General Science - Nervous System

(10-04-2025)

Nervous system

It is the body’s command center.

Brain, Nerves, and Spinal Cord

3 parts of the Nervous System:

Central Nervous System and Peripheral Nervous System

2 Major Divisions of the Nervous System

Brain and Spine

The Central Nervous System contains the _____ and _____.

Nerve and Nerve Tissue

The Peripheral Nervous System contains the ______ and _____ _______

Neuron

single nerve cell that transmits information via electrical and chemical signals.

Nerve

Bundled collection on axons that act as communication pathways in the Peripheral Nervous System.

Brain

Chief organ of the nervous system and consist of cerebrum, cerebellum, and the brain stem.

Axon

Long projections of many neurons.

Control and Coordination, Cognition and Emotion, and Communication

3 Functions of the Brain:

Control and Coordination

This function involves the voluntary and involuntary movements.

Cognition and Emotion

This function if for the center for thinking, learning, memory, problem-solving, and the interpretation of senses and emotions.

Communication

This function translates sensory information into meaningful messages, allowing for interaction with the world.

Sensing, processing, and responding

3 Functions of the Nerves:

Sensing

This function receives information from sensory receptors in your eyes, ears, skin and other parts of your body

Processing

The function that is in the nervous system, including the brain and spinal that interprets these sensory signals, to the brain.

Responding

The funcion which is based on the processed information which the nerves sends signals away from the brain.

Cerebrum, Cerebellum, and Brain Stem

3 parts of the Brain:

Cerebrum

The part of the brain that controls our conscious thoughts

Cerebellum

The part of the brain that is responsible for balance and skeletal muscles.

Brain stem

The part of the brain that is responsible for the body’s automatic activities

Left Side

This side of the Cerebrum is responsible for Intelligence.

Right Side

This side of the Cerebrum is responsible for Creativity

43

The main part of the Peripheral Nervous System consist of __ pairs of nerves

12

The Cranial Nerves consists of __ pairs of nerves

31

The Spinal nerves consists of __ pairs of nerves

Cranial nerves

Nerves that branch directly to the brain

Spinal nerves

Nerves that branch from the spinal cord

Sensory Nerves and Motor Nerves

2 Types of Nerves:

Sensory Nerves

It can transmit information to the brain and spinal cord.

It carries the signals to your brain to help you touch, taste, smell, and see.

Motor Nerves

It transmits information from the Central Nervous System to the muscles and other organs.

It carry signals to your muscles or glands to help you move and function.