Importance of diffusion

Question 1

Fish system (1st)

Answer 1

• Diffusion of O2, concentration gradient using counter current flow
• Oxygen is terminal acceptor for oxidative phosphorylation
• Important for ATP production (metabolism in cells)

Question 2

Respiration (2nd)

Answer 2

• Chemiosmosis (down ATP synthase)
• Produces ATP, used in active transport
• Failure can cause mitochondrial diseases

Question 3

Muscle contraction

Answer 3

• DIffusion of calcium ions
• Uses ATP for actin/myosin
• Movement for survival

Question 4

Synapse

Answer 4

• Diffusion across synapse
• Creates AP for muscle movement
• Failure can cause diseases (Alzheimer’s)

Question 5

Absorption

Answer 5

• Diffusion of sodium ions in
• Facilitated diffusion out of epithelium
• Needs for reabsorption (glucose can cause diabetes)