Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
|
Name the three functions of the nervous system:
|
1. Sensory input - receptors are scattered around the body to pick up info i.e eyes, ears, skin
2. Integration - parts of the nervous system that process the info and decides if a response is required 3. Motor Output - if a response is required, the nervous system sends motor messages to parts of the body |
|
|
Describe how the Nervous system is organized:
|
1. Central Nervous system (CNS) - Includes Brain and spinal cord
2. Peripheral Nervous System (PNS) - Parts of the nervous system that exit from the CNS. I.e - spinal nerves and cranial nerves |
|
|
Define the different classifications of Neurons and their functions.
|
1. Sensory (Afferent) - Responsible for picking up sensory info
2. Motor ( Efferent) - Responsible for distributing motor info 3. Interneuron - responsible for connecting the sensory to motor neuron. |
|
|
Define Somatic.
|
Sensory coming from and motor going to the body.
|
|
|
Define Visceral.
|
Sensory coming from and motor going to glands and organs.
|
|
|
What are the two subcategories of Visceral?
|
1. parasympathetic - Rest and Digest
2. Sympathetic - Fight or flight Together these are termed the autonomic nervous system. |
|
|
What is a neuron made up of?
|
Cell body - Contains the organelles and nucleus of the cell
Dendrites - Extensions of cytoplasm attached to body responsible for directing impulses towards the cell body. Neurons can have many or one dendrite. Axon - Extension of cytoplasm attached to body responsible for directing impulses away from the cell body. |
|
|
What is an astrocyte?
|
These act as a "blood to brain" barrier. The are positioned between the capillary and neuron. They control what gets to the neuron from the vascular system. (CNS)
|
|
|
What is an Oligodedrocyte?
|
A non nervous cell responsible for the formation of a fatty myelin coating around some axons. Provides an insulation for the axon and thus impuses travel faster. (CNS)
|
|
|
What are Microglial?
|
Small cells that break down antigen that get into the CNS
|
|
|
What are Ependyma?
|
Cells that line the ventricles of the brain. Ventricles are slits or spaces in the brain.
|
|
|
What are Satellite Cells?
|
Cells that surround the sensory ganglia. Provide protection for the grouping of these cell bodies. (PNS)
|
|
|
What are Schwann?
|
Cells that give peripheral axons their myelin coating. Same idea as in the CNS but histological structure different.
|
