PVCC Bio 141 Lecture Exam 3 - Brain Questions and Answers 100% Verified
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PVCC Bio 141 Lecture
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PVCC Bio 141 Lecture
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...
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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