Nervous System

Nervous SystemBy: Jessica CalahorraAdrià Ribas

Central Nervous System• It consists of the brain and spinal cord. • It sends out impulses and tells the brain the senses you

perceive.

Peripheral Nervous SystemIt is divided into:• The Autonomic Nervous System• Sensory Receptors• 5 senses

Autonomic Nervous SystemIt regulates our involuntary actions like:• Digesting food• Keeping heart beating

BrainIt is divided into 5 parts.• The cerebrum• The cerebellum• The brain stem• The thalamus• The hypothalamus

The Cerebrum• Responsable for voluntary acts.• Contains: intelligence, learning, judgment.• Divided into: Left and Right hemispheres.• One analytic and the other artistic.

The Cerebellum• Located at the back of the skull.• It balances actions in the muscles.

The Brain Stem• It regulates the flow of information between brain and body. • Divided into the pons and the medulla ablangata.

The Thalamus• Receives messages from the sense organs.• It transports them to a certain part of the cerebrum.

The HypothalamusLocated under thalamus.Recognizes + Analyzes:• Hunger• Thirst• Fatigue• Anger• Body Temperature

Sensory Receptors• Pain Receptors• Thermoreceptors• Mechanoreceptors• Chemoreceptors• Photoreceptors

Neuron• Cells that transmit electrical signals called impulses.

Depressants• Slow down heart rate.• Slow down breathing rate.• Lower blood pressure.• Relax muscles.• Relief tension.

StimulantsIncrease:• Blood rate• Heart rate• Breathing rate

Vision• Eye: sense organ that we use to sense light.

Hearing• Ears: we can distinguish the pitch of the vibrations in the air.