All of the following are true of the secondary response of humoral immunity except that it
A) depends on memory B cells.
B) results in much higher antibody titers than in the primary response.
C) results in much quicker rise in antibody titers.
D) produces more effective antibodies.
E) weakens quickly because memory B cells only survive for a year or two.
E
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During heart failure,
a. the Frank-Starling curve is shifted to the left. b. the heart pumps out a smaller stroke volume than normal for a given end-diastolic volume. c. a compensatory increase in sympathetic activity increases the contractility of the heart to normal in the early stages of the disease. d. both (b) and (c) above. e. all of these answers.
Through which plane of the body is a midsagittal section taken?
A. Horizontal plane B. Median plane C. Coronal plane D. Frontal plane
One of the standard tests of a newborn infant is to stroke the inside of its thigh to elicit the cremaster reflex. What would be the response you would expect to see?
A) twitching of the skin in the hypogastric region B) closing of the labia C) contraction of the dartos muscle D) penile rigidity E) testicular retraction
Answer the following statements true (T) or false (F)
1. The wall of the stomach is unique wall because it contains two muscle layers rather than one. 2. When the stomach is empty, its lining lies in folds called chyme. 3. The body of the stomach is the enlarged portion of the stomach that is to the left and above where the esophagus opens into the stomach. 4. The pyloric sphincter regulates the movement of food from the stomach into the small intestine. 5. Plicae and villi increase the surface area of the inner wall of the small intestine.