The acidic chyme entering the duodenum initiates all of the following actions EXCEPT the ________.
A. release of bicarbonate into bile
B. release of bicarbonate from the pancreas
C. intestinal phase of gastric function
D. release of serotonin from the duodenum
Answer: C
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A toughened layer of connective tissue that encircles and stabilizes a bone at a fracture site is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
Place these steps of muscle contraction in the correct order. 1. Action potential is generated along the sarcolemma 2. Nerve impulse arrives at synapse 3. Calcium is released into muscle cell cytoplasm 4. Acetylcholine is produced 5. Actin and myosin molecules continuously cross-link, with actin molecules being pulled inward
A) 2, 3, 4, 1, 5 B) 4, 2, 1, 5, 3 C) 1, 2, 4, 3, 5 D) 2, 4, 1, 3, 5 E) 1, 2, 4, 5, 3
As a venous pathway moves closer to the heart, the veins
A. get smaller. B. get larger. C. show no change in their lumen size.
The process of spermatogenesis from primary spermatocyte to sperm:
A. takes about three weeks in the human. B. occurs when a male is an embryo, ceasing at birth. C. requires participation of Sertoli cells. D. occurs in the epididymis. E. occurs as the cells gradually travel between two closely attached Leydig cells.