Which structure connects the yolk sac to the embryonic midgut?
A. Vitelline duct
B. Gastric duct
C. Hepatopancreatic ampulla
D. Liver bud
E. Foregut dilation
Answer: A
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Which of these functions is not associated with the reticular formation?
A. Cardiovascular control B. Habituation C. Pain modulation D. Sleep E. Hunger
When blood volume becomes abnormally low all of the following occur except:
a. sodium reabsorption is increased b. concentrated urine is formed c. renin release is increased d. aldosterone is secreted by the kidney. e. vasopressin levels rise
Damage to the hair cells of the spiral organ (organ of Corti) can result in a loss of:
A) equilibrium. B) vision. C) olfaction. D) hearing.
A woman with Rh- blood does not have anti-Rh antibodies in her blood unless ________.
A. she has had a previous blood transfusion B. Rh+ erythrocytes have previously been introduced into her blood C. her husband is Rh+ D. she has had an Rh+ child