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MCAT Word List # MCAT/W77

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Description of villus (noun: plural: villi)
finger-like projection from a surface of a membrane

Samples of villus
The small intestine are lined with villi to help with food absorption.



   
Description of hair (noun: plural: hairs)
skin appendage; epidermal outgrowth

Samples of hair
Hair helps insulate the body.



   
Description of white matter (noun: no plural)
nerve tissue of the central nervous system that is pale in comparison to the gray matter because it contains more nerve fibers (the myelin covering the nerve fibers is white)

Samples of white matter
Most of the cerebrum is made of white matter.

Determination of white matter
Dictionary.com · Cambridge Dictionaries · Merriam-Webster · Onelook.com


   
Description of respiratory system (noun: plural: respiratory systems)
the lungs and airways which are involved in gas exchange

Samples of respiratory system
The respiratory system helps maintain the acid-base balance of the blood as well.

Determination of respiratory system
Dictionary.com · Cambridge Dictionaries · Merriam-Webster · Onelook.com


   
Description of sternum (noun: no plural)
a flat bone at the front of the chest that closes the thorax

Samples of sternum
The sternum connects to 7 of the ribs.



   
Description of membrane potential (noun: no plural)
the difference in potential between the inside and the outside of a cell

Samples of membrane potential
The membrane potential exists because there is an ionic gradient (difference) between the inside and outside of the cell.

Determination of membrane potential
Dictionary.com · Cambridge Dictionaries · Merriam-Webster · Onelook.com


   
Description of neurilemma (noun: plural: neurilemmas)
a cellular sheath composed of Schwann cells which envelops the axons of peripheral neurons

Samples of neurilemma
The neurilemma is important in the regeneration of nerve tissue following injury.



   
Description of corpuscle (noun: plural: corpuscles)
another term for cell

Samples of corpuscle
Red corpuscles are made in the bone marrow and spleen.



   
Description of head (noun: plural: heads)
the part of the body that sits on top of the neck

Samples of head
The head contains the brain and important sense organs, for example the eyes.



   
Description of substitute (noun: plural: substitutes)
something that takes the place of something else; a replacement

Samples of substitute
Vitamin pills are no substitute for a good; balanced diet.



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