Transport Mechanisms

Question 1

exists when there is a region of high concentration leading to a region of low concentration

Answer 1

Concentration gradient

Question 2

Is the substance that is being dissolved

Answer 2

Solute

Question 3

Dissolving medium

Answer 3

Solvent

Question 4

-High concentration to an area of low concentration
-relies on the random motion of molecules and does not require energy input from the cell
-it is a critical process for exchange of gases,nutrients and waste products
-Gaseous exchange in the lungs takes place in tiny air sacs called alveoli

Answer 4

Diffusion

Question 5

-The diffusion of water molecules across the cell membrane
-it plays crucial role in maintaining cell hydration and regulating osmotic pressure

Answer 5

Osmosis

Question 6

The capability of solution to modify the volume of cells by altering their water content

Answer 6

Solution tonicity

Question 7

facilitate
rapid transport, and their selectivity is primarily based on size.

Answer 7

Protein channels

Question 8

Undergoing conformational changes to transport the bound molecule to the other side.

Answer 8

Carrier proteins

Question 9

Moves water across the plasma membrane, or cell membrane.
The cell membrane has a limited permeability to water and thus aquaporins are necessary to move large amounts of water across the membrane.

Answer 9

Aquaporin

Question 10

Who won the nobel prize in chemistry for his 1992 discovery of aquaporin?

Answer 10

Peter Agre

Question 11

Requires the expenditure of energy to move ions or molecules.
Enabling cells to perform functions like nerve signaling, muscle contraction, and nutrient uptake.
Involves specialized membrane proteins, such as pumps and transporters, which actively transport specific substances across the cell membrane.

Answer 11

Active transport