Why Do Birds Have White And Dark Meat? (And Do We?)

The video explains the differences between slow twitch and fast twitch muscle fibers in birds, highlighting their roles in endurance and quick bursts of activity. Slow twitch fibers, rich in myoglobin and mitochondria, are suited for long-distance flying, while fast twitch fibers rely on glycogen for short, intense actions. The video also compares muscle types across animals, noting that mammals have a mix of both fiber types, resulting in red meat. Fish generally have white meat due to less muscle use, except for species like tuna and salmon, which have darker meat due to constant swimming.

What is the primary function of slow twitch muscle fibers in birds?

• To produce lactic acid

• To enable quick bursts of speed

• To store glycogen for emergencies

• To support long-distance flying

Why do fast twitch muscles appear lighter in color?

• They contain more myoglobin

• They are used for endurance

• They are rich in mitochondria

• They lack pigmentation

Which type of bird is likely to have predominantly slow twitch muscles?

• Turkeys

• Pigeons

• Chickens

• Ducks

Why do some fish like tuna and salmon have darker meat?

• They are constantly swimming through currents

• They have a high concentration of fast twitch fibers

• They float and require less muscle power

• They store more glycogen

What is the reason for the pinkish color of human muscles?

• Presence of only slow twitch fibers

• Presence of only fast twitch fibers

• Combination of both slow and fast twitch fibers

• High levels of glycogen