The touch receptor organs of the somatosensory system include _.
Correct answer: D. The skin only
- A. Somatosensory neurons
- B. The skin, joint tissues, and muscles
- C. Joint tissues and muscles
- D. The skin only
Explanation
While somatosensory neurons are found within specialised touch receptors, the touch receptor organ for the tactile system is the skin. These sensors will detect stimuli for pressure, temperature change, and pain. Though these sensations can be detected in some internal regions of the body as well, the sensation of touch must be triggered by an external stimulus. As such, the receptors must have contact with the external environment (via the skin).
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About Chemical Coordination and Hormones
Chemical coordination uses hormones released by endocrine glands and carried in blood to specific target cells. Coverage includes the pituitary, thyroid, pancreas, adrenal glands, ovaries and testes, feedback control, and the contrast between slower, longer-lasting hormonal responses and rapid nervous coordination.
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