The articular surfaces of long bones are covered by:
a. articular cartilage
b. dense connective tissue
c. epiphyseal cartilage
d. cancellous bone
Answer: a. articular cartilage
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The intake of materials from the extracellular fluid using vesicles is called
A) osmosis. B) exocytosis. C) facilitated transport. D) endocytosis. E) an ion exchange pump.
Receptor-mediated endocytosis
A) is a type of secretion. B) imports target molecules after they bind to membrane proteins. C) does not require energy from the cell. D) can only move a substance down its concentration gradient. E) imports extracellular fluid, including all of its dissolved molecules.
This figure shows the humerus. Which number indicates the medial epicondyle?
A. 1 B. 4 C. 5 D. 2 E. 7
37) Which structure has pumps to remove calcium ions from the sarcoplasm to produce relaxation?
A) 6 B) 7 C) 1 D) 3 E) 2