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PVCC Bio 141 Lecture Exam 3 - Brain Questions and Answers 100% Verified
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Run in three directioAscendingns• : up to higher centers (sensory inputs)• Descending: from brain to cord or lower cord levels (motor outputs)• Transverse: from one side to other (commissural fibers) - ️️Ascending Three openings connect fourth ventricle to __________________________ th...

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  • November 12, 2024
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  • 2024/2025
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PVCC Bio 141 Lecture Exam 3 - Brain
Run in three directioAscendingns• : up to higher centers (sensory inputs)• Descending:
from brain to cord or lower cord levels (motor outputs)• Transverse: from one side to
other (commissural fibers) - ✔️✔️Ascending

Three openings connect fourth ventricle to __________________________ that
surrounds brain - ✔️✔️subarachnoid space


What part of the brain is the site of the conscious mind and is the superficial layer of
gray matter? - ✔️✔️Cerebral cortex


Adult brains have what four regions? - ✔️✔️Cerebral Hemispheres, Diencephalon,
Brain Stem, Cerebellum

brain stem consists of - ✔️✔️midbrain, pons, medulla oblongata

Gray matter contains what? - ✔️✔️Cell bodies

White matter contains what? - ✔️✔️Axons

What is the large cavity on the brain stem called? - ✔️✔️Central cavity (fourth ventricle)

What is a fluid filled chamber that is continuous with one another filled with CSF? -
✔️✔️Ventricles

What separates the lateral ventricles? - ✔️✔️septum pellucidum

Each lateral ventricle connects to what other ventricle? - ✔️✔️third ventricle

Cerebral hemispheres account for what % of brain mass? - ✔️✔️83%

What are the raised parts of the brain called? - ✔️✔️Gyrus

Shallow grooves of the brain are called? - ✔️✔️Sulci

Deep grooves of the brain are called? - ✔️✔️Fissures

What fissure separates the cerebral hemispheres? - ✔️✔️longitudinal fissure

, What fissure separates the cerebellum from the cerebral hemispheres? -
✔️✔️transverse fissure

How many lobes does the brain have? - ✔️✔️5

What are the 5 lobes of the brain? - ✔️✔️frontal, parietal, temporal, occipital, insula

Where is the insular lobe located? - ✔️✔️deep to lateral sulcus

There are ____-central and _____-central sulcus. - ✔️✔️pre, post

What sulcus divides the precentral and post central gyrus? - ✔️✔️Central sulcus

What sulcus separates the occipital and parietal lobes? - ✔️✔️Parieto-occipital sulcus

The cerebral cortex is what % mass of the brain? - ✔️✔️40%

Cerebral cortex has what three types of functional areas? - ✔️✔️Motor areas, sensory
areas, association areas

Where is the primary motor cortex located? - ✔️✔️precentral gyrus

Where is the premotor cortex found? - ✔️✔️just anterior to precentral gyrus

What cells are in the primary motor cortex? - ✔️✔️pyramidal cells

The idea that all muscles of body can be mapped to area on primary motor cortex is
called? - ✔️✔️Somatotopy

What is broca's area involved in? - ✔️✔️Planning speech and directs muscles to move

Frontal eye fields control what? - ✔️✔️Voluntary eye movements

What are the eight main sensory areas of the cerebral cortex? - ✔️✔️primary
somatosensory cortex, somatosensory association cortex, visual areas, auditory areas,
vestibular cortex, olfactory cortex, gustatory cortex, and visceral sensory area

primary somatosensory cortex is for: - ✔️✔️sense of touch

Somatosensory association cortex is for: - ✔️✔️understanding of touch

primary visual cortex is for: - ✔️✔️vision

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