PB Biology Unit 13: Nervous System

25 terms by Nicholas_McMillan

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Central Nervous System

The brain and spinal cord

Peripheral Nervous System

the sensory and motor neurons that connect the central nervous system to the rest of the body

Sensory Somatic

conscience control over all skeletal muscles

Autonomic

This nervous system provides involuntary control over smooth muscle, cardiac muscle, and glands.

Sympathetic

Branch of the nervous system that prepares the body for an emergency

Parasympathetic

Branch of nervous system that prepares for homeostasis

Sense Receptors

detect stimulus

Neuron

transmits stimulus

Effector

in response to stimulus the muscles and glands produce hormones

Neuron

Basic unit of the Nervous System

Axons

a part of a neuron that carries impulses away from the cell body

Dendrites

branching extensions of neuron that receives messages from neighboring neurons

Mylen Sheath

insulates neuron and makes the messages transmit quicker

Sensory Neuron

transmits messages from receptor to CNS

Interneuron

transmits messages within the CNS

Motor Neuron

transmits messages fro CNS to the effector

Reflex

a nervous response without conscious control by the brain

Synapse

Spaces between neurons where impulses cross

Neurotransmitters

chemicals that allow the transmissions to cross the synapse

Cerebrum

part of the brain that controls personality, thinking, ability to taste and talk, sight etc

Cerebellum

part of the brains that controls muscle coordination, balance, and muscle tone

Medulla

part of the brain that is responsible for involuntary actions like muscle movement, heart beat, gland secretion and digestion

Ventricles

hollow interconnecting chambers filled with Cerebrospinal Fluid

Cerebrospinal Fluid

fluid that protects brain from trauma

Meninges

a membrane 3 layers thick that protects the brain and spinal cord

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