Bio Test On Cell Membrane
Active transport, uses ATP, goes up against oncetration gradient, uses transport proteins?
Active Transport
A cell moves particles from an area of lesser concentration to a region of higher concentration by ________.
Active transport
What is the difference between active transport and passive transport?
Active transport requires energy and moves molecules from areas of lower concentration to areas of higher concentration. Passive transport does not require energy and moves molecules from areas of lower concentration to areas of higher concentration.
The structure most responsible for maintaining cell homeostasis is the _____.
Cell membrane
What is the movement of particles from an area of higher concentration to an area of lower concentration?
Diffusion
Passive transport, does not use ATP, goes with the concentration gradient, does not use transport proteins?
Diffusion, osmosis
Which of the following is not a form of passive transport? Diffusion Facilitated Diffusion Endocytosis Osmosis
Endocytois
Active transport, uses ATP, goes up against concentration gradient, does not use transport proteins?
Endocytosis, exocytosis
What is equal substances on both the inside and outside of the membrane?
Equilibrium
What is the continuous movement of particles but no overall change in concentration?
Equilibrium
When does diffusion occur until?
Equilibrium is reached
What is the release of waste or cell products from inside to outside a cell?
Excocytosis
Passive transport, does not use ATP, goes with the concentration gradient, uses transport proteins?
Facilitated diffusion
True or false: A solution in which the concentration of dissolved substances is lower than the concentration in a cell is HYPERTONIC.
False, Hypotonic
True or false: In PASSIVE TRANSPORT, the movement of particles across a membrane requires energy.
False, active transport
True or false: The passive transport of material across a membrane by means of transport proteins is called ACTIVATED DIFFUSION.
False, facilitated diffusion
When molecules move with the concentration gradient they move ________.
From an area of higher concentration to an area of lower concentration.
When molecules move against the concentration gradient they move ________.
From an area of lower concentration to an area of higher concentration.
Which organelle plays a large role in exocytosis by packaging proteins into vesicles?
Golgi body
If water leaves a cell and the conentration is higher inside a cell rather than outside, this is?
Hypertonic solution where plants and animals both do not like this environement because solute pulls out water so shrivels animals cells and plants lose tugor pressure (plasmolysis).
What are the functions of the cell membrane?
Maintain homeostasis Regulates what comes into and leaves the cell Give the cell its shape and support
Which organelle produces the energy needed for active transport?
Mitochondria
If a cell is placed in salt water, water leaves the cell by _____
Osmosis
What is the diffusion of water molecules through a selectively permeable membrane?
Osmosis
If water enters a cell, this is?
Osmosis and hypotonic environment where plants love to be but animal cells burst (cytolysis)
If water comes both in and out a cell and the concentrations are equivalent on both sides, this is?
Osmosis and isonic environement
What is the loss of water from a cell resulting in a drop in turgor pressure in plants? Plasma membrane detaches from the cell wall.
Plasmolysis
True or false: A membrane that allows only some materials to pass through shows SELECTIVE PERMEABILITY
True
True or false: ENDOCYTOSIS is a process by which a cell membrane surrounds and takes in material from the environment.
True
True or false: The internal pressure of plant is called TURGOR PRESSURE
True
If a cell normally contains 70% solute inside and the outside solution conatains 60% solute what happens?
Water moves into the cell
If it is not watered, a tulip plant will wilt because ________
it loses turgor pressure
A cell membrane is made up of a ______.
lipid bilayer
