26 terms

Nervous System Flashcards

Name the 3 types of neurons & their functions
Sensory neurons - carry impulses from the sense organs to the spinal cord & brain
Inter neurons - connect sensory and motor neurons and carry impulses between them
Motor neurons - carry impulses from the brain and spinal cord to muscles & glands
What is the function of the axon terminal
To send nerve signals to various parts of the body
Two divisions of PNS
Sensory Division
Motor Division
Function of CNS
Relays messages, processes information, and compares and analyzes information
Pathway of a message in the nervous system
Function of cerebellum
Coordinates and balances the actions of the muscles for movement
What is a reflex arc
Pathway that an impulse travels to control an action reflex
what is homeostasis
The process by which organisms keep internal conditions relatively constant despite changes in external environment
function of the axon
It carries impulses away from the cell body
Function of the PNS
It connects the CNS to the limbs and organs
Function of the cerebrum
Controls the voluntary or conscious activities of the body
-it is the site of intelligence, learning, and judgement
Function of the Somatic Nervous System
Regulates activities that are under conscious control, such as the movement of the skeletal muscles
Two parts of the brain stem and their functions
Pons and medulla oblongata - regulate the flow of information between the brain and the rest of the body
Two divisions of motor division
Somatic nervous system
Autonomic nervous system
Function of spinal cord
Processes reflexes
Function of Motor Division
Transmits impulses from the central nervous system to the muscles or glands
Function of the dendrite
Carry impulses from the environment or from other neurons toward the cell body
What is an action potential (impulse)?
The reversal of charges from negative to positive
What is a reflex?
A quick, automatic response to a stimulus
Function of the thalamus
Receives messages from all of the sensory receptors throughout the body and then relays the information to the proper region of the cerebrum for further processing
Function of hypothalamus
Acts as the control center for recognition and analysis of hunger, thirst, fatigue, anger, and body temperature
Function of the autonomic nervous system
Regulates activities that are automatic or involuntary
What does the myelin sheath do?
It increases the speed which the impulse cam travel
What does the cell body contain
The nucleus and much of the cytoplasm
Two main divisions of the nervous system?
The central nervous system
The peripheral nervous system
Function of the sensory division
Transmits impulses from the sense organs to the central nervous system