Osmolality & Osmolarity & Tonicity (ORAL SCIENCE)

Question 1

Define: Osmolality & Osmolarity

Answer 1

Definition: Measurements of the solute concentrations of a solution Body fluids like (Urine, plasma etc)

Question 2

Explain Osmolality

Answer 2

proportional to the number of particles (solute) per kilogram of solvent -Expressed as mOsmol/kg

Question 3

Explain Osmolarity

Answer 3

-Expressed as mOsmol/L Normal plasma osmolarity = 280–300 mosm/kg (constant) Normal urine osmolarity = 50-1200 mosm/Kg (variable)

Question 4

Explain Tonicity

Answer 4

Tonicity
Effect of a solution on movement of water
* Not the same as osmolarity/osmolality
* Comparative term and has no units

Question 5

What are the 3 types of solutions (tonicity)

Answer 5

Hypertonic solution, Hypotonic solution, Isotonic solutions

Question 6

Explain: Hypertonic solution

Answer 6

A hypertonic solution has a higher concentration of dissolved particles (solutes) than the inside of a cell.
Solution that has a higher solute concentration

Question 7

Explain: Hypotonic solution

Answer 7

A hypotonic solution is a solution that has a lower concentration of dissolved particles (solutes) than the inside of a cell.
Solution that has a lower solute concentration

Question 8

Explain: Isotonic solutions

Answer 8

An isotonic solution is a solution that has the same concentration of dissolved particles (solutes) as the inside of a cell.
Solutions that have the same solute concentrations

Question 9

What are electrolytes

Answer 9

Electrolytes - generate electricity ( charged particles )

Question 10

Types of Ions

Answer 10

Cat ions - positive charge
An ions - negative charge