Nervous System Test

The communication system of the body: Sensory Function Integrated Function Motor Function

The nervous system gathers information about changes occurring inside and outside of the body using our SENSES. this is called SENSORY INPUT. • Carries messages from our senses to our CNS using sensory input.

After the nervous system gains the sensory input, the brain now processes the input and decides what should be done.

The nervous system responds to the signals and causes a response by activating a muscle or a gland. This is MOTOR OUTPUT. • Carries messages from the CNS to the muscles or glands using motor output.

Something that warrants a response from the nervous system (smell, feeling, etc)

Central Nervous System (CNS) Peripheral Nervous System (PNS)

Brain Spinal cord CENTRAL in the body Where integrated Function occurs

Cerebrum Cerebellum Medulla Oblongata

Diameter of a pencil Slightly flexible Can be broken by vertebrae sliding and snapping it. Wherever the break occurs, from there down, the nervous system cannot communicate leading to paralysis.

Sensory Function and motor Function occurs here.

Autonomic Division Somatic Division

Branch of the Motor Function everything involuntary - automatic - in the body. Carries messages from the CNS to the cardiac muscles, smooth muscles (lining hollow organs), or a gland. Two branches: Sympathetic and Parasympathetic

Branch of the Autonomic Division On button - e.g. when you begin running and your body is signaled to increase sweat.

Branch of the Autonomic Division. Off button - when you stop running, your body is signaled to reduce sweating.

Branch of Motor Function. Everything voluntary. Carries messages from the CNS to the skeletal muscles (raising arm, etc).

In order to increase surface area while keeping it the same size in order to store and process more information.

Largest part of the brain (main squishy part) Center of intelligence and thought Controls memories, learning, senses, and VOLUNTARY movements.

Found just below the cerebrum in the brain. Controls balance Cats have a very large cerebellum which is why they have such incredible balance.

Found beneath the cerebellum in the brain. Controls all INVOLUNTARY movements (sneezing, breathing, heart beating, gland secretion, etc)

Attaches to the brain as part of the CNS. Carries messages to/from the brain.

Part of the Peripheral Nervous System. Carries messages from the spinal cord to muscles and glands and back.

Nerve Cells With nerve glue, they form nerve tissues. Designed to transmit messages as nerve impulses from one part of the body to another. 3 types (all have same structure): Sensory Neurons Interneurons Motor Neurons

neuroglia

Carry nerve impulses from sensory receptors to the CNS