Answered: A patient presents with the chief…

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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Question

A patient presents with the chief complaint of being unable to perceive “saltiness,” but they can perceive other flavors. From the image below, you propose the following pathway changes for sour perceptions as an explanation for these symptoms:

A. The channels for Na+ were damaged

B. Voltage-gated Ca2+ channels are not functioning

C. There is no neurotransmitter release

D. The afferent nerve is damaged

E. All the above are viable pathway changes that would uniquely prevent the perception of salty

(b)
H+
sour ligand Na* salty ligand
Na* leak channel
K+
leak
channel
blocked [K] [Na]
Cell depolarizes and opens Ca²+
channels
+[Ca²+1
Triggers exocytosis of
synaptic vesicles
OCa²+

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