Which of the following is the most abundant leukocyte?
a. Neutrophil
b. Lymphocyte
c. Monocyte
d. Basophil
Answer: a. Neutrophil
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Electrical signals move through the mammalian heart in a particular order. Which order is correct?
A) SA node; internodal pathway; AV node; bundle of His; Purkinje fibers B) AV node; SA node; internodal pathway; bundle of His; Purkinje fibers C) SA node; AV node; internodal pathway; Purkinje fibers; bundle of His D) Bundle of His; Purkinje fibers; internodal pathway; AV node; SA node
The small muscle attached to the hair is called the:
a. hair papilla b. lanugo c. arrector pili d. hair root
During exercise, the energy necessary to sustain skeletal muscle cell contraction comes from
A. conservation of glucose. B. decreased sympathetic nervous system activity. C. increased epinephrine and glucagon release. D. increased insulin production. E. storing glucose as glycogen.
Which statement is true about intercostal nerves?
a. They are formed from the posterior rami of spinal nerves. b. They form a thoracic plexus of nerves. c. They originate from the thoracic part of the spinal cord. d. They innervate the lower limb.