The video explains the digestion process, starting with the nutrients in a burger and how they are broken down mechanically and chemically in the human body. It also covers external digestion in other organisms like fungi and houseflies. The video highlights the role of bacteria in human digestion and the time it takes for food to be fully digested.

What nutrients are found in the meat and cheese of the burger?

• Water and electrolytes

• Vitamins and minerals

• Protein and fats

• Carbohydrates and fiber

What is the main purpose of digestion?

• To make food taste better

• To break down food to make it soluble in the blood

• To store food for later use

• To eliminate waste from the body

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NGSS.MS-LS1-7

Which enzyme in saliva helps break down starch molecules?

• Amylase

• Lipase

• Protease

• Pepsin

Tags

NGSS.MS-LS1-7

What is the smaller molecule that starch is broken down into?

• Maltose

• Lactose

• Fructose

• Glucose

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NGSS.MS-LS1-7

How long does it take for food to pass through the stomach and small intestine?

• 8-10 hours

• 6-8 hours

• 4-6 hours

• 2-4 hours

What type of digestion do humans carry out?

• No digestion

• Both internal and external digestion

• External digestion

• Internal digestion

What are fungi that secrete enzymes onto food called?

• Phototrophs

• Saprotrophs

• Heterotrophs

• Autotrophs

How do houseflies digest their food?

• By chewing it

• By secreting a solvent onto the food and then sucking up the nutrients

• By using their legs to break it down

• By swallowing it whole

What is the role of bacteria in human digestion?

• They eliminate waste from the body

• They store nutrients for later use

• They cause food poisoning

• They help break down certain foods, make vitamins, and assist with the immune system

How many bacteria are estimated to live inside our guts?

• 100 trillion

• 1 trillion

• 1 billion

• 1 million

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4