The hepatic portal vein ________.
A) is actually an artery
B) carries nutrient-rich blood to the liver
C) carries oxygen-rich blood from the liver to the viscera
D) carries blood from the liver to the inferior vena cava
B) carries nutrient-rich blood to the liver
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Matching
A) Aortic semilunar valve B) Mitral (bicuspid) valve C) Tricuspid valve D) Pulmonary semilunar valve 22) Prevents backflow into the left ventricle. 23) Prevents backflow into the right atrium. 24) Prevents backflow into the left atrium. 25) Prevents backflow into the right ventricle. 26) Atrioventricular (AV) valve with two flaps. 27) Atrioventricular (AV) valve with three flaps.
After consuming a carbohydrate rich meal, insulin is released by the pancreas to lower serum glucose levels. when serum glucose levels have returned to normal the secretion of insulin is inhibited. this is an example of which feedback mechanism?
a) positive feedback inhibition b) neutral feedback inhibition c) negative feedback inhibition d) parallel after discharge inhibition
The head is structurally and developmentally divided into the
A. facial and labial regions. B. cranial and nuchal regions. C. cranial and facial regions. D. cranial and sternal regions.
Which is most directly responsible for the falling (repolarizing) phase of the action potential?
A. Voltage-gated Na+ channels are opened. B. The Na+, K+ pump restores the ions to their original locations inside and outside of the cell. C. The permeability to Na+ increases greatly. D. ATPase destroys the energy supply that was maintaining the action potential at its peak. E. The permeability to K+ increases greatly while that to Na+ decreases.