Salmon Can Turn on Night Vision. Why Can’t We?

The video explores how salmon and other animals can see in the dark by adjusting their vision, unlike humans. It explains the biological and physical processes involved, focusing on the role of enzymes and vitamin A in altering pigments. The video also discusses experiments to enhance human vision using vitamin A2, highlighting the differences in vision across species.

Which animal is mentioned as having the ability to turn on night vision in their eyes?

• Owls

• Eagles

• Salmon

• Dogs

What is the primary function of photoreceptors in the eyes?

• To produce light

• To emit sound

• To absorb specific wavelengths of light

• To reflect light

How do salmon extend their vision into the infrared spectrum?

• By increasing their eye size

• By changing their eye pigments

• By using special lenses

• By using external devices

What is the role of the enzyme discussed in the video?

• To decrease light sensitivity

• To enhance color vision

• To produce vitamin C

• To convert vitamin A1 to vitamin A2

What was the outcome of the experiment with Pike liver on human vision?

• It had no effect on human vision

• It caused vision loss

• It slightly extended the visible spectrum

• It gave humans full night vision