A skeletal muscle fiber is
A. an elongated series of muscles held together by dense connective tissue.
B. a skeletal muscle cell.
C. a collection of several muscles bound together by a membrane.
D. found only in cardiac muscle.
E. a contractile filament within the osteon of bone.
Answer: B
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Each amino acid differs from others in the
A) chemical structure of the R group. B) size of the amino group. C) number of carboxyl groups. D) number of central carbon atoms. E) number of peptide bonds in the molecule.
Blood pressure is highest in the aorta and lowest in the:
a. arterioles b. capillaries c. arteries d. superior and inferior vena cava
The hypothalamus is connected to the anterior pituitary by:
A) neural connections B) sinuses C) short blood vessels D) membrane receptors E) none of the above
Let's suppose scientists have discovered a new disease that arises when antigen-presenting cells (APCs) are not made by the body. How do you think our immune response will be impacted?
What will be an ideal response?