OpenSciEd 7.3

What role does oxygen play in cellular respiration?

• Oxygen is used to convert glucose into energy.

• Oxygen is a waste product of cellular respiration.

• Oxygen is not involved in cellular respiration.

• Oxygen is used to break down proteins.

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What happens to carbon dioxide produced by cells?

• It is transported back to the lungs to be exhaled.

• It is converted into oxygen for use by the cells.

• It is stored in the liver for later use.

• It is expelled through the skin.

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How does blood function like a delivery truck in the body?

• Blood transports hormones to the brain.

• Blood brings food molecules and oxygen to cells and takes carbon dioxide and water away.

• Blood carries waste products to the kidneys for filtration.

• Blood delivers nutrients only to the heart.

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What is the relationship between starch and glucose?

• Starch is made up of many glucose molecules bonded together.

• Starch is a type of glucose.

• Glucose is a byproduct of starch digestion.

• Starch and glucose are unrelated compounds.

What are the air sacs in the lungs where gas exchange occurs?

• Bronchi

• Alveoli

• Trachea

• Larynx

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What is the primary function of alveoli in the respiratory system?

• To facilitate gas exchange between the air and the blood.

• To filter dust and particles from the air.

• To produce mucus for the respiratory tract.

• To regulate blood pressure in the lungs.

What is glucose?

• A simple sugar that is an important energy source for cells.

• A type of protein found in muscle tissue.

• A complex carbohydrate used for energy storage.

• A vitamin essential for metabolic processes.

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What is the difference between simple sugars and complex carbohydrates?

• Simple sugars are made of many sugar molecules linked together.

• Complex carbohydrates are single sugar molecules.

• Simple sugars are single sugar molecules, while complex carbohydrates are made of many sugar molecules linked together.

• Complex carbohydrates are primarily found in fruits.

What do our cells need to produce usable energy?

• Oxygen and glucose.

• Carbon dioxide and water.

• Nitrogen and proteins.

• Vitamins and minerals.

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What is the process of absorption in the digestive system?

• The breakdown of food into smaller components.

• The process by which nutrients from food are taken up into the bloodstream.

• The elimination of waste products from the body.

• The mechanical mixing of food in the stomach.