Properties of Water Flashcards
Why is the water molecule polar?
There is an uneven distribution of electrons between the oxygen and hydrogen atoms.
Is the following sentence true? A water molecule is neutral.
True
Attraction between molecules of the same substance is called what?
Cohesion
Attractions between molecules of different substances is called what?
Adhesion
What is a mixture?
A material composed of two or more elements or compounds that are physically mixed together but not chemically combined.
A mixture of two or more substances in which the molecules in the substances are evenly mixed is called a(an)?
Solution
The greatest solvent in the world is?
Water
What is suspension?
A mixture of water and nondissolved material.
What is a substance that is dissolved?
Solute
What is a substance in which the solvent is solved?
Solvent
What happens during the process of facilitated diffusion?
An interval membrane protein assign a specific substances across the membrane.
What is the role of protein channels in the cell membrane?
The protein channels are the “tunnels” that allow proteins through the cell membrane.
Facilitated diffusion does not require the cell to use energy. T/F?
True
The energy requiring process that loves material across a cell membrane against a concentration difference is called….?
Active transportation
T/F: Active transport always requires transport proteins during the process.
True
Name the type: Process of taking material into the cell by means of unfolding a or pockets of the cell membrane.
Endocytosis
Name the type: “Cell eating” Extensions of cytoplasm surrounding a particle and package it within a food vacuole.
Phagocytosis
Name the type: The membrane of the vacuole surrounding the material fuses with the cell membrane forcing the contents out of the cell.
Exocytosis
How does the plasma membrane maintain homeostasis of a cell?
Maintains homeostasis by being selectively permeable.
Define diffusion.
The movement of molecules from an are of high concentration to an area of low concentration.
What are the 3 key factors that affect the rate of diffusion?
Concentration, temperature, pressure.
Diffusion continues until there is no ______?
Concentration
______ is the diffusion of water across a selectively permeable membrane.
Osmosis
Hypertonic means: exit/into
Exit
