Lecture 2: Osmosis, Tonicity, and Pressures

Question 1

What is osmosis?

Answer 1

The flow of water across a semipermeable membrane due to differences in solute concentration (remember the membrane blocks the movement of solute)

Question 2

Concentration difference of solutes causes a difference in __________ ___________, which will cause ___________.

Answer 2

Osmotic pressure
Osmosis

Question 3

Osmotic pressure is created by what?

Answer 3

A difference in solute concentration across a semipermeable membrane
(the side of a membrane with a greater number of solutes that cant move will have a greater osmotic pressure, meaning water will be pulled over to that side of the membrane)

Question 4

What is hydrostatic pressure?

Answer 4

The pressure exerted bu a stationary fluid, the more fluid you have in a container, the greater the hydrostatic pressure you have

Question 5

Why is osmotic and hydrostatic pressures important in cells and blood vessels?

Answer 5

They allow fluid exchange across capillaries