Symptoms are
A. subjective characteristics of a disease that only the patient can feel.
B. objective manifestations of a disease that can be measured.
C. objective manifestations of a disease that can be observed by others.
D. characteristics of a disease, such as sweating.
E. laboratory tests used to diagnose a disease.
Answer: A
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An essential amino acid is best defined as one that:
A. cannot be synthesized by cellular biochemical pathways. B. is necessary for building proteins. C. cannot be obtained through the diet. D. functions as a vitamin. E. is required in large amounts.
A key is placed into a keyhole then turned and the door opens. When considering the components of cell signaling, the action of turning the key would best correspond to ______.
A. signal transduction that occurs when the receptor binds the hormone B. the cell response that occurs when the receptor binds the hormone C. the concentration of the hormone D. conformational change in the receptor once bound to the hormone E. the binding site of the receptor
When epidermal growth factor binds to its _____________, the receptor phosphorylates itself, triggering a signal transduction pathway.
A. thermoreceptor B. G-protein coupled receptor C. mechanoreceptor D. ligand-gated ion channel receptor E. enzyme-linked receptor
Body cells that respond to insulin include
A) Liver cells, as well as most other cells of the body. B) Liver cells and muscle cells only. C) Intestinal cells only. D) Muscle cells only. E) Liver cells only.