What happens to voltage-gated Ca++ channels on hair cells when the hair cells movetoward the shorter stereocilia?They open allowing Ca++ to exitThey open allowing Ca++ entryThey remain closedThey go from open to closed

Stereocilia These protrusions on the auditory and vestibular sensory cells, which are based on…

Answered: What happens to voltage-gated Ca++…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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The suprachiasmatic nucleus receives direct input from the retina and enables light dark circles to entrain circadian rhythms. What is the effect on a persons circadian rhythms of sleeping and waking if the retinal axons were somehow disrupted?
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The recycling of rhodopsin: involves quanylate cyclase but not arrestin all of the answers are correct takes place exclusively in the outer segment limits the enormous signal amplification of phototransduction The fovea centralis, the center of the fovea, is responsible for: Glaucoma Accommodation Blindness acute vision O OO
Actin and myosin in the sarcomeres will remain Douna. O Actin and myosin in the sarcomeres are in the unbound state. Question 41 Which of the following is an example of sensory adaptation? O After the wound healed, the pain also went away. O You notice the smell of liver and onions cooking when you enter the kitchen, but soon you do not notice the odor although they are still cooking. When it is totally dark, the rods and cones of the eyes do not send any visual impulses. O The act of trying to read a book while riding in a car causes eyestrain. Question 42 What determines "loudness"? O The number of hair cells that are stimulated. O The wave frequency or number of vibrations per second. O As the noise gets louder, the auditory (Eustachian) tube expands. 1 pts 1 pts
Photoreceptors in the retina have special channels that are open to Na+ in the dark. When light hits photoreceptors, these special channels close. What can you cònclude from this? None of the above O Photoreceptors hyperpolarize to light Photoreceptors depolarize to light Photoreceptor voltage does not change in the presence of light

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What happens to voltage-gated Ca++ channels on hair cells when the hair cells move toward the shorter stereocilia? They open allowing Ca++ to exit They open allowing Ca++ entry They remain closed They go from open to closed