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Unit 1: Sections C & E
Why do organisms need water? Cellular Concentration. Cellular Homeostasis and the Plasma Membrane.
26
Biology
9th Grade
10/12/2015

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Term
What is a Plasma Membrane and what does it do?
Definition
A thin membrane around the cytoplasm of a cell; controls passage of substances in and out of the cell.
Term
What does Semi-Permeable mean?
Definition
Allows some molecule to pass through but not others.
Term
What is a Phospholipid?
Definition
Various compounds composed of fatty acids.
Term
What is Hydrophobic?
Definition
Abnormally afraid of water.
Term
What is Hydrophilic?
Definition
Having a strong liking for water.
Term
What is Diffusion?
Definition
The movement of particles from a high to low concentration of any solution.
Term
What is intracellular?
Definition
Liquid contained inside the cell membrane.
Term
What is extracellular?
Definition
Liquid containing proteins and electrolytes.
Term
What is a solute?
Definition
The dissolved substance in a solution.
Term
What is a solution?
Definition
A type of mixture in which the particles of one or more substances are distributed.
Term
What is a Solvent?
Definition
A liquid substance capable of dissolving other substances.
Term
What is Osmosis?
Definition
Diffusion of molecules through semi-permeable membranes from a high to low concentration until both sides are equal.
Term
What is Concentration?
Definition
The measure of the amount of solute in a solution.
Term
Kidney
Definition
1.either of two bean-shaped excretory organs that filter wastes from the blood and excrete them
Term
What does Excrete mean?
Definition
The bodily process of discharging waste matter
Term
What do Lungs excrete?
Definition
Carbon Dioxide and excess water.
Term
What does skin excrete?
Definition
Water and excess salts.
Term
What do kidneys excrete?
Definition
Urea, Water, and excess salts.
Term
What are the major organs?
Definition
Lungs, Skin, Kidneys, Urinary Bladder.
(Renal Artery, Renal Vein, Ureter)
Term
What is osmoregulation?
Definition
the process by which cells and simple organisms maintain fluid and electrolyte balance with their surroundings.
Term
What things might need to enter or exit a cell?
Definition
Blood, Oxygen (Ask Teacher)
Term
What is a Protein Receptor?
Definition
a nerve ending that senses changes in light, temperature, pressure, etc., and causes the body to react in a particular way.
Term
What is a Protein transport?
Definition
A type of protein that actively transports materials across a plasma membrane.
Term
What is a protein surface?
Definition
proteins that are embedded in or span the layer of cell membranes of more complex organisms.
Term
What are Carbohydrate Chains?
Definition
(Ask Teacher)
Term
How much of a cell is made up of water?
Definition
70% water
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