This figure shows the endocrine system. Which number indicates the thymus gland?
A. 1
B. 2
C. 3
D. 4
E. 6
Answer: C
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If a biopsy of the quadriceps muscles (muscles on the front of the thigh) were taken from gold medal-winning speed skaters in the four following events, which would most likely have the SMALLEST percentage of type 1 muscle fibers?
A. 1,000 meters B. 500 meters C. 10,000 meters D. 5,000 meters
The connective tissue covering the outer surface of a bone is (the)
A) matrix. B) osteon. C) periosteum. D) endosteum. E) articular cartilage.
Which of the following arteries supplying blood to the scalp is NOT a branch of the external carotid artery?
A. Supraorbital B. Occipital C. Superficial temporal D. Posterior auricular
During exercise, our vessels constrict and vessel radius decreases. What impact does a decreased vessel radius have on blood flow?
A) Blood flow remains the same. B) Blood flow decreases. C) Blood flow increases. D) Vessel radius has no impact on blood flow.