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BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition
STARR
ISBN: 9781305967359

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Chapter
Section
BuyFindarrow_forward

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition
STARR
ISBN: 9781305967359
Textbook Problem

Substance P ______.

a. increases pain-related signals
b. prevents perception of pain
c. is the active ingredient in aspirin
d. is a type of pain receptor

Summary Introduction

Introduction:

The ear is one of the five sensory organs of the body. It is responsible for performing two important functions, hearing and maintaining balance. The outer ear, middle ear, and inner ear are three different regions of the ear.

Explanation

Reason for correct answer:

Option a. is given as, “increases pain-related signals.”

Substance P is a peptide that acts as a neurotransmitter and neuromodulator. It is responsible for stimulating pain receptors, causing the feeling of pain to be exaggerated.

Reason for incorrect answer:

Option b. is given as, “prevent perception of pain.”

Substance P is responsible for elevating the perception of pain as it positively stimulates pain receptors. Hence, option b. is incorrect.

Option c...

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