Nervous System Flashcards

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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

Stimulus>sensoryneuron>interneuron>motorneuron>response

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

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