This portion of the brain forms part of the roof of the diencephalon and covers the third ventricle. Its posterior portion houses the pineal gland and the habenular nuclei
A. Epithalamus
B. Thalamus
C. Hypothalamus
D. Cerebellum
E. Infundibulum
A
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The function of the biceps femoris is to
A. flex the hip and ankle. B. extend the thigh and flex the leg. C. flex the thigh and extend the leg. D. flex the thigh (with no action at the leg). E. adduct the thigh and extend the knee.
How can we determine whether an animal was herbivorous? Propose a hypothesis to explain why herbivory is limited to amniotes and their closest relatives
What will be an ideal response?
How does the renal countercurrent multiplier mechanism allow the creation of a concentrated urine?
A. It transports NaCl from the medullary interstitium into the collecting duct, which directly increases the osmolarity of the urine. B. It transports urea from the medullary interstitium into the collecting duct, which directly increases the osmolarity of the urine. C. By concentrating NaCl in the renal medullary interstitium, it allows water to be reabsorbed from the collecting ducts when vasopressin is present. D. By pumping NaCl and urea into the ascending limb of the loop of Henle, it raises the solute load, which turns into a concentrated urine once water is extracted from the collecting duct. E. When anti-diuretic hormone is present, it stimulates the pumping of NaCl from the medullary interstitium and water follows, concentrating the urine.
The “pacemaker” for the heart is usually the:
a. sinoatrial node b. Purkinje fibers c. bundle of His d. atrioventricular bundle