When comparing smooth and skeletal muscle cells, which of the following statements is true?
A. Smooth muscle cells have striations.
B. The myofilaments in smooth muscle do not form sarcomeres.
C. Smooth muscle cells are larger than skeletal muscle cells.
D. Smooth muscle has a lot of actin and myosin.
E. Smooth muscle cells are multinucleated.
B
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The neurotransmitter that controls skeletal muscle contraction is
A) beta endorphin. B) acetylcholine. C) nitric oxide. D) GABA.
A gene is best defined as _________________.
a) A segment of a chromosome that allows for DNA replication. b) a segment of DNA that carries instructions for the production of one polypeptide chain. c) A segment of a protein that directs the production of RNA. d) A segment of DNA that carries instructions for the product of a lipid.
Which of the structures below report head acceleration to the central nervous system?
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