Exploring Animal Nutrition

What is the primary function of the human digestive system?

• To regulate body temperature.

• To filter toxins from the blood.

• To break down food and absorb nutrients.

• To provide energy for physical activity.

Name the main organs involved in human digestion.

• lungs

• Mouth, esophagus, stomach, small intestine, large intestine, liver, pancreas, gallbladder

• kidneys

• heart

What is the process of breaking down food into smaller molecules called?

• Absorption

• Metabolism

• Digestion

• Fermentation

How do humans primarily take in food?

• Through the nose by sniffing

• By inhaling food particles into the lungs

• Through the mouth by chewing and swallowing.

• By absorbing nutrients through the skin

What role do enzymes play in digestion?

• Enzymes prevent the breakdown of food and keep it intact during digestion.

• Enzymes are responsible for absorbing nutrients directly into the bloodstream.

• Enzymes act as a source of energy for the body during digestion.

• Enzymes facilitate the breakdown of food into absorbable nutrients during digestion.

Describe the difference between mechanical and chemical digestion.

• Mechanical digestion involves chemical reactions, while chemical digestion is purely physical.

• Mechanical digestion is the physical breakdown of food, while chemical digestion is the enzymatic breakdown of food.

• Mechanical digestion occurs in the stomach, while chemical digestion happens in the mouth.

• Mechanical digestion is faster than chemical digestion, which takes longer to break down food.

What is the significance of the stomach in human digestion?

• The stomach is significant in human digestion as it breaks down food mechanically and chemically, facilitating nutrient absorption.

• The stomach primarily stores food without any digestion.

• The stomach is responsible for producing insulin for blood sugar regulation.

• The stomach absorbs most nutrients directly into the bloodstream.

How do herbivores differ from carnivores in their digestive processes?

• Carnivores primarily digest cellulose, while herbivores focus on protein breakdown.

• Herbivores have shorter intestines for faster digestion, while carnivores have longer intestines for nutrient absorption.

• Herbivores have a single-chambered stomach, while carnivores have multi-chambered stomachs.

• Herbivores have complex, multi-chambered stomachs for cellulose digestion, while carnivores have simpler, shorter digestive tracts for protein digestion.

What adaptations do grass-eating animals have for digestion?

• Sharp claws for tearing flesh

• Adaptations include specialized teeth, longer digestive tracts, complex stomachs, and symbiotic gut bacteria.

• Short digestive tracts for quick processing

• Ability to fly to find food

Explain the term 'rumination' in relation to grass-eating animals.

• A method of storing food for later consumption.

• The process of digesting food without any chewing.

• Rumination is the process of re-chewing food in ruminants to aid digestion.

• The act of grazing on grass without chewing.