During the development of lymphocytes, some pre-T and pre-B cells survive and develop into cells capable of an immune response, this is referred to as ______ selection
However some cells are suppressed from responding to self antigens, this is referred to as ______ selection.
A.
negative; positive
B.
neutral; negative
C.
negative; neutral
D.
neutral; positive
E.
positive; negative
E
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Which of the following is not correctly matched?
A) commissural fibers: interconnect the cerebral hemispheres B) arcuate fibers: short association fibers C) projection fibers: pass through the diencephalon D) association fibers: interconnect areas within a single cerebral hemisphere E) internal capsule: bands of association fibers
The larynx contains ________.
A) the thyroid cartilage B) a cricoid cartilage also called the Adam's apple C) an upper pair of avascular mucosal folds called true vocal folds D) lateral cartilage ridges called false vocal folds
Answer the following statements true (T) or false (F)
1. A tropic hormone causes another endocrine gland to release its hormone or grow. 2. The target organ for TSH is the thyroid gland. 3. ACTH stimulates the adrenal glands to release adrenaline. 4. FSH is frequently called the ovulating hormone. 5. The target organ for FSH is the ovarian follicle.
Within the medulla of the kidney are 8 to 18 striated, triangular structures called renal ____
a. papillae b. fascia c. columns d. pyramids