Mechanical and Chemical Digestion

What is the role of the intestines in digestion?

• They only absorb nutrients from food.

• They push food down and absorb nutrients, playing a role in both mechanical and chemical digestion.

• They are responsible for the production of digestive enzymes only.

• They filter waste products from the blood.

Mechanical digestion is also known as?

• Chemical digestion

• Physical digestion

• Biological digestion

• Thermal digestion

What is peristalsis?

• A type of digestive enzyme

• The wave-like muscle contractions that move food through the digestive tract.

• A condition causing stomach cramps

• A method of food preservation

What is an example of chemical digestion in the stomach?

• The action of hydrochloric acid breaking down food.

• The mechanical grinding of food by teeth.

• The absorption of nutrients in the small intestine.

• The secretion of saliva by salivary glands.

What is an enzyme?

• A type of carbohydrate that provides energy to the body.

• A protein that speeds up chemical reactions in the body, including those involved in digestion.

• A lipid that stores energy and insulates the body.

• A nucleic acid that carries genetic information.

What is chemical digestion?

• The process of breaking down food into simpler molecules through chemical reactions, often involving enzymes.

• The mechanical process of chewing food into smaller pieces.

• The absorption of nutrients into the bloodstream after food is digested.

• The process of converting food into energy through metabolic reactions.

What is the function of chewing in digestion?

• Chewing increases the surface area of food, making it easier for enzymes to act during chemical digestion.

• Chewing breaks down food into smaller pieces for easier swallowing.

• Chewing helps to mix food with saliva for taste enhancement.

• Chewing is primarily for the mechanical breakdown of food without any chemical changes.

What role does saliva play in digestion?

• Saliva helps in the mechanical breakdown of food.

• Saliva contains enzymes that begin the chemical digestion of carbohydrates.

• Saliva neutralizes stomach acid before it enters the intestines.

• Saliva is primarily responsible for the absorption of nutrients.

What happens during chewing?

• Chewing is a form of mechanical digestion that breaks food into smaller pieces.

• Chewing is a process that adds chemical enzymes to food.

• Chewing is the process of swallowing food whole.

• Chewing is a method of cooking food before eating.

What is mechanical digestion?

• The process of chemically altering food to absorb nutrients.

• The physical process of breaking down food into smaller pieces without changing its chemical structure.

• The process of eliminating waste from the body after digestion.

• The method of storing food in the stomach for later use.