Week 2- Water Balance, Blood & Immunology

Question 1

Define cell membrane

Answer 1

Selective barrier between ECF and ICF, also binding sites for receptorss

Question 2

What are aquaporins?

Answer 2

Channels that allow water to move freely

Question 3

What molecules move freely between compartments?

Answer 3

Waste products, gases, nutrients

Question 4

Explain ion distribution

Answer 4

Ions move freezing across capillary wall ( Plamsa & ISF), e.g high Na in ECF & high K in the ICF

Question 5

Describe the cell membrane structure

Answer 5

Made of a phospholipid belayer which is amphipathic, contains channel proteins

Question 6

Discuss electrochemical gradient

Answer 6

Ions are charged and the spread/ distribution of these ions creates an electrochemical gradient. Molecules moving down this gradient is passive transport, molecules moving up it requires energy and is active transport