High School / Biology

Membrane Permeability (pH sensor)

Students use a pH sensor to explore which substances can and cannot pass through a cell membrane model.

Supports NGSS Disciplinary Core Idea LS1.AThe cell membrane is represented by a semi-permeable dialysis tubing sac filled with a substance. Students will look for evidence to determine whether starch, iodine, or hydrogen ions are able to pass through the membrane. Students can detect non-visible H+ ion movement by observing changes in pH with a pH sensor, in addition to visible changes when starch and iodine come into contact with one another.


Student Files

EB2_Membrane_Permeability_S.docx 533.53 KB
EB2_Membrane_Permeability_S.pdf 369.64 KB
EB2_Membrane_Permeability_Google_Slides.pdf 30.06 KB

Teacher Files

Sign In to your PASCO account to access teacher files and sample data.

Watch Video

Membrane Permeability

Membrane Permeability

Sign In to your PASCO account to access teacher files and sample data.

Featured Equipment

Wireless Sensor Storage for Temperature, pH and Conductivity Sensors

Storage for Wireless Temperature, pH and Conductivity Sensors

Each tray can store up to 10 wireless sensors; sensors sold separately.

pH Sensor

Wireless pH Sensor

Here’s the best tool for measuring pH since litmus paper. The Wireless pH Sensor connects via Bluetooth® to monitor the pH of solutions.

Many lab activities can be conducted with our Wireless, PASPORT, or even ScienceWorkshop sensors and equipment. For assistance with substituting compatible instruments, contact PASCO Technical Support. We're here to help.

Copyright Disclaimer: Section 107 of the Copyright Act of 1976 makes allowance for “fair use” for purposes of teaching, scholarship, education and research. Reproduction under any other circumstances, without the written consent of PASCO, is prohibited.
Source: Lab #02

Essential Biology Teacher Lab Manual

Membrane Permeability (pH sensor)