Human Nutrition Quiz

Steps of Human Nutrition

• Main steps include ingestion, digestion, absorption, assimilation, and egestion.

Major Organs and Functions

• The liver is the largest gland in the human body.
• The stomach secretes hydrochloric acid and digestive juices to break down food.
• Villi are finger-like projections in the inner wall of the small intestine, crucial for absorbing digested food.

Digestion Processes

• Amoeba digests food within food vacuoles.
• Digestion of starch does not commence in the stomach.

Functions of Various Structures

• The tongue aids in mixing food with saliva.
• The gallbladder serves as a temporary storage for bile.
• Ruminants can regurgitate swallowed food for further chewing.

Location of Digestion

• Fat is fully digested in the small intestine.
• Water absorption from undigested food primarily occurs in the large intestine.

Villi: Structure and Role

• Villi are located in the small intestine and facilitate the absorption of digested nutrients.

Bile Production and Function

• Bile is produced in the liver and assists in fat digestion.

Carbohydrate Digestion in Ruminants vs. Humans

• Ruminants can digest cellulose due to a specialized sac-like structure containing bacteria, absent in humans.

Instant Energy from Glucose

• Glucose provides immediate energy because it is a simple sugar that bypasses the digestion process and directly enters cells.

Digestive Canal Functions

• Absorption of food occurs in the small intestine.
• Chewing of food happens in the buccal cavity.
• The stomach is essential for killing bacteria.
• Complete digestion also occurs in the small intestine.
• Formation of feces occurs in the large intestine.

Nutrition in Amoeba vs. Humans

• Similarity: Both demonstrate holozoic nutrition.
• Difference: Humans have a complex digestive system, while amoeba relies on a simpler process using pseudopodia to engulf food.

Labeling and Matching Tasks

• Additional matching exercises and diagrams related to the digestive system are included for revision purposes.