吉林大学：《药理学》课程PPT教学课件（七年制）The autonomic nervous system

The autonomic nervous system

The autonomic nervous system

overview The nervous system exerts its influence by the rapid transmission of electrical impulses over nerve fibers that terminate at effector cells

overview ◼ The nervous system exerts its influence by the rapid transmission of electrical impulses over nerve fibers that terminate at effector cells

Introduction to the nervous system Anatomical divisions central nervous system(CNS) peripheral nervous system efferent division and afferent division autonomic system somatic system

Introduction to the nervous system ◼ Anatomical divisions central nervous system (CNS) peripheral nervous system efferent division and afferent division autonomic system somatic system

Nervous System Peripheral Central Nervous Nervous System System 58 69a时 Autonomic Somatic System System Parasympathetic Sympathetic Figure 3.1 Organization of the nervous system

ente四8 三eeto Figure 3.2 Efferent neurons of the autonomic nervous system

Autonomic system Sympathetic neurons increase heart rate,blood pressure,dilation of the pupils and the bronchioles Parasympathetic neurons visceral and cardiovascular systems

Autonomic system ◼ Sympathetic neurons increase heart rate, blood pressure, dilation of the pupils and the bronchioles ◼ Parasympathetic neurons visceral and cardiovascular systems

Functions Fight or flight response adrenal medulla Rest and digest Often oppose each other

Functions ◼ Fight or flight response adrenal medulla ◼ Rest and digest ◼ Often oppose each other

dype■ympathetic actions LACRIMAL GLANDS nt type parasympathetc actions Stimulates tears SALIVARY GLANDS ntraction of iris radial ce(pupil dilates) traction of iris sphincter vedoaam ACHEA AND BRONCHIOLES HEART increased rate:Increased contractility GASTROINTESTINAL Decrease in ETERS AND BLADDER GENITALIA-FEMALE Reiaxation of uterus BLOOD VESSELS Diletation ENITALIA-MALE BLOOD VESSELS erection Conatriction 3.3 of sympathetic (bold type)and parasympathetic (ight type)nervous systems on effector organs

Chemical signaling Local mediators do not enter the blood and are not distributed thought the body ■Hormones Neurotransmitters communication between nerve cells-and between nerve cells and effector organs

Chemical signaling ◼ Local mediators do not enter the blood and are not distributed thought the body ◼ Hormones ◼ Neurotransmitters communication between nerve cells-and between nerve cells and effector organs

Type of neurotransmitters 6 signal compounds- norepinephrine,acetylcholine,dopamine,serotonin, histamine,aminobutyric acid cholinergic and adrenergic are the primary chemical signals in the autonomic nervous system

Type of neurotransmitters ◼ 6 signal compounds￾norepinephrine, acetylcholine, dopamine, serotonin, histamine, aminobutyric acid cholinergic and adrenergic are the primary chemical signals in the autonomic nervous system