Lesson 20 - Nervous System flashcards |

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Rose of the Nervous System

Coordinates an animal's response to the environment

Sensory function

Senses changes both outside and within the body

Integrative function

Processes the information received from the sense organs

Motor function

Causes muscles to contract or glands to secrete in response to stimuli

CNS

Brain and spinal cord

PNS

Made up of somatic nervous system and autonomic nervous system

Sympathetic (SNS)

Stress related, fight or flight

Parasympathetic (PNS)

Rest and digest

Neurons

Composed of axons, dendrites, schwann cells, synapse and synaptic cleft/spaces

Brain and spinal cord

The Central nervous system consists of what two things

Sensory neurons

Carry information from the body parts to the central nervous system

Brain stem

Controls many basic life functions

Cerebrum

Center of conscious decision-making

Cerebellum

Involved in movement and motor control

Cerebrospinal fluid

Fluid that surrounds and protects the brain and spinal cord

Meninges

Three membranes the delicate nervous tissue and the protective bones, and provides additional mechanical protection and a stable chemical environment for the brain

Vagus nerve

Nerve that travels down the neck, below the vertebra

Reflex arc

Reflexes involve a sensory detector and afferent neurons which are linked within the CNS, to an efferent motor neuron

Afferent

Bring signals back into the CNS

Efferent

Carry signals out of the CNS

Sensory

Afferent nerves

Motor

Efferent nerves

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