Nervous System Flashcards
The Nervous System
Controls, directs, and coordinates body functions
Central Nervous System (CNS)
- It is the brain and spinal cord
- It has 3 main parts: cerebrum, cerebellum, and the brain stem
Cerebrum
Is the largest part of the brain, includes the right and left hemisphere
Cerebral Cortex
The outside part of the cerebrum, controls voluntary muscle movement
Cerebellum
Coordinates muscle movements
Brain Stem
Connects the cerebrum to the spinal cord and contains message relay centres
Spinal Cord
Bundles of nerves and pathways enclosed in the spinal column. Relays information to and from the brain
Neurological Cell
1 of 2 types of nerve tissue. Supports neurons though nourishment, protection, and insulation
Neurons
Receive, process, and transmit information. Made of 3 parts: dendrite (receives information), cell body (the brain), and axon (links neurons, carries information)
Dendrite
Part of a neuron. Receives information
Cell body
Part of a neuron. Processes information.
Axon
Part of a neuron. Carries information.
Peripheral Nervous System (PNS)
Includes all nerves outside of the brain and spinal cord (the CNS).
Automatic Nervous System (ANS)
A specialized part of the PNS. Controls involuntary functions (BP, heart rate, intestinal contractions, etc).
Sympathetic Nervous System
Speeds things up when anxious, nervous, excited. (e.x., heart rate)