Gas Exchange In Plants

Question 1

Gills

Answer 1

made up of gill filaments and lamellae (tiny, thin plates that increase the surface area for gas exchange)

Question 2

How gas exchange works in fish

Answer 2

Water flows over the gills, and oxygen diffuses from the water into the blood in the lamellae

Question 3

Countercurrent flow

Answer 3

Blood and water flow in opposite directions across the lamellae, which maintains a concentration gradient and maximizes oxygen uptake.

Question 4

Diffusion

Answer 4

Net movement of mol from region of higher conc to lower conc down a conc gradient until equilibrium is reached.

Question 5

Facilitated diffusion

Answer 5

diffusion that takes place through protein channels.

Question 6

Osmosis

Answer 6

Net movement of mol from region of higher water potential to lower water potential across a partially permeable membrane, down the water potential gradient.