Chapter 7- Nervous System Flashcards
The Function: Nervous System
Uses sensory receptors to monitor changes occurring both inside and outside the body
Name the 2 subdivisions of the Nervous System
Central Nervous System
Peripheral Nervous System
The Function: Neuroglia cells (nerve glue)
Support, Insulate and Protect the delicate neurons
The Function: Neurons (nerve cells)
Highly specialised to transmit messages from one part of the body to another
Name the 2 major functions of Neurons (nerve cells)
- Irritability
2. Conductivity
(Nervous System)
Define: Irritability
the ability to respond to stimulus and convert it into a nerve impluse
(Nervous System)
Define: Conductivity
the ability to transmit the impulse to other neurons, muscles or glands
Name the 4 major regions of the Brain
- Cerebral Hemispheres
- Diencephalon
- Brain Stem
- Cerebellum
Name the 3 regions of the Cerebrum (cerebral hemispheres)
- Cerebral Cortex
- Cerebral White Matter
- Basal Nuclei
Name the 3 major structures of the Diencephalon
- Thalamus
- Hypothalamus
- Epithalamus
The Function: Brain Stem
provides a pathway for ascending and descending tracts
Name the 3 structures of the Brain Stem
- Midbrain
- Pons
- Medulla Oblongata
The Function: Cerebellum
Provides the precise timing for skeletal muscle activity and controls our balance and equilibrium
The Function: Spinal Cord
- Provides a 2 way conduction pathway to and from the brain
2. Is a major reflex centre
Define the Structure: Peripheral Nervous System
Consists of nerves and scattered groups of neuronal cell bodies found outside the CNS
How many cranial nerves are there?
12 pairs
How many spinal nerves are there?
31 pairs
Define: Autonomic Nervous System
Is the motor subdivision of the PNS that controls body activities automatically
What are the 2 subdivisions of the PNS?
- Somatic nervous system
2. Autonomic nervous system
Define: Sympathetic Division
“Flight or Fight” response
Define: Parasympathetic Division
Is when the body is at rest
Define: Nervous System
Is the master controlling and communication system of the body
