Class Notes (920,269)
CA (542,226)
McMaster (43,208)
BIOTECH (12)
Dr.R (6)
Lecture 4

BIOTECH 3PM3 Lecture 4: McMaster University - BIOTECH - Pharmacology - Week 4

2 Pages
48 Views

Department
Biotechnology
Course Code
BIOTECH 3PM3
Professor
Dr.R

This preview shows half of the first page. Sign up to view the full 2 pages of the document.
McMaster University BIOTECH 3PM3 Pharmacology Week 04
Introduction of the Autonomic Nervous System
Nervous System Organization
Central Nervous System (CNS)
-Compromised of the brain and spinal cord
-Integrates and analyses signals
Cell body = nuclei , axons = tracts
Peripheral Nervous System (PNS)
-outside the brain and spinal cord
-relays sensory information to the CNS; motor commands
-cell body = ganglia , axons = nerves
Main function of the PNS is to connect the CNS to the limbs and organs
PNS is further divided;
Sensory : CNS receives and interpret via afferent nerves
Motor : CAN receives and interprets via efferent nerves
The Motor division is further divided into;
Somatic : Voluntary
Visceral : Involuntary
Overview of the ANS
-the ANS is composed of the nerves that travel to smooth and cardiac muscles
-these two types of involuntary muscle groups possess autorhymicity, which allows them to initiate their
own contractions
-smooth muscle tissues are found in glands and on organs
find more resources at oneclass.com
find more resources at oneclass.com

Loved by over 2.2 million students

Over 90% improved by at least one letter grade.

Leah — University of Toronto

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah — University of Toronto
Saarim — University of Michigan

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim — University of Michigan
Jenna — University of Wisconsin

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna — University of Wisconsin
Anne — University of California

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne — University of California
Description
McMaster University BIOTECH 3PM3 Pharmacology Week 04 Introduction of the Autonomic Nervous System Nervous System Organization Central Nervous System (CNS) -Compromised of the brain and spinal cord -Integrates and analyses signals Cell body = nuclei , axons = tracts Peripheral Nervous System (PNS) -outside the brain and spinal cord -relays sensory information to the CNS; motor commands -cell body = ganglia , axons = nerves Main function of the PNS is to connect the CNS to the limbs and organs PNS is further divided; Sensory : CNS receives and interpret via afferent nerves Motor : CAN receives and interprets via efferent nerves The Motor division is further divided into; Somatic : Voluntary Visceral : Involuntary Overview of the ANS -the ANS is composed of the nerves that travel to smooth and cardiac muscles -these two types of involuntary muscle groups possess autorhymicity, which allows them to initiate their own contractions -smooth muscle tissues are found in glands and on organs Muscles Cardiac striated, mono-nucleated Skeletal striated, poly-nucleated Smooth non-striated Why ANS? -To maintain homeostasis (Balance) -done by regulating the rate of the target organs activity -how is this done? Sympathetic and Parasympathetic Systems MOST organs are innervated (supplied with nerves) by both sympathetic and parasympathetic divisions EXCEPTIONS: adrenal glans, pilorector muscles of hair, sweat glands, and most blood vessels are only innervated by the sympathetic division Parasympathetic Division This division is more active during periods of rest and restoration. The parasympathetic nerves increase body functions such as digestion and elimination of waste products. Sympathetic Division Activation of the sympathetic division allows for greater expenditure of energy for both physical and mental exertion. Increased heart rate, force of myocardial contraction and bronchodilation are all responses to activation.
More Less
Unlock Document


Only half of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit