During weeks 9-12 of fetal development, ________:
a. bone marrow begins to assume erythrocyte production
b. meconium begins to accumulate in the intestines
c. surfactant production begins in the fetal lungs
d. the spinal cord begins to be myelinated
Answer: a. bone marrow begins to assume erythrocyte production
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Gas emboli may occur because a ________.
A) person holds his breath too long B) diver holds his breath upon ascent C) pilot holds her breath upon descent D) person breathes pure oxygen in a pressurized chamber
Match the following muscle actions:
A) Extensor pollicis longus and brevis B) Flexor carpi ulnaris C) Extensor carpi radialis longus and brevis D) Flexor digitorum profundus 1) Flexes the wrist. 2) Slow-acting finger flexor. 3)Powerful wrist flexors that also stabilize the wrist during finger extension. 4) Extends and abducts the wrist. 5) Extends the thumb.
The partial pressure of _______ in the arteries is normally the most important input in regulating the magnitude of ventilation under resting conditions
Fill in the blank(s) with correct word
Which of the following is controlled by the somatic motor division?
A) cardiac muscle B) glands C) smooth muscle D) skeletal muscle