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Biology Ch 5-7 NOTES

Chapter 5, 6, & 7 notes for biology. :)

QuestionAnswer
A cell's membrane only allows certain substances to pass through. This is know as ______. Selective Permeability.
Name the two ways that cells transport materials across their cell membrane. Passive Transport & Active Transport.
______ techniques do NOT require the cell to use its energy. (Energy source is the kinetic energy of a molecule.) Passive Transport
______ techniques DO require the cell to use its energy (ATP). Active Transport
Passive transport techniques include: diffusion, facilitated diffusion, osmosis, and ion channels.
Diffusion is the ... movement of molecules "down" a concentration gradient.
Diffusion occurs until... dynamic equilibrium is reached (molecules are evenly distributed)
Facilitated diffusion occurs when... molecules have difficulty crossing the cell membrane.
_______ is accomplished through the use of ________. Facilitated diffusion carrier proteins
Carrier proteins are... molecule specific
____ is too big to ____ easily through a membrane without the help of a ______ protein. Glucose diffuse carrier
__________ provide passage ways for specific ions. Ion Channels!
Ion channels are sometimes always... "open"
Some ion channels have ___ that can ____ & ____. "gates" open & close
Osmosis is the ______ of ______ across a selectively ______ membrane. diffusion water permeable
Osmosis is basically when ____ is moving from ____ concentration to ____ concentration. water high low
Isotonic Solutions _________ of _______ are the same as _____ and ______ of a cell. concentration solutes inside & outside
Water molecules enter and exit the cell at the same rate in ... Isotonic Solutions
There is ____ _____ movement of ____ in ____ solutions. no net water Isotonic
What is the solutions that the outside the cell that has less solutes than cytosol. Hypotanic Solutions
Water moves _____ during a Hypotanic Solution. IN!
Water moves OUT during a ________ solution. HYPERTONIC
In a hypertonic solution the _____ of the cell contains more ______ than _____. outside solutes cytosol
Created by: Alysa
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