Biology-Concerntrations and osmosis

Question 1

Define

Osimosis

Answer 1

Osmosis is the movement of water molecules across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Question 2

Define

Semipermanable membrane

Answer 2

A semipermeable membrane is a barrier that allows certain molecules or ions to pass through it by diffusion and occasionally by specialized “facilitated diffusion.”

Question 3

Key factors of

Osimosis

Answer 3

The key factors are solute concentration, pressure, and temperature.

Question 4

Define

Hypertonic solution

Answer 4

A hypertonic solution has a higher concentration of solutes compared to the inside of a cell, causing the cell to lose water and shrink.

Question 5

Define

Hypotonic solution

Answer 5

A hypotonic solution has a lower concentration of solutes compared to the inside of a cell, causing the cell to absorb water and swell.

Question 6

Define

Isotonic solution

Answer 6

An isotonic solution has the same concentration of solutes as the inside of a cell, resulting in no net movement of water into or out of the cell.

Question 7

How is osmosis important in biological systems?

Answer 7

Osmosis is crucial for maintaining cell turgor pressure, transporting nutrients and waste products, and regulating fluid balance in living organisms.

Question 8

Define

Concentration

Answer 8

Concentration refers to the amount of a substance (solute) present in a given volume of solution.

Question 9

Formula

Concerntration

Answer 9

𝐶=

massofsolute/
volumeofsolution

Question 10

Define

Molarity

Answer 10

Molarity (M) is a measure of concentration, expressed as the number of moles of solute per liter of solution.