A Journey Through Your Nervous System

Which components make up the Central Nervous System (CNS)?

• Nerves in the fingers and toes

• Brain and spinal cord

• Peripheral nerves throughout the body

• Cerebrospinal fluid and bones

What is the main role of the Central Nervous System (CNS)?

• Digesting food and regulating heart rate

• Protecting the body from harm

• Controlling all bodily actions, from breathing to conscious movements

• Producing cerebrospinal fluid

What structures provide natural protection for the brain and spinal cord?

• Muscles and skin

• Cerebrospinal fluid and nerves

• Skull and vertebrae

• Ligaments and tendons

What is the Peripheral Nervous System (PNS)?

• The brain and spinal cord

• The nerves responsible for involuntary actions only

• All nerves in the body except for the Central Nervous System

• The system that controls breathing and heart rate

How does scratching an itch provide temporary relief?

• It directly removes the irritant from the skin.

• It temporarily numbs the nerve endings in the affected area.

• The brain perceives the scratching as pain, diverting attention from the itch.

• It increases blood flow to the area, flushing out irritants.

What is the body's primary mechanism for cooling down when it gets too hot?

• Blood vessels constrict to reduce heat absorption.

• The brain sends signals to reduce metabolic rate.

• Sweat glands are activated to release sweat, which cools the skin upon evaporation.

• Hair follicles stand on end to create an insulating layer.

How does the body generate heat when it is too cold?

• The brain increases blood flow to the skin surface.

• Muscles rapidly contract and relax, creating friction and heat.

• The body conserves heat by reducing sweat production.

• The central nervous system sends signals to increase appetite for energy.

What happens to neural connections in the brain when a person repeatedly practices a new skill?

• New neurons are generated to store the skill's information.

• Existing neural connections related to the skill become stronger and more numerous.

• The brain prioritizes the new skill by deleting older, less used connections.

• The central nervous system temporarily bypasses the brain for faster execution.