Nerves are ________ of the nervous system
A) tissues
B) organ systems
C) cells
D) organs
E) organelles
D
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Which of the following is true regarding the levator scapulae?
A. It is innervated by the phrenic nerve. B. It elevates the scapula if the scapula is fixed. C. It rotates the scapula and depresses the apex of the shoulder. D. It flexes the neck if the scapula is fixed. E. It protracts the scapula if the humerus is fixed.
Which hormone has only one known effect:
to stimulate milk production by the breasts? A) oxytocin B) estrogen C) progesterone D) prolactin
Triads in skeletal muscle consist of which of the following?
A) sarcoplasm, sarcoplasmic reticulum, calcium ions B) sarcoplasmic reticulum, terminal cisterna, sarcoplasm C) two terminal cisternae and a T-tubule D) two T-tubules and one terminal cisterna
HIV is spread through sexual intercourse, hypodermic needles and sneezing or coughing.
a. true b. false