One division of the autonomic nervous system stimulates your salivary glands to secrete a watery solution of enzymes, and the other division stimulates them to secrete mucus. Together, these secretions constitute the saliva. This is an example of which of the following?
A. An antagonistic effect
B. A biofeedback effect
C. A sympathetic effect
D. A cooperative effect
E. A dual effect
Answer: D
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Which of the following statements about special senses is correct?
Special sense input is carried by both spinal and cranial neurons. Special sense stimuli are detected by the receptive endings of sensory neurons. All special senses, except smell, rely on specialized receptor cells to detect stimuli. Special senses detect stimuli such as touch, pain, and temperature.
Taste is detected when chemicals bind receptors on the microvilli of:
A) gustatory cells. B) supporting cells. C) basal cells. D) olfactory cells.
All triplets required to code for synthesis of a protein are a
A. gene. B. codon. C. proenzyme. D. pre-mRNA. E. ribosomal RNA (rRNA).
The respiratory zone of the tracheobronchial tree includes which of the following?
A. trachea B. alveoli C. primary bronchi D. larynx E. tertiary bronchi