Matching
A) Sodium ions
B) Acetylcholinesterase
C) Calcium ions
D) Acetylcholine
E) Creatine phosphate
27) The final chemical messenger and "trigger" for muscle contraction. It binds to troponin.
28) A neurotransmitter released at motor end plates by the axon terminals.
29) It diffuses across the cell membrane resulting in depolarization.
30) Activates synaptic vesicles in axon terminals to fuse with plasma membrane of axon terminal.
31) Used to convert ADP to ATP by transfer of a high-energy phosphate group. A reserve high-energy compound.
32) Breaks down ACh into its building blocks, rendering it ineffective.
27) C 28) D 29) A 30) C 31) E 32) B
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As a 20-year-old, Karl had his GFR measured by a urologist and found that it was 125 mL/minute. Now as Karl approaches 75 years old, he can expect that number to be cut
A. by a quarter. B. in half or more. C. by a fifth. D. by a third.
The adductor brevis has its origin on the
A) ilium. B) pubis. C) sacrum. D) iliac crest. E) linea aspera.
Whereas sodium is found mainly in the extracellular fluid, most ________ is found in the intracellular fluid
A) potassium B) chloride C) bicarbonate D) iron
Members of an aqua aerobics exercise class appreciate a property of their pool's contents. Which characteristic are they thankful for?
A. Water heats up faster than air. B. Water cools down slower than air. C. Water and air heat up at the same rate. D. Water and air cool down at the same rate.