Which part of the brain is crucial for coordination, posture, balance, and motor learning?
A. Pineal body
B. Limbic system
C. Cerebellum
D. Cingulate cortex
Answer: C
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During the rising (depolarizing) phase of a neuronal action potential,
A. PK+ becomes much greater than PNa+. B. K+ flows rapidly into the cell. C. PK+ is the same as PNa+. D. Na+ efflux (flow out of the cell) occurs. E. PNa+ becomes much greater than PK+.
What is the correct sequence of steps in bone repair? 1. Cartilage in the external callus is replaced by bone. 2. A hematoma occurs. 3. An internal callus forms at the site of injury. 4. Osteoclasts and osteoblasts remodel the bone at the site of repair
A) 1, 2, 3, 4 B) 2, 1, 3, 4 C) 3, 1, 4, 2 D) 4, 2, 3, 1 E) 2, 3, 1, 4
As the urethra passes through the pelvic floor, it is encircled by which urethral sphincter?
a) external b) spongy c) internal d) membranous
Once a B lymphocyte has been activated to an antigen, it travels to a secondary lymphoid organ and forms a ________ where cloning occurs.
A. germinal center B. CD4 C. MHC molecule D. FAS