Conformation is
A) the ability of DNA to copy itself.
B) the amino acid sequence (primary structure) of a protein.
C) the energy held in the bonds of an organic molecule, such as a protein.
D) the three-dimensional shape of a molecule, such as a protein.
D
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Shrinkage of tissue by a decrease in either cell number or cell size is termed
A. hypertrophy. B. neoplasia. C. atrophy. D. metaplasia. E. fibrosis.
These receptors detect changes in pressure within the body.
A. Photoreceptors B. Mechanoreceptors C. Thermoreceptors D. Chemoreceptors E. Baroreceptors
Identify the true statement(s) about sensory receptors:
a. The larger the receptor potential, the greater the frequency of action potentials initiated in the afferent neuron. b. Tonic receptors often exhibit an "off-response." c. Phasic receptors are important in situations where maintained information about a stimulus is valuable. d. Receptor adaptation results from nerve fatigue. e. Receptors are part of efferent neurons.
Adjustment to close-range vision involves all of the following except __________.
A. activity of the extrinsic eye muscles B. change in the curvature of the lens C. constriction of the pupil D. ciliary muscle activity E. light adaptation