FREE AND STUDY GAMES ABOUT PHYS CH. 4 EXAM

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FREE AND STUDY GAMES ABOUT PHYS CH. 4 EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -51 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: The 'coating of sugar' on the cell's surface is called the __.

Answer:

glycocalyx

Question 2: A form of endocytosis by which cells ingest liquid.

Answer:

pinocytosis

Question 3: Which substance moves most easily across the phospholipid bilayer?

Answer:

fatty acids

Question 4: What are found in the cell membrane?

Answer:

phospholipids, transport proteins, cholesterol

Question 5: __ __ opposes the movement of solutes by diffusion and prevents the distribution of dissolved substances from reaching equilibrium. A solute is moved across a plasma membrane against a concentration gradient during this process.

Answer:

active transport Question 6: __ pump can be thought of as a "dual pump." The plasma membrane preserves steep concentration gradient differences for these ions by continuously exporting Na+ out of the cell and moving K+ into the cell.

Answer:

Na+/K+ Question 7: In passive transport processes, materials flow from a region of __ concentration of the material to a region of __ concentration of the same material.

Answer:

higher, lower Question 8: Active transport proteins that move ions across the membrane are called __ __.

Answer:

ion pumps

Question 9: __ proteins are not embedded in the phospholipid bilayer.

Answer:

peripheral Question 10: All materials that enter or leave the cell must pass across the __ __.

Answer:

plasma membrane

Question 11: What are some statements that describe enzymes?

Answer:

they are proteins; they're important for metabolic activities of a cell; they are catalysts

Question 12: The addition of the phosphate to a protein is called __.

Answer:

phosphorylation Question 13: If the inside of a cell has a net negative charge, which type of extracellular ion will be most attracted to the intracellular environment?

Answer:

a positively charged ion Question 14: Ligands are molecules released from one cell that bind to the receptor of another cell. What are the types of receptors that can bind ligands?

Answer:

channel-linked, enzymatic, G protein-coupled

Question 15: Osmosis is a type of __.

Answer:

diffusion Question 16: Immune system cells differentiate healthy vs. unhealthy cells in the body by examining what part of the cell?

Answer:

glycocalyx Question 17: Some membrane proteins are __ that change the rates of some metabolic reactions.

Answer:

catalysts Question 18: Because of the structure of the phospholipid bilayer, which molecules pass easily through it?

Answer:

lipid molecules

Question 19: __ transport is also called bulk transport. It involves energy input to transport large materials across the plasma membrane by a __ which is a membrane-bounded sac filled with materials. It is organized into processes of exocytosis and endocytosis.

Answer:

vesicular, vesicle

Question 20: Sodium ions move into the cell through __-mediated diffusion.

Answer:

channel Question 21: Some membrane proteins catalyze (speed up) the rate of metabolic reactions.These proteins are acting as __.

Answer:

enzymes Question 22: The steeper the concentration gradient of a solute, the lower the osmotic pressure.T or F?

Answer:

false Question 23: In active transport processes, materials often flow from a region of __ concentration of the material to a region of __ concentration of the same material.

Answer:

lower, higher Question 24: The means by which either large substances or large amounts of substances are secreted from the cell is called __.

Answer:

exocytosis Question 25: One of the main factors that influences membrane permeability is __ __.

Answer:

molecular size