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Bio 121 > Lecture 17: Nervous System > Flashcards

Lecture 17: Nervous System Flashcards

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Biology 101 flashcards
0
Q

Thalamus

A

Relay center for sensory signals between SC, lower brain, and cerebrum.

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1
Q

Cerebellum

A

1/2 of all neurons in brain. Integration area. Regulates posture and balance, coordination of movements.

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2
Q

Hypothalamus

A

1) controls ANS
2) produces hormones
3) regulates emotional/behavioral patterns
4) regulates eating/drinking
5) controls temp
6) regulates circadian rhythms

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3
Q

Epithalamus

A

Pineal gland: melatonin

Melatonin: regulates circadian rhythms

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4
Q

Cerebral cortex

A

Gray matter. No myelin. Cell bodies

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5
Q

Fissures

A

Deep depressions

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6
Q

Gyri

A

Folds that increase surface area. Increase processing ability.

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7
Q

Sulci

A

Depressions or grooves

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8
Q

Longitudinal fissures

A

Separates right and left halves

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9
Q

Corpus callosum

A

White matter that connects hemispheres

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10
Q

Cerebral white matter (tracts)

A

Association: connect gyri in same hemisphere
Commisural: connect gyri in opposite hemispheres
Projection: connect cerebrum to lower CNS

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11
Q

Basal ganglia/nuclei

A

Memory
Attention
Emotional behaviors/anxiety
(Groups of cell bodies)

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12
Q

Limbic system

A 
Pain
Pleasure
Affection
Anger
Smell
Memory
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13
Q

Spinal cord external anatomy

A 
16-18". Stops at L2.
Cauda equina: nerve roots
Roots: 31 pairs
Dorsal: posterior. Ganglion. 
Ventral: anterior. Rounded.
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14
Q

Internal anatomy

A

Gray commisure: connects L and R sides of SC

Anterior white commisure: connects L and R

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15
Q

Gray matter

A

Anterior gray horns
Posterior gray horns
Lateral gray horns
(Regions)

16
Q

White matter

A

Anterior white columns (funiculi)
Posterior white columns
Lateral white columns

17
Q

Reflex arc

A 
Sensory receptor: dendrites
Sensory neurons: afferent
Integration: gray matter
Motor neuron: efferent
Effector: carry out response

Bio 121 (17 decks)

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