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How We Get Our Skin Color

This animation describes how skin color is generated by skin cells as protection against ultraviolet (UV) radiation.

Cell Biology
Anatomy & Physiology
Animations
High School — General
High School — AP/IB
College
Cone Snail Toxins and Paralysis

This animation shows how cone snail toxins cause paralysis by blocking signal transmission at the synapse between neuron and muscle.

Cell Biology
Anatomy & Physiology
Animations
High School — AP/IB
College
Electrical Measurement of Muscle Activity

This video provides a demonstration of how nerve-muscle connectivity is measured.

Cell Biology
Anatomy & Physiology
Clips
High School — General
High School — AP/IB
College