Passive Transport: Osmosis

Objectives

• Observe the relationship between diffusion and solute size

• Observe the passage of water through semi-permeable membranes through osmosis

• Observe and analyze the changes that occur in plant tissues incubated at hypotonic, hypertonic, and isotonic solutions

• Observe and assess the effect of water potential on osmosis and calculate the concentration and water potential of plant tissue

Curriculum alignment

• NGSS

LS1-2 Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.

• AP

2.6 Membrane Transport

2.7 Facilitated Diffusion

2.8 Tonicity and Osmoregulation

• IB DP

1.4 Estimation of osmolarity in tissues by bathing samples in hypotoni and hypertonic solutions.

• Cambridge GCSE 

3.1 Diffusion

3.2 Osmosis

4.2 Movement into and out of cells

• Cambridge AS & A Level 

4.2 Movement into and out of cells

• Categories: Biology Laboratory