Cell Membrane and Transport
Biology ⇒ Cell Biology
Cell Membrane and Transport starts at 7 and continues till grade 12.
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A cell is placed in a solution and water moves into the cell. Is the solution hypertonic, hypotonic, or isotonic to the cell?
A cell uses energy to move a substance from a low concentration to a high concentration. What type of transport is this?
Describe the direction of water movement when a cell is placed in an isotonic solution.
Describe what happens to an animal cell placed in a hypotonic solution.
A cell is placed in a solution and water moves into the cell. Is the solution hypertonic, hypotonic, or isotonic to the cell?
A cell uses energy to move a substance from a low concentration to a high concentration. What type of transport is this?
A red blood cell placed in a solution with a higher concentration of salt than inside the cell will ________.
Describe the direction of water movement when a cell is placed in an isotonic solution.
Which of the following best describes exocytosis?
(1) The movement of substances into the cell
(2) The movement of substances out of the cell
(3) The movement of water across the membrane
(4) The movement of ions through channels
Which of the following best describes the arrangement of phospholipids in the cell membrane?
(1) Tails facing outwards, heads facing inwards
(2) Heads facing outwards, tails facing inwards
(3) Random arrangement
(4) Single layer with heads and tails mixed
Which of the following best describes the fluid mosaic model of the cell membrane?
(1) A rigid structure with fixed proteins
(2) A flexible layer with proteins floating in or on the lipid bilayer
(3) A single layer of lipids
(4) A solid wall of carbohydrates
Which of the following best describes the main function of the cell membrane?
(1) Producing energy for the cell
(2) Controlling what enters and leaves the cell
(3) Storing genetic information
(4) Providing structural support to the cell
A red blood cell placed in a solution with a higher concentration of salt than inside the cell will ________.
Fill in the blank: The heads of phospholipids are ________, while the tails are ________.
Fill in the blank: The process by which cells expel materials in vesicles is called ________.
Osmosis is the diffusion of ________ across a selectively permeable membrane.
True or False: All molecules can freely pass through the cell membrane without assistance.
True or False: Carrier proteins change shape to move molecules across the membrane.
True or False: Endocytosis is a process by which cells take in large particles by engulfing them with the cell membrane.
True or False: Facilitated diffusion uses carrier proteins to move substances across the cell membrane.
