Summary Human Anatomy & Physiology ISBN 978-0134580999- autonomic nervous system, parasympathetic and sympathetic nervous systems, CNS, neurotransmitters, and adrenergic/cholinergic receptors

ANS

Lecture
&
Questions
and answers !

, The Nerrous System is divided into two :

CNS and PNS
1
afferent motor efferent division
Sensory
b skeletal muscles Division
somaticAutonomic

Somatic Nervous System (SNS) : Parasympathetic sempathetic
① control Responsible
: for voluntary control of skeletal muscles.
② Neural pathways Involves : a
single motor neuron that extends from the

CNS to the skeletal muscle it innervates (Somatic motor
Pathway)
.
·




smooth
and
Cardiac
-
Autonomic Nervous System
① control : Controls
involuntary functions of internal organs, glands,
and smooth muscles
s Cheart rate , digestion respiratory rate Pupillary response)
, ,




② Divisions : The ANS further
in to 2 more branches :




I
maintance excited
Parasympathetic Sympathetic

·
Rest and digest: Relaxed state, fight
· or
flight : often is

Promote digestion energy conservation ,
,
associated with
preparing the body
for action in response to stress or
danger
.




- Neural Pathway , involves
2 neurons in its motor
Pathway .
-
Neural
Pathway : it involves
1st neuron from the brainster, neurons in the motor

The first
Pathway ↑




2nd neuron synapses near or neuron originates in the


I
within the
target organ Spiner( cord and synapse with
Second neuron is the ganglion
outside the spinal cord .




A




All viceral organs are served by both divisions , but the cause


.
opposite (Dual innervention) !