University:
University of Virginia
Course:
NUCO 2330 | Health Assessment
Academic year:

2024
Views:

145

Pages:

1
Author:

Jarrett Richard

Cell Defense: The Plasma Membrane Phospholipids A phosphate head and two fatty acid tails Phospholipid head Hydrophilic which means water loving Phospholipid tails Hydrophobic which means water hating Where do the head and tails face? The head faces out towards the water and the tails face each other What do you have to put into the membrane in order to stabilize it? Cholesterol What is another word for selectively permeable? Semipermeable Semipermeable The membrane allows some substances to pass through easily, but does not allow others to pass Which two molecules can pass through the membrane? Explain Carbon dioxide and oxygen because they are nonpolar and small why for each. What three molecules cannot pass through the membrane? Explain why for each. Sugar because it's large and polar, and both the negative and positive ions because they are a charged substance What does polar mean? The molecules has partial charges Facilitated diffusion The process of transporting substances using channel proteins until there were equal amounts of it on both sides of the membrane What does moving from low to high concentration require? The use of energy to pump substances, which is also known as active transport What does Active transport use? Carrier proteins and ATP, which is cell energy What does the immune system use carbohydrates for? To recognize that your cells belong to you and are not viruses, bacteria, or other foreign cells What does the immune system do to foreign invaders? It kills them What kind of cell kills foreign invaders? Plasma membrane cells When are channel proteins used? Passive transport When are carrier proteins used? Active transport What is osmosis? Diffusion of ayer across a membrane from an area of higher concentration to an area of lower concentration What is the name of special proteins that let water pass through? Aquaporins What type of transport are aquaporins? Passive 1/1

Plasma Membrane: A Concise Overview

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