Human Physiology

What is the function of saliva in digestion?

• It absorbs nutrients

• It chemically breaks down carbohydrates

• It prevents food from spoiling

• It transports food to the stomach

Which unit is used to measure energy in food?

• Joules

• Calories

• Watts

• Volts

What process moves food down the esophagus?

• Diffusion

• Peristalsis

• Absorption

• Filtration

Where does most nutrient absorption take place?

• Mouth

• Stomach

• Small intestine

• Large intestine

What do villi in the small intestine do?

• Produce stomach acid

• Absorb nutrients into the blood

• Break down proteins

• Store waste

Which organ filters waste from the blood?

• Lungs

• Liver

• Kidneys

• Skin

What is the main function of the large intestine?

• Digest carbohydrates

• Absorb excess water

• Store nutrients

• Produce enzymes

What is produced as a waste product of photosynthesis?

• Carbon dioxide

• Oxygen

• Glucose

• Water

How is glucose transported in plants?

• Through stomata

• By xylem

• By phloem

• Through roots

Which nutrient provides the most energy?

• Proteins

• Carbohydrates

• Fats

• Vitamins