Human Digestive System

What is the role of enzymes in the digestion of nutrients?

• Enzymes help in the synthesis of complex molecules from simpler forms.

• Enzymes break down complex molecules into simpler forms for absorption.

• Enzymes have no role in the digestion of nutrients.

• Enzymes convert nutrients into energy.

Name the process by which nutrients are absorbed into the bloodstream.

• diffusion

• excretion

• osmosis

• respiration

Tags

NGSS.MS-LS1-7

What is mechanical digestion and where does it occur in the digestive system?

• Mechanical digestion is the absorption of nutrients from food. It occurs in the small intestine.

• Mechanical digestion is the elimination of waste from the body. It occurs in the large intestine.

• Mechanical digestion is the chemical breakdown of food into smaller pieces. It occurs in the mouth and stomach.

• Mechanical digestion is the physical breakdown of food into smaller pieces. It occurs in the mouth and stomach.

Explain the process of chemical digestion in the human digestive system.

• Chemical digestion in the human digestive system is the process of breaking down food through physical grinding and chewing.

• Chemical digestion in the human digestive system is the process of breaking down food into smaller molecules through the action of enzymes.

• Chemical digestion in the human digestive system is the process of absorbing nutrients from food without breaking it down.

• Chemical digestion in the human digestive system is the process of converting food into energy through the action of bacteria.

Tags

NGSS.MS-LS1-7

What is the main role of the stomach in the digestion of nutrients?

• The main role of the stomach is to produce bile for digestion.

• The main role of the stomach is to store food and release it slowly into the small intestine.

• The main role of the stomach is to break down food and mix it with stomach acid and enzymes.

• The main role of the stomach is to absorb nutrients from the food.

Tags

NGSS.MS-LS1-7

Which enzyme is responsible for breaking down carbohydrates in the mouth?

• cellulase

• protease

• lipase

• amylase

Where does the absorption of nutrients primarily occur in the digestive system?

• large intestine

• small intestine

• stomach

• esophagus

What is the function of bile in the digestion of fats?

• Bile breaks down fats into glucose.

• Bile helps in the absorption of fats.

• Bile provides energy for the digestion of fats.

• Bile emulsifies fats.

Name the enzyme responsible for breaking down of proteins.

• amylase

• protease

• lipase

• maltase

Explain the process of peristalsis in the digestive system.

• Peristalsis is the process of voluntary muscle contractions that move food through the digestive system.

• Peristalsis is the process of breaking down food in the digestive system.

• Peristalsis is the process of involuntary muscle contractions that move food through the digestive system.

• Peristalsis is the process of absorbing nutrients in the digestive system.