Nervous system Flashcards
What are the two principle parts of the nervous system?
Central and Peripheral
Components of the central nervous system,?
- Spinal cord
- Brain
Functions of the nervous system
- Receives information
- Processes information
- Transfers information
Components of peripheral nervous system?
- Nerves outside the central nervous system
What are the communication cells of the nervous system?
Neurons (specialized cells for communication)
What are the 3 types of neurons?
- Sensory neurons : Neurons of the PNS. Receive stimuli and transmit information to the central nervous system
- Interneurons: Neurons of the central nervous system. Transmits information within the central nervous system
- Motor neurons: Neurons of the PNS. Tranmiyts information away from the central nervous system.
3 parts of neurons?
- Cell body
- Dendrites
3.Axon
What is the cell body?
Main part of the cell, has the nucleus and most of the cytoplasm and organelles
What do neurons initiate?
Action potentials
What is an action potential?
Electrical impulse
What is the primary mean of communication in the nervous system?
Action potentials
What is a target?
Another neuron, muscle cell, or gland
What is a synapse?
Special junction between axon and terminus and target cell
Refractory period?
action potential must completely finish before another can be generated
What does the cerebellum coordinate?
Basic body movements
The cerebellum stores and replicates sequences of skilled movements
True or false
true
What connects the higher brain centers to the spinal cord?
Pons
What aids medulla oblongata in regulating respiration?
Pons
What does the midbrain control?
Vision, hearing, sleep/wakefulness
What does the forebrain control?
Emotions and conscious thought
Limbic system
Pathways involved in emotions and memory
Cerebrum
Language, decision making, conscious thought
What serves as a gateway to and from the limbic system?
The hypothalamus
What are behaviors modified by?
The cerebrum
