________ are molecules that bind to the receptor in such a way that they block the normal ligand from binding and turning the receptor on. As a result, the signal pathway remains inactive.
Fill in the blank(s) with the appropriate word(s).
Antagonists (or Competitive inhibitors)
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Nociceptors are responsible for the perception of
A) itch only. B) pain only. C) pain and itch. D) skin stretch only. E) pain and skin stretch.
Which nutrient supplies the largest part of an animal's diet?
What will be an ideal response?
What trait facilitates the alveolus performing its function?
A) Hyaline cartilage to keep structure patent B) Mucus-producing goblet cells to trap debris C) Thin, flat epithelium for diffusion D) Cilia to sweep out mucus
Which of the following events in a stretch reflex occurs last?
A. alpha motor neurons transmit action potentials to muscle causing contraction B. muscle spindle detects stretch of muscle C. afferent neurons conduct action potentials to the spinal cord D. afferent neurons synapse with alpha motor neurons E. muscle is stretched