Question

question 22 (4 points)
as a jackhammer operator who has experienced prolonged exposure to high - amplitude drilling. alex is beginning to lose his hearing. it is most likely that this hearing loss results from
the auditory canal
hair cells
ganglion cells
bipolar cells
question 23 (4 points)
according to the gate - control theory, a back massage would most likely reduce your physical aches and pains by causing the
release of pain - killing endorphines in your muscles
activation of nerve fibers in your spinal cord
the release of adrenaline into your bloodstream
deactivation of the pain receptors on the surface of your skin

Explanation:

Question 22

Prolonged exposure to high - amplitude sounds (such as those from a jackhammer) can damage the hair cells in the cochlea. Hair cells are responsible for converting sound vibrations into neural signals. Damage to them impairs the ability to detect sound. The auditory canal is just a passage for sound waves. Ganglion cells and bipolar cells are more related to visual or other neural pathways (not the primary site for sound - related hearing loss in this context).

According to the gate - control theory, activation of large - diameter nerve fibers (such as those stimulated during a back massage) can close the "gate" to pain signals in the spinal cord. This is not about the release of endorphins (which is more related to the opioid system), release of adrenaline (sympathetic nervous system response), or deactivation of skin pain receptors (the gate - control theory focuses on the spinal cord level).

Answer:

Hair cells

Question 23