What releases interleukin-2 to activate humoral immunity?
A. TCytotoxic cell
B. THelper cell
C. APC
D. Macrophage
Answer: B
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The number of bones in the adult axial skeleton is ____________________.
Fill in the blank(s) with the appropriate word(s).
Answer the following statements true (T) or false (F)
1. The wall of the urinary bladder consists of elastic fibers and voluntary muscles. 2. The trigone is formed by the entry of the two ureters and the exit of the urethra. 3. The trigone is unique in the bladder wall because it is the only part with rugae. 4. The urinary meatus is part of the urethra. 5. The urethra is the tube leading from the bladder to the outside.
The sympathetic and parasympathetic divisions are subdivisions of the
A) afferent nervous system. B) autonomic nervous system. C) central nervous system. D) somatic nervous system.
Which one of the following is NOT associated with the right atrium?
A. pectinate muscles B. trabeculae carneae C. SA node D. AV node