Which muscle is the prime extensor of the elbow joint?
A. Biceps brachii
B. Triceps brachii
C. Deltoid muscle
D. Brachialis
E. Brachioradialis
Answer: B
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The appearance of pubic and axillary hair is characteristic of which stage of puberty?
A. Menopause B. Climacteric C. Thelarche D. Pubarche E. Menarche
Urea is
A. completely reabsorbed by the nephron. B. diffuse out of the collecting ducts into the interstitial fluid of the medulla and then diffuse into the descending loop of Henle. C. secreted into the filtrate by cells of the distal convoluted tubule. D. actively transported into the filtrate by cells of the collecting duct. E. None of the choices are correct.
An intercalated disc can be described as ______.
a. the boundary between longitudinal and circular smooth muscle layers b. the area of the sarcolemma where the motor neuron is located c. prominent nuclei strands observed in skeletal muscle d. a dark line observed between adjacent cardiac muscle cells
People who produce a lot of melanin have a skin tone that is ________
A) green B) brown C) blue D) pink E) orange