Explanation Dopamine is a produced in the brain and belongs to catecholamines family. When dopamine is released from the axon terminal and then released into the blood stream, then it acts as a neurohormone. As a neurohormone its function is to inhibit prolactin secretion from the pituitary gland...

2nd Edition

ISBN: 9781259875120

Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.

Publisher: McGraw-Hill Education

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Question

Chapter 38.2, Problem 1BC

Summary Introduction

To determine:

When the molecule acts as neurotransmitter or neurohormone.

Introduction:

Neurotransmitters are chemical messengers that help in transmission of signals across the chemical synapse, like neuromuscular junction. The hormones that are secreted by the neuroendocrine cells in the blood are termed as neurohormones. Some neurohormones also act as neurotransmitters.

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Chapter 38.1, Problem 2TYK

Chapter 38.2, Problem 1TYK

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Dopamine, epinephrine (or norepinephrine) and histamine are important neurotransmitter agonists. When these ligands interact with their cellular receptors, how do they mainly elicit their responses? Choose the correct answer(s) and explain why. a) Activate adenylyl cyclase directly, leading to increased intracellular cAMP levels b) Activate phospholipase C c)Induce or inhibit synthesis of ligand specific intracellular proteins d) Open or close ligand gated ion channels e) Regulate intracellular second messengers through G-protein-coupled receptors

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Chapter 38 Solutions

Principles of Biology

Ch. 38.1 - Prob. 1TYK Ch. 38.1 - The synthesis of which class of hormone requires...Ch. 38.2 - Prob. 1BC Ch. 38.2 - Prob. 1TYK Ch. 38.2 - Prob. 2TYK Ch. 38.3 - Prob. 1BC Ch. 38.3 - Prob. 1TYK Ch. 38.3 - Prob. 2TYK Ch. 38.4 - Prob. 1CC Ch. 38.4 - Prob. 1TYK

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Solution Summary: The author explains that neurotransmitters are chemical messengers that help in transmission of signals across the chemical synapse, like neuromuscular junction.

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