What neurotransmitter is released by all parasympathetic neurons?
A) acetylcholine
B) epinephrine
C) norepinephrine
D) dopamine
E) serotonin
Answer: A
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When the left and right splenius capitis contract together, the resulting movement is
A. wrinkling of the brow. B. flexion of the neck. C. elevation of the larynx. D. extension of the neck. E. pulling of the scalp anteriorly.
Vesicles can form from things entering the cell too
a. true b. false
A myofilament is the
A. contractile thread that extends the length of the muscle fiber. B. structural and functional unit of the skeletal muscle fiber. C. plasma membrane of a muscle fiber. D. protein strand composed of actin or myosin. E. cytoplasm of a muscle fiber.
The first respiratory structures without cartilage as a supporting tissue are ________
A) Primary bronchi B) Bronchioles C) Secondary bronchi D) Alveolar ducts