Nervous System Flashcards
1
Q
Parts of the Nervous System
A
Nervous System
- Brain
- Spinal Cord
- Nerves
2 Categories
- Central Nervous System (CNS)
- Peripheral Nervous System (PNS)
- Controls center of the body
- Control & directs all functions of the body system.
- interprets what is taking place in the eternal environment so muscles contract in relational to stimuli.
2
Q
Central Nervous System (CNS)
A
Nervous System
- Controls the entire body
Consists of
- Brain
- Spinal cord
3
Q
Peripheral Nervous System (PNS)
A
Nervous System
- Coordinates and facilities body mechanics
- via the somatic nervous system
- voluntary control of the skeletal muscles.
- Autonomic nervous system
- control cardiac and smooth muscles.
Contains
- Cranial & Spinal nerves
- connect the spinal cord and brain with muscles, glands & receptors.
4
Q
Neuroglia
A
Nervous System
Nerve Cell Terms
- Connective tissue cells that help protect the nerves tissue and bind it to other structures as well as aiding in the repair of cells
5
Q
Neuron
A
Nervous System
Nerve Cell Terms
- A functional cell of the nervous system that contains fibers, called dendrites, which carry messages away from the cell body.
6
Q
Dendrites
A
Nervous System
Nerve Cell Terms
- Short and branched neuron fibers that conduct impulses to the cell body
7
Q
Axons
A
Nervous System
Nerve Cell Terms
- Long neuron fibers that conduct impulses away from the cell body
8
Q
Synapse
A
Nervous System
Nerve Cell Terms
- Space between the junction of the two neurons where the termination of the axon of on neuron comes into close proximity with dendrites of another, thus ensuring that nerve impulses will travel in only one direction.
9
Q
Neurotransmitter
A
Nervous System
Nerve Cell Terms
- Substance that is released when the axon terminal of a neuron is excited and either inhibits or excites the target cell.
10
Q
Reflex Arc
A
Nervous System
Nerve Cell Terms
- The pathway through the nervous system that results in a reflex.
5 basic parts.
- Recptor
- Afferent (Sensory) neuron
- CNS
- Effector Neuron (Muscle)
- Efferent (Motor) Neuron
11
Q
Adrenaline (Epinephrine)
A
Nervous System
Nerve Cell Terms
- The physiological response to stress, secreted by the adrenal gland when the sympathetic nervous system is stimulated.
12
Q
Acetylocholine
A
Nervous System
Nerve Cell Terms
- A neurotransmitter at somatic neuromuscular junctions.
