Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chapter 4 Exam
| Question | Answer |
|---|---|
| Cells often engulf extracellular particles and fluid, as shown in figure A. This is called ___________ | Endocytosis` |
| The process shown in figure B is called ___________ | Exocytosis |
| Carrier proteins _________ shape to transport to the interior of cells | change |
| Active transport requires the use of _______, by a cell | energy |
| Receptor proteins may act as ___________, catalyzing certain chemical reactions inside the cell | Enzymes |
| Differson of ions through ion channels is a form of _________ transport | pass |
| A cell does not expand ________ when diffusion takes place | energy |
| Receptor proteins can change the __________ of the cell membrane | permiability |
| The diffusion of __________ through cell membranes is called osmosis | water |
| Substances always flow from an area of high concentration to an area of ______ concentration | low |
| When the concentration of free water molecules is higher outside a cell, water will diffuse ______ the cell | into |
| If the interior of a typical cell is negatively charged __________ charged ions will not require energy to diffuse into the cell using an ion channel | positively |
| In ____________ ____________ , carrier proteins do not require energy to transport amino acids into a cell | facilitated diffusion |
| The random motion of particles of a substance that causes the substance to move from an area of high concentration to an area of lower concentration is called ___________ | diffusion |
| The biologist concludes that the molecule moves across cell membranes by facilitated diffusion. Do you agree with his conclusion? Why or why not? | Dissagree. The molecule is moving from low to high concentration...energy is being used |
| How can you explain the observed relationship between salt concentration and rate of contractile vacoule concentraction? | Contractive vacuole remove excess water from the cell |
| If something happened to a paramecium that caused its contractile vacuole to stop contracting what would you expect to happen? Would this result occur more quickly if the paramecium was in water with a high salt concentration? Why? | The puramecium would burst. This would ocur in low salt concentration. Because the water concentration is higher on the outside of the cell, so the water will go from high(outside) to low(inside) |
| Why is it dangerous for humans to drink sea water? | Increase salt concentration in the blood stream. This causes the concentration on gradient to be higher in the cell. Thus the cell will lose water and dehydration |
| Which of the following does NOT require energy A.Diffusion C.Active Transport B.Endocytosis D.Sodium-potassium pump | A.Diffusion |
| The sodium-potassium pump usually pumps A.potassium ions out of the cell B.sodium ions into the cell C.potassium ions into the cell D.only potassium ions and sugar molecules | C.potassium ions into the cell |
| Ion channels gates close the pores of some ion channels in response to... A.streching of the cell membrane B.A change in electrical charge C.the binding of specific molecules to the channel D.all of the above | D.all of the above |
| Ridding the cell of materials by discharging the materials in vesicles is called... A.osmosis C.exocytosis B.diffusion D.endocytosis | C. exocytosis |
| Sugar molecules can enter cells through the process of... A.exocytosis C.osmosis B.facilitated diffusion D.ion pumps | B.facilitated diffusion |
| Proteins and polysaccharides that are too large to move into a cell through diffusion or active transport move in by... A.exocytosis C.the sodium-potassium pump B.endocytosis D.none of the above | B.endocytosis |
| Unlike passive transport, active transport... A.requires energy B.moves substances down their concentration gradient C.does not involve carrier proteins D.all of the above | A.requires energy |
| Transport proteins that allow ions to pass through the cell membrane are called... A.receptor proteins C.ions channels B.marker proteins D.none of the above | C.ion channels |
| Sugar molecules cross the cell membrane by... A.active transport C,osmosis B.facilitated diffusion D. gated channels | B.facilitated diffusion |
| Which of the following transmit information into a cell by binding to signal molecules? A.channel proteins C.marker proteins B.receptor proteins D.end proteins | B.receptor proteins |
| When a signal molecule binds to a receptor protein, the receptor protein may... A.change the permeability of the membrane B.cause the formation of the a second messenger molecule C.catalyze certain chemical reactions in the cell D.all of the above | D.all of the above |
| A cell will swell when it is placed in a(n) A.hypotonic solution C.isotonic solution B. hypertonic solution D.none of the above | A.hypotonic solution |
| The sodium-potassium pump A.increases the concentration of sodium ion inside a cell B.decreases the concentration of potassium ions inside a cell C.increases the concentration of potassium ions inside a cell D.both (B) and (C) | D.both (B) and (C) |
| The interior portion of a cell membrane forms a nonpolar zone that A.allows polar molecules to pass through the membrane B.allows food to pass through the membrane C.prevents ions and most large molecules from passing through the membrane D.none of th | C.prevents ions and most large molecules from passing through the membrane |
| Proteins that act like selective passage ways in the cell membrane are known as... A.marker proteins C.receptor proteins B.channel proteins D.none of the above | B.channel proteins |
| Both active transport and facilitated diffusion involve... A.ATP B.movement against a concentration gradient C.carrier proteins D.all of the above | C.carrier proteins |
| Signal molecules bind to... A.carbohydrates C.receptor proteins B.marker proteins D.transport proteins | C.receptor proteins |
| Osmosis is a type of... A.active transport C.facilitated diffusion B.passive transport D.endocytosis | B.passive transport |
| As a result of diffusion, the concentration of many types of substances... A.always remains greater inside a membrane B.eventually becomes balanced on both sides of a membrane C.always remains greater outside of a membrane D.becomes imbalanced on bo | B.eventually becomes balanced on both sides of a membrane |
| Which part of the following is a form of active transport? A.osmosis C.facilitated diffusion B.diffusion D.sodium-potassium pump | D.sodium-potassium pump |
| What happens when the structure labeled A binds to the structure labeled B? A.information is sent into the cell B.proteins enter the cell C.the cell begins to undergo mitosis D.none of the above | A.information is sent into the cell |
| IONS move through ion channels by... A.endocytosis C.passive transport B.diffusion D.active transport | C.passive transport |
| The diffusion of water into or out of a cell is called... A.solubility C.selective transport B.osmosis D.endocytosis | B.osmosis |
Created by:
Jaden_J_Weems
Popular Biology sets