Chapter 3 the cell

Question 1

Identify the function of a marker protein.

Answer 1

Allows for cellular identification

Question 1

Identify the two types of molecules that form the majority of the plasma membrane.

Answer 1

proteins and phospholipids

Question 2

Specificity

Answer 2

A transport protein will only bind to and transport a certain type of substance.

Question 3

Saturation

Answer 3

Rate of movement of molecules across the membrane is limited by the available transport proteins.

Question 4

Competition

Answer 4

Substances with similar shapes may bind to the same transport molecule.

Question 5

The transmembrane proteins with pores without gates that allow ions to pass through the membrane are called ion

Answer 5

Leak channels

Question 6

Identify functions of attachment proteins. They attach

Answer 6

cells to extracellular material

one cell to another cell

Question 7

Transport proteins are Blank______ proteins.

Answer 7

integral

Question 8

Ligand-regulated gates respond to

Answer 8

chemical signals

Question 9

Identify the types of substances that require vesicles for transport across the cell membrane.

Answer 9

Non-lipid soluble molecules

Small pieces of matter

Large molecules

Question 10

Diffusion, osmosis and facilitated diffusion are all examples of

Answer 10

active transport

Question 11

Endocytosis is an example of

Answer 11

vesicular transport

Question 12

Diffusion rate will increase as the size of the molecule

Answer 12

decreases

Question 13

Oxygen levels in inhaled air in the lungs is much higher than oxygen levels in the capillary blood. Capillary blood has a much higher concentration of carbon dioxide than air in the lungs. Predict what will happen?

Answer 13

Oxygen will diffuse into the capillaries.

Question 14

The measurement of a fluid’s resistance to flow is referred to as its

Answer 14

Blank 1: viscosity or fluidity

Question 15

The amount of pressure exerted on one side of a selectively permeable membrane to stop osmosis is known as
?

Answer 15

Osmotic pressure

Question 16

The sugar concentration in your glass of ice tea is very high at the bottom and low at the top. This concentration distribution is an example of a(n)

Answer 16

concentration gradient

Question 17

Secondary active transport in the intestine works by

Answer 17

carrier mediated transport of sodium into the cell

carrier mediated transport of glucose into the cells

active transport of sodium out of the cell

Question 18

Pinocytosis and phagocytosis are both forms of

Answer 18

endocytosis

Question 19

The movement of solutes through a membrane by a carrier that uses a concentration gradient created by an active transport mechanism is called

Answer 19

secondary active transport

Question 20

The cytoskeleton is composed of

Answer 20

actin (intermediate) filaments

microtubules

Question 21

The cytoskeleton is composed of

Answer 21

actin (intermediate) filaments

microtubules

Question 22

Which organelle is responsible for modifying and packaging newly synthesized proteins?

Answer 22

Golgi apparatus

Question 23

What is a proteasome?

Answer 23

A barrel-like structure in the cell that breaks down and recycles proteins

Question 24

Lysosomes form at the Blank______.

Answer 24

golgi ap

Question 25

What is a centriole?

Answer 25

A small cylindrical organelle composed of microtubules

Question 26

Extensions of the plasma membrane that serve primarily to increase a cell’s surface area are called

Answer 26

microvilli

Question 27

what is a lysosome

Answer 27

An organelle that contains hydrolytic enzymes and functions in intracellular digestion