure "C" represent on the diagram?
A. tendon B. articular cartilage C. bursa D. fibrous capsule E. synovial membrane