The pupillary light reflex

In strong light the pupil contracts, while in low light it dilates.

Relaterede ekstramaterialer

Making a tissue sample

Examination of the cells and stomas on the epidermis of a pelargonium at 100x magnification.

Modelling protein digestion in the stomach

Let’s simulate protein digestion in the stomach using a mixture of hydrochloric acid and pepsin.

Protein denaturation

Proteins are sensitive to environmental changes. In this video we demonstrate how easy it is to...

What are lichens made of?

A combination of fungal hyphae and algal cells viewed under a light microscope at a hundred...

Preparing a tissue sample from an onion

Examination of long, rectangular onion epidermal cells under the microscope at 100x magnification.

Studying adsorption

Purifying a solution coloured with fuchsine dye with finely ground activated carbon granules and...

The patellar reflex

When the patellar tendon is lightly tapped, the extensor muscle stretches slightly.

Substances in tobacco smoke

Don’t smoke! This video demonstrates what happens in the lungs when a person smokes.

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