human body structure and function 15... · differences between sns and ans autonomic nervous system...
TRANSCRIPT
بسم ميحرلا نمحرلا هللا
Clinical and industrial pharmacy
Human body structure and function
Semester: 2
lecture no. ( 15 and. 16 )
By:
Dr. weam.A .Mohamed
Phone no. 0912500983
Autonomic nervous system
Body control system
All body functions are regulated b
y two major system:
A.Nervous system.
B. Endocrine system (hormones)
Nervous system
Peripheral neurons of the SNS & ANS
Differences between SNS and ANS
Autonomic nervous system Somatic nervous system
• control smooth and cardiac muscle
• Control involuntary function
• Two neurons connect the CNS with target organ.
• Control the skeletal muscle
• Control voluntary function
• One neuron connect the CNS with the target organ.
Division of the ANS
Fight or flight
(stress)
Rest & digest
Parasympathetic
Differences between sympathetic and parasympathetic.
difference sympathetic parasympathetic
effects Generalized Localized
neurotransmitter Preganglionic (Acetylcholine)
postganglionic (norepinephrine )
Preganglionic (Acetylcholi
ne)
postganglionic (acetylcholi
ne)
Stimulus Stress condition Normal resting condition
Preganglionic neuro
n
Postganglionic neur
on
Short
Long
Long
short
Metabolism Catabolic that release high amount
energy
Anabolic that store energy
Origin (output) thoracolumbar craniosacral
Figure 15.4a
Generalize
Figure 15.4b
The effect of the parasympathetic are exerted by
acetylcholine.
The effect of the sympathetic are exerted by nor
epinephrine
organ Symp. effect Parasymp. effect
Eye pupil dilation constriction
Salivary gland Small secretion Large secretion
Bronchioles dilation constriction
Heart rate Increase Decrease
Contractility Increase No effect
GIT motility Decrease Increase
GIT secretion Decrease Increase
Vessels Constriction No effect
Micturition & defecation Inhibition Excitation
Sweating Increase No effect
Effect of symp. & parasymp. Stimulation
sympathetic
parasympathetic