The ion that triggers the release of acetylcholine into the synaptic cleft is
A) sodium.
B) potassium.
C) calcium.
D) chloride.
E) magnesium.
Answer: C
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The layer of the epidermis that contains several layers of living cells connected by abundant desmosomes is the stratum
A) corneum. B) lucidum. C) basale. D) granulosum. E) spinosum.
Enzymes referred to as ____________________ enzymes use O2 to strip hydrogen from organic molecules
Fill in the blank(s) with correct word
The ____ functions as a reflex center in coordinating complex skeletal muscular movements
a. cerebrum b. corpus callosum c. diencephalon d. cerebellum
In an ECG pattern, the P wave is caused by
A. depolarization of atrial muscle fibers. B. depolarization of ventricular muscle fibers. C. repolarization of ventricular muscle fibers. D. repolarization of atrial muscle fibers.