Download Sympathetic nervous system Parasympathetic nervous system

Divisions of the Nervous System AP
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Nervous System Graphic Organizer
Central Nervous System (CNS)
Peripheral Nervous System (PNS)
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
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Central Nervous System
The brain and spinal cord
Brain  more later!
Spinal Cord  ________________
 ________________
Peripheral Nervous System
-
____________________________
o 2 types of nerves
 Sensory _______________________________________________________
 Motor ________________________________________________________
Divisions of the PNS
Somatic
Autonomic
Sympathetic
Parasympathetic
Divisions of the Nervous System AP
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PNS – Divided into 2 Parts
Somatic nervous system ____________________
- ______________________
Autonomic nervous system
- _______________________
 ____________________________
 Constriction of blood vessels
 ____________________________
Autonomic nervous system is divided in two parts
Sympathetic nervous system
>> _______________________
Parasympathetic nervous system
>> _________________________
>>________________________________
Bases of
Comparison
Effect
Sympathetic
Neurons
>> ___________________________________
>> ________________________
Parasympathetic Neurons
Neurotransmitter
Restoring enzyme
Same
Same
Fight or Flight!
Adrenal Glands
Sudden simultaneous release of ___________________________
from all the sympathetic neurons (as in times of fright) has a critical effect.
It causes the release of the hormone __________________from the
interior of the ____________________ located on top of the kidneys.
The __________________________________________ what is known as
‘Fight or Flight” response.
They prepare the body to respond to danger in the following ways:
1. _______________________________________________________________________
2. _______________________________________________________________________
3. Sudden contraction of some muscles to tense the body up for action. Included in this is
the contraction of the diaphragm. A scared person will gasp, inhaling suddenly.
4. ______________________________________________________________________
5. Increased blood flow to the skeletal muscles so they are more able to act.
6. _______________________________________________________________________.
the
Divisions of the Nervous System AP
Divisions of Nervous System Graphic Organizer
6 Parts of the brain and function
1.
2.
3.
4.
5.
6.
(MMmmm …) Brain(s!!!!!!!!):
Medulla Oblongata
-Brain Stem (bottom of the brain)
-Pathway between _______________________________
-Controls: Vomiting, coughing, sneezing, hiccoughing, swallowing.
-Controls: __________________________________________________________.
Cerebellum
-Butterfly shaped
-Rear, lower portion of the brain
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Divisions of the Nervous System AP
-__________________________ portion of the brain
-Controls: Muscle co-ordination (smooth graceful motions)
__________________________________________________________.
Hypothalamus
-Located just above the pituitary gland.
-Controls: The _________________________________.
Hunger, thirst, sleep, body temp, water balance, and BP. Maintains
homeostasis by controlling endocrine control (more later)
Motor Control
Thalamus
-Above the hypothalamus
-Controls: _____________________ for information going to the ______________.
Channels info to appropriate place and prevents sensory overload.
Cerebrum
-________________________ of the brain
-Controls: ________________________________
Perceives sensory information
Initiates movements
-Contains 2 hemispheres (Right and left)
-Memory
-Parts: 1. Frontal Lobe- _________________________________
2. Parietal Lobe – ________________________________
3. Temporal Lobe – ______________________________
4. Occipital Lobe – Vision (overhead)
Corpus Callosum
-Holds the hemispheres of the Cerebrum together
-Conducts impulses from one side of the brain to the other.
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Divisions of the Nervous System AP
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What makes humans distinctive in this world? Is it the size of the brain?
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Not really … (elephant and whales are larger)
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Has to do with the size, increase in the folds of the cortex and the cortex’s ratio of the brain’s
total weight. (i.e. In shrews, the cortex accounts for 20% of the brain's weight, and in humans, it
accounts for 80%!)
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The increased folds, enable a larger cortical surface area to fit inside the cranial vault, allow for a
better organization of complex behaviours.