The Autonomic Nervous System

Cocaine as a sympathomimetic drug

• Synapses en passant

Sympathetic and parasympathetic axons release different neurotransmitters (fig. 9.9)

Varicosity

Smooth muscle cell

Varicosity

Smooth muscle cell

Parasympathetic Neuron

Sympathetic neuron

Synapses en passant

Parasympathetic neuron

Sympathetic neuron

Synapses en passant

Parasympathetic neuron

Axon of Sympathetic Neuron

Synaptic vesicle with norepinephrine (NE)

Axon of Sympathetic Neuron

Synaptic vesicle with norepinephrine (NE)

Autonomic Neuron Varicosity

Adrenergic receptors

Smooth muscle cell

Adrenergic receptors

Antagonistic effects Cholinergic receptors

Smooth muscle cell

Antagonistic effects Cholinergic receptors

Adrenergic Receptor

Axon of Parasympathetic Neuron

Synaptic vesicle with acetylcholine (ACh)

Axon of Parasympathetic Neuron

Synaptic vesicle with acetylcholine (ACh)

• The receptors involved in autonomic regulation (fig. 9.10)

• Comparison of nicotinic and muscarinic receptors (fig. 9.11)

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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