Which muscle type depends solely on the sarcoplasmic reticulum as its calcium source?
A. Cardiac muscle
B. Skeletal muscle
C. Skeletal and smooth muscle
D. Smooth muscle
E. Smooth and cardiac muscle
Answer: B
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Each spinal nerve divides into a dorsal and a ventral ________
A) ramus B) tract C) ganglion D) plexus
The sensory fibers of the muscle spindle organs synapse onto
A) gamma motor neurons. B) alpha motor neurons. C) joint receptors. D) Golgi tendon organs.
What are the three major regions of the cerebellum? (Check all that apply.)
flocculonodular lobe infundibulum lateral hemispheres substantia nigra vermis
The hormone insulin is a composed of repeating units of amino acids and cannot be administered orally because the enzymes of the gastrointestinal tract will break the peptide bond through the process of hydrolysis, releasing individual amino acids.
a. nucleic acid b. glycogen c. protein d. steroid