How It Works
The speed of the nervous system functions varies depending on what the body needs. Some actions may be voluntary actions while some may be _________.
Reflex Actions
The nervous system is a network of ______
Neurons
_____ are the structural and functional units of the nervous system
Neurons
The CNS is made up of the _____ and the ______
Encephalon and Spinal Cord
_____ _____ are fast, involuntary responses controlled by the spinal cord
Reflex actions
Voluntary actions are consious responses which are coordinated by the
Encephalon
What does CNS stand for?
Central Nervous System
The information received and generated by the nervous system travels in the form of ______
Nerve Impulses
______ ______ cushions and protects the encephalon from knocks and blows
Cerebrospinal Fluid
The spinal cord is a long bundle of ____
Nerves
Any voluntary action requires ______ like touch, or sight.
Receptors
What does PNS stand for?
Peripheral Nervous System
________ neurons are connected via their dendrites to a receptor
Sensory
The PNS is divided into the somatic and _____ PNS
Autonomic
Nerve impulses are waves of _____ _____
Natural Electricity
A voluntary action includes a ____ ____ along which the command travels to the effector organ.
Motor Nerve
The _______ is protected by the skull and 3 membranes
Encephalon
_____ Neurons are connected via their axon to an effector organ
Motor
Somatic
The ____ _____ (soma) houses the nucleus and the cytoplasmic organelles
Cell Body
A voluntary action includes an _____ _____ (a muscle for example) which contracts voluntarily to carry out the response.
Effector Organ
What are the sense organs?
Eyes, Ears, Nose, Tongue, Skin
In nervous tissue, the neurons are accompanied by ____ ____ which are responsible for neuron nutrition, defence, and support
The ____ PNS controls the involuntary function of the vital organs, such as the heart
Autonomic
The _____ has two hemispheres and a folded cortex. It is responsible for balance and pre-learnt voluntary movements such as walking, writing, or playing an instrument
Cerebellum