This figure shows the muscles of the anterior neck. What muscle does number 3 indicate?
A. Sternocleidomastoid
B. Trapezius
C. Sternothyroid
D. Geniohyoid
E. Sternohyoid
A
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Why is regional infection or inflammation of the skin usually very painful?
A nephron consists of
A) an afferent and an efferent arteriole. B) a cortex and a medulla. C) a bladder and a ureter. D) a renal corpuscle and a renal tubule.
The walls of bronchioles are dominated by ________, whose activity is regulated by the autonomic nervous system.
A) C-shaped rings of hyaline cartilage B) elastic cartilage C) skeletal muscle D) a mix of cartilage plates and smooth muscle E) smooth muscle
Which of the following is NOT true of the sympathetic division of the ANS?
A. The preganglionic neurons are short. B. The postganglionic neurons are long. C. The ganglia are located near the effectors. D. Cell body of the preganglionic neuron is in the thoracolumbar region of the spinal cord.