Understanding Marine Life and Immune Systems

The video explores the mysterious deaths of dolphins in 2012, linking them to the morbillivirus, which affects their immune system and behavior. It then examines the robust immune system of sharks, focusing on their skin's dermal denticles and the liver-produced compound squalamine, which prevents viral infections. The video suggests that sharks are highly disease-resistant, making it unlikely they were affected by a virus or bacteria.

What was the primary cause of the dolphin deaths in 2013?

• Pollution

• Climate change

• Morbillivirus

• Shark attacks

How did the morbillivirus affect the dolphins' behavior?

• Made them avoid humans

• Increased their appetite

• Caused them to swim in strange patterns

• Made them more aggressive

What hypothesis was considered regarding the sharks' behavior in 2012?

• They were affected by a disease

• They were migrating

• They were hunting in groups

• They were avoiding predators

What is the primary function of dermal denticles in sharks?

• To protect against predators

• To help them swim faster

• To prevent bacterial infections

• To attract mates

What makes it difficult for bacteria to adhere to shark skin?

• Chemical secretions

• High temperature

• Uneven shape of dermal denticles

• Smooth surface

What compound does the shark's liver produce to fight diseases?

• Hemoglobin

• Squalamine

• Chlorophyll

• Adrenaline

How does squalamine help sharks resist viral infections?

• By reducing stress

• By enhancing blood flow

• By preventing virus multiplication

• By increasing body temperature

What potential human medical application is being tested with squalamine?

• Treating diabetes

• Fighting cancer

• Curing allergies

• Improving vision

Why are sharks considered highly disease-resistant?

• They have a short lifespan

• They live in clean waters

• They have a strong immune system

• They are solitary creatures

What is the likelihood of sharks becoming ill due to a virus or bacterial infection?

• Certain

• Somewhat likely

• Unlikely

• Very likely