Quiz

Question 1

Communication between the nucleus and cytosol occurs through

Answer 1

nuclear pores

Question 2

The more metabolically active a cell is, the more ________ it’s membrane contains.

Answer 2

protein

Question 3

The lumen of a hollow organ such as the stomach is considered to be part of the ________ environment.

Answer 3

external

Question 4

When cancer develops in one tissue and spreads to another via the blood or the lymph, the cancer is said to have undergone what process?

Answer 4

metastasis

Question 5

________ proteins attach loosely to other membrane proteins or polar regions of phospholipids.

Answer 5

Peripheral

Question 6

Which cytoskeletal protein allows for intracellular transport of organelles?

Answer 6

Tubulin

Question 7

The cellular organelle(s) responsible for packaging and transporting proteins is/are the

Answer 7

Golgi complex

Question 8

Ribosomal RNA is formed by

Answer 8

nucleoli

Question 9

? direct the movement of DNA during cell division

Answer 9

Centrioles

Question 10

consists of a network of intracellular membranes with attached ribosomes

Answer 10

rough endoplasmic reticulum

Question 11

lysosomes digest ? and ?

Answer 11

cellular wastes and bacteria

Question 12

use an enzyme to destroy H2O2 that is toxic to the cell

Answer 12

Peroxisomes

Question 13

What moves the fluid medium across the surface of cells that are not free to move?

Answer 13

cilia

Question 14

Stratified squamous is a structural epithelium type that would be expected for ________.

Answer 14

skin

Question 15

Which type of connective tissue is unusual in having relatively little extracellular matrix?

Answer 15

Adipose

Question 16

Loose connective tissue functions in

Answer 16

supporting small glands

Question 17

If an animal cell lacked centrioles, it would not be able to

Answer 17

undergo nuclear division

Question 18

The tissue(s) that is/are considered excitable because of the ability to generate electrical signals is/are called

Answer 18

muscle tissue and neural tissue

Question 19

What is a nonpenetrating (NP) solute?

Answer 19

A solute that will not cross the cell membrane.

Question 20

Which body fluid compartment contains high levels of K+, large anions, and proteins?

Answer 20

intracellular fluid only

Question 21

Which body fluid compartment contains higher levels of Na+, Cl-, and HCO3-?

Answer 21

both plasma and interstitial fluid

Question 22

Water will always move from ________ areas to ________ areas, if there are no impermeable barriers.

Answer 22

hyposmotic, hyperosmotic

Question 23

Which type of molecular movement requires energy from ATP?

Answer 23

Active transport

Question 24

Saturation occurs when

Answer 24

a group of carrier proteins is operating at its maximum rate.

Question 25

statements about the Na+/K+ pump

Answer 25

It is present in neurons. It transports Na+ out of the cell and K+ into the cell. Its activity requires the expenditure of metabolic (cellular) energy.

Question 26

Hyposmotic solutions have lower

Answer 26

concentrations of solutes than hyperosmotic solutions.

Question 27

Facilitated diffusion and active transport differ in that

Answer 27

ATP is necessary for active transport, but not for facilitated diffusion.

Question 28

According to Fick's law of diffusion, diffusion rate is proportional to the surface area of the membrane, the concentration gradient, and which other variable?

Answer 28

The permeability of the membrane

Question 29

If a 10% sucrose solution is separated from a 20% sucrose solution by a membrane impermeable to sucrose, in which direction will net movement of water occur?

Answer 29

from the 10% sucrose solution to the 20% sucrose solution only

Question 30

Membrane protein pores that are essentially always open are called ________ channels.

Answer 30

leak or open

Question 31

What process requires clathrin to form coated pits?

Answer 31

Receptor-mediated endocytosis

Question 32

Compared to the outside surface, the inside of a resting cell membrane is

Answer 32

negatively charged.

Question 33

As the charge on the membrane of a typical neuron approaches 0 from -70 mV, the cell is

Answer 33

only depolarizing.