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61 Cards in this Set
- Front
- Back
Requires NO energy to move things across the cell membrane
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Simple diffision
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In simple diffusion, molecules move from an area of _________ concentration to an area of _________ concentration
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high, low
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Why is diffusion considered a passive process?
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No energy is used to make the molecules move
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With diffusion, molecules move by thier own natural _________ energy or energy of motion.
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kinetic
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Energy of motion
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kinetic energy
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Explain what happens to a drop of food coloring when you put it into a beaker of water.
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It diffuses
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When solutes diffuse throug a memberane what do they do.
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Move from a high to a low concentration.
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What is diffusion of water across a cell membrane
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osmosis
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What is osmosis?
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The diffusion of water across a cell membrane.
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If water potential is HIGH, solute concentration is ________.
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low
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If water potential is LOW solute concentration is ________.
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high
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Water moves from _____ water potential to _____ water potential.
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high, low
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Water diffuses through the _________ ________ of the cell membrane
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phospholipit bilayer
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What is meant by NO NET movement
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equilibrium
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Sketch a picture of a cell in an isotonic environment and show the direction of water movement
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(Draw picture)
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Sketch a picture of a cell in an Hypotonic environment and show the direction of water movement.
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(Draw picture)
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Sketch a picture of a cell in an hypertonic environment and show the direction of water movement.
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(draw picture)
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What occurs whenever water moves out of a cell and the cell shrinks in size
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plasmolysis
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What occurs whenever water moves into the cells causing them to cwell and burst.
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cytolosis
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What happens to a red blood cell placed in distilled water?
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Cells swell and burst (cytolosis)
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What happens to a red blood cell places in a concentrated salt solution?
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Cell shrinks and shrivels (plasmolysis)
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Draw a red blood cell in Hypotonic environment.
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(Draw picture)
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Draw a red blood cell in isotonic environment.
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(Draw Picture)
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Draw a red blood cell in hypertonic environment.
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(Draw Picture)
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Draw a plant cell in hypertonic environment
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(Draw picture)
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Draw a plant cell in hypotonic environment.
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(Draw picture)
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Draw a plant cell in isotonic environment
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(Draw picture)
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Plants prefer _________ environments.
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hypotonic
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Animal Cells do best in what type of environment?
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isotonic
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Describe simple diffusion
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Materials move down
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Describe facilitated diffusion
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The passage of materials is helped by the
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Describe active transport
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molecules move thre
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Passive transport does _______ require additional energy.
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NOT
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Passive transport moves materials from _______ to ______ concentration
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high, low
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Give 2 examples of passive transport in cells.
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Oxygen into the cell
Carbon dioxide moving out of the cell |
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_____ diffusion is a type of ______ transport because energy is NOT required
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facilitated, passive
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Is energy required in faciliated diffusion? Why
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No, because it is a type of passive transport
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Facilitated diffusion uses ______ proteins to help move materials from _____ to ____ concentrations.
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transport, high, low
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Name 2 materials that move into or out of cells by facilitate diffusion
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glucose and amino acids moving from blood into cells
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Name 2 types of transport proteing found in cell membranes
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?
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Describe channel proteins
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?
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How do carrier proteing help move materials across a cell membrane?
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they change shape
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Channel proteins have an opening or a ____ through which molecules can passively move by _______ diffusion
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pore, facilitated
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Do all carrier proteins extend across the cell membrane?
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no
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Explain how carrier proteins move materials across the membrane.
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?
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Some carrier proteins can change ____ to move materials across the cell membrane.
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shape
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What kind of transport requires additional energy to move materials?
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active transport
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Active transport uses cellular energy known as ________.
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ATP
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Active transport moves materilas AGAINST the concentration gradient or _____ to ____ concentration
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low, high
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Active transport moves materials _____ the concentration gradient.
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against
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The _____ pump is an example of active transport.
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sodium potassium
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Sodium potassium is an example of _______ transport.
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active
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Moving very large particles out of the cell is called _________.
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exocytosis
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In exocytosis, wates are moved out of the cell in ________ that fuse with the cell membrane
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vesicles
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_______ involves moving large particles into the cell.
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endocytosis
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Taking a large liquid droplet is called __________.
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??
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__________ _________ endocytosis involves protein _______ recognizing hormones to help move them into the cell.
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receptor ?______?
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How does cholesterol get into a cell
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receptors mediated endocytosis
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Cell eating is known as
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phosocytosis
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White blood cells engulfing bacteria is an example of _______________.
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phosocytosis
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____________ is the opposite exocytosis.
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endocytosis
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