Chapter 31.2 Flashcards

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1
Q

Where does processing of information occur in the nervous system?

A

Processing occurs in the CNS - brain and spinal cord

Each major brain area (cerebrum, cerebellum, and brain stem) process and relay information. Spinal cord is the communication link between the brain and rest of body.

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2
Q

How do drugs change the brain and lead to addiction?

A

the brain reacts to excessive dopamine levels by reducing the number of receptors for the neurotransmitter. As a result, normal activities no longer produce the sensations of pleasure they once did.

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3
Q

What is a reflex?

A

A quick, automatic response to a stimulus

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4
Q

What is the cerebrum?

A

largest, most outer region of the bran responsible for the voluntary, (conscious) activities of the body.

Consists of 2 layers: cerebral cortex (grey matter) and White matter

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5
Q

What is the cerebral cortex?

A

outer layer of the cerebrum consisting of densly packed nerve cell bodies called grey matter. Responsible for thoughts, sensations, motor control, plans, learning abilities

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6
Q

What is the thalamus?

A

structure in the midbrain that receives messages from sensory receptors throughout the body and relays the information to the proper region of the cerebrum for further processing.

(switch operator)

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7
Q

What is the hypothalamus?

A

(hypo=below) the control center for recognition and analysis of hunger, thirst, fatigue, anger, and body temperature

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8
Q

What is the cerebellum?

A

(the little brain) receives and sends information about muscle and joint position, as well as sensory inputs.

Timing of motor movement

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9
Q

What is the brainstem?

A

structure that connects the brain and the spinal cord located below the cerebellum. Made of 3 parts:

1) midbrain
2) pons
3) medulla oblongata

Controls body’s most vital functions like blood pressure, heart rate, breathing, swallowing

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10
Q

What is dopamine?

A

A particular kind of neurotransmitter

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