organization of the nervous system

Central Nervous System (CNS)

Made up of the brain and spinal cord; integrates and processes information sent by the nerves.

Peripheral Nervous System (PNS)

Includes nerves that carry sensory messages to the CNS and send information from the CNS to muscles and glands.

Homeostasis

A state of relative stability in the body; the body can only survive in a narrow range of conditions.

Somatic Nervous System

Under conscious voluntary control; consists of receptors in the head and extremities and nerves that carry sensory information to the CNS.

Autonomic Nervous System

Controls glandular secretions and the functioning of smooth and cardiac muscles; not under conscious control.

Sympathetic Nervous System

Part of the autonomic nervous system; invoked by stress and is associated with the 'fight or flight' response.

Parasympathetic Nervous System

Part of the autonomic nervous system; promotes 'rest and digest' functions when the body is calm.

Motor Pathways

Nerves that send signals from the CNS to the muscles and glands.

Sensory Pathways

Nerves that carry sensory information to the CNS.

Organization of the Nervous System

Consists of the central nervous system and peripheral nervous system that control sensory input, integration, and motor output.

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

To integrate and process information sent by the nerves.

What does the Peripheral Nervous System (PNS) include?

Nerves that carry sensory messages to the CNS and send information from the CNS to muscles and glands.

Define homeostasis.

A state of relative stability in the body, necessary for survival within a narrow range of conditions.

What is the role of the Somatic Nervous System?

It is under conscious control and consists of receptors and nerves that carry sensory information to the CNS.

What does the Autonomic Nervous System control?

Glandular secretions and the functioning of smooth and cardiac muscles without conscious control.

What response is associated with the Sympathetic Nervous System?

The 'fight or flight' response triggered by stress.

What does the Parasympathetic Nervous System promote?

'Rest and digest' functions during times of calm.

What are Motor Pathways?

Nerves that send signals from the CNS to the muscles and glands.

Define Sensory Pathways.

Nerves that carry sensory information to the CNS.

What is the Organization of the Nervous System?

It consists of the CNS and PNS controlling sensory input, integration, and motor output.

Central Nervous System (CNS) consists of the ___ and ___; it integrates and processes information.

brain, spinal cord

The ___ Nervous System includes nerves that carry sensory messages to the CNS.

Peripheral

___ is a state of stability in the body necessary for survival.

Homeostasis

The ___ Nervous System is under conscious voluntary control.

Somatic

The ___ Nervous System controls glandular secretions and the functioning of smooth muscles.

Autonomic

The fight or flight response is associated with the ___ Nervous System.

Sympathetic

The ___ Nervous System promotes 'rest and digest' functions.

Parasympathetic

Motor Pathways are nerves that send signals from the CNS to the ___ and ___ .

muscles, glands

Sensory Pathways are nerves that carry sensory information to the ___.

CNS

The Organization of the Nervous System consists of the CNS and ___ .

PNS