Life Science

Programming Exercise: Voyager Light Sensor Drives a Scratch Program of the Eye

Submitted by Rich on Sun, 12/10/2017 - 22:01

The eye is one of the many marvels of the human body.  The colored iris of the eye, surrounding the pupil, acts as a diaphragm to keep the amount of light entering the eye fairly constant.  If you walk out the door of your house to a sunny yard, the iris opening gets smaller letting less light into your eye.  If you enter a dark room after watching your favorite television program, the iris gets larger to allow more light to enter your eye.  This is a protective reflex, as too much light could damage the retina, which is where the image forms in the eye, similar to the film of a traditional

A Respiration Study with Voyager and Scratch Programming

Submitted by Rich on Wed, 12/06/2017 - 20:13

This lesson is motivated by a respiration study using a FLIR ONE™ thermal camera in conjunction with the Vernier Thermal Analysis Plus app. Using Voyager and the PocketLab Temperature Probe, however, allows students to investigate respiration at a fraction of the cost of a thermal camera. The response time for the Temperature Probe is rapid enough to observe temperature differences in the air inhaled and exhaled through the mouth during the process of respiration.

Measuring Forced Vital Capacity with PocketLab Spirometer

Submitted by PocketLab on Fri, 06/02/2017 - 16:53

Exploration

A spirometer is an apparatus often used in the medical field to find the cause of shortness of breath. A spirometer can rule out lung diseases like asthma, bronchitis, and emphysema. A spirometer can measure forced vital capacity. Forced vital capacity is the amount of air exhaled during a forced breath. Explore what factors affect forced vital capacity.

Objective