Capillary walls consist of a single layer of epithelial cells, and they exchange substances
in the blood for substances in the tissue fluid surrounding body cells.
Indicate whether the statement is true or false
TRUE
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An example of a synchondrosis is the articulation of the
A) ribs with the sternum. B) radius and the ulna. C) femur with the acetabulum. D) atlas and the axis. E) navicular bone with the cuniform bones.
Only hormones that are not bound to plasma proteins are biologically active
Indicate whether the statement is true or false
Which of the following is involved in the process of muscle relaxation
a. acetylcholinesterase destroys acetylcholine to allow the muscle membrane to return to resting potential. b. Ca2+ is released by the sarcoplasmic reticulum c. cross bridge formation increases d. both (a) and (b) above. e. all of these answers.
Finding an antibody against the human immunodeficiency virus (HIV) is indicative of exposure to _________
Fill in the blank(s) with the appropriate word(s).