Bio 270 Lecture Exam 2 JMU Hynd Exam Questions & Answers | Latest Already Graded A+ UPDATE 2025|2026!! Questions and Correct Answers/ Latest Update / Already Graded

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Bio 270 Lecture Exam 2 JMU Hynd Exam
Questions & Answers | Latest Already
Graded A+ UPDATE 2025|2026!! Questions
and Correct Answers/ Latest Update /
Already Graded
Astrocytes

Ans: glue that holds neurons in place, helps maintain ionic
concentration


Oligodendrocytes

Ans: Myelin sheath of CNS


Microglia

Ans: trashcans of brain, eat dead micro and neurons


ependymal

Ans: lining of ventricles (brain)


schwann cells

Ans: myelin sheath of PNS

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Four types of glial cells

Ans: astrocytes, oligodendrocytes, microglia, ependymal


blood brain barrier

Ans: capillaries sealed with tight junctions to prevent bad stuff
from getting to the brain


parts of the forebrain

Ans: diencephalon (thalamus and hypothalamus) and cerebrum
(basal nuclei and cerebral cortex)


gyrus

Ans: elevated folds of brain


sulcus

Ans: depressed fold of brain


Broca's area of brain

Ans: speaking ability, motor

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Wernicke's area of brain

Ans: Language comprehension, sensory


plasticity

Ans: brain's ability to have other areas compensate for any
damage if the damage happens young enough


electroencephalogram (alpha and beta rhythm)

Ans: EEG (brain test). Alpha- eyes closed. Beta- eyes open.


seizure

Ans: uncontrolled firing of neruons


small movement control

Ans: Basal nuclei/ganglia with thalamus


thalamus job

Ans: gets rid of extra sensory info that is not necessary to know



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