Bio Exam 2 (Chapter 7)

Question 1

What is the structure of the cell membrane?

Answer 1

fluid mosaics of lipids and proteins

Question 2

What is the function of the membrane?

Answer 2

exhibit selective permeability and maintenance of a steady state (homeostasis)

Question 3

What contain hydrophobic and hydrophilic parts?

Answer 3

Membrane proteins (amphipathic)

Question 4

What kind of membrane protein are bound to the surface of the membrane?

Answer 4

Peripheral protein

Question 5

What kind of membrane protein penetrate the hydrophobic core?

Answer 5

Integral proteins

Question 6

What requires no input of energy and may require transport proteins?

Answer 6

Passive Transport

Question 7

What is is the movement of particles of any substance so that they spread out evenly into the available space?

Answer 7

Diffusion

Question 8

What is the diffusion of water across membrane?

Answer 8

Osmosis

Question 9

What is the ability of a surrounding solution to cause a cell to gain or lose water?

Answer 9

Tonicity

Question 10

A solution is _____ if it solute concentration is the same as that inside the cell?

Answer 10

isotonic

Question 11

A solution is _______ if the solute concentration is greater than that inside the cell, cell will shrivel and lose water

Answer 11

hypertonic

Question 12

A solution is ______ if the solute concentration is less than that inside the cell, net diffusion of water is from the surrounding solution to the inside of the cell, cells without cell walls will burst

Answer 12

hypotnic

Question 13

When transport proteins speed the passive movement of molecules across the plasma membrane

Answer 13

Facilitated Diffusion

Question 14

What provides corridor that allow a specific molecule or ion to cross the membrane

Answer 14

Channel proteins

Question 15

What are channel proteins that facilitate the movement of water

Answer 15

Aquaporins

Question 16

What facilitate the transport of ions?

Answer 16

Ion channels

Question 17

requires energy and a transport protein

Answer 17

Active transport

Question 18

All proteins involved in active transport are what type of protein?

Answer 18

Carrier protein

Question 19

What is the voltage across a membrane?

Answer 19

Membrane potential

Question 20

What is the difference in charge of a membrane that consists of a chemical and electrical gradient?

Answer 20

Electrochemical gradient

Question 21

What transport protein that generates voltage across a membrane, storing energy that can be used for cellular work

Answer 21

Electrogenic pump

Question 22

Types of bulk transport?

Answer 22

Exocytosis or endocytosis

Question 23

In what bulk transport do transport vesicles migrate to the membrane, fuse with it, and release their contents outside the cell

Answer 23

Exocytosis

Question 24

In what bulk transport are macromolecules taken into the cell in vesicles

Answer 24

endocytosis

Question 25

Cellular eating?

Answer 25

Phagocytosis

Question 26

Cellular drinking

Answer 26

Pinocytosis