The Digestive System biop1 organisation Practice Quiz (15 questions)

Explanation

A tissue consists of cells with similar structure and function. The tissues answer describes an organ, the location answer omits shared function, and the organs answer describes an organ system.

Explanation

An organ is made of different tissues working together for a specific function. A tissue is a group of similar cells, while an organ system consists of organs working together.

Explanation

An organ system is a group of organs that work together to form an organism. A tissue is made of cells, and an organ is a group of tissues working together.

Explanation

The three main nutrients listed are carbohydrates, protein and lipids, also called fats. Water, vitamins and minerals are substitutions for nutrients in that set.

Explanation

Carbohydrates, proteins and lipids are large molecules, so they must be digested before they can be absorbed into the bloodstream. The intact-absorption answer overlooks their size, while transport to the large intestine and conversion to energy are not the required first steps.

Explanation

Digestion uses enzymes to break large food molecules into smaller molecules, which can then be absorbed into the bloodstream. Rebuilding reverses the process, and enzymes break molecules down rather than transporting them.

Explanation

Salivary enzymes begin digesting starch into smaller sugar molecules, while chewing breaks food into smaller pieces. Protein digestion begins in the stomach, hydrochloric acid acts there, and absorption into the bloodstream occurs in the small intestine.

Explanation

Hydrochloric acid in the stomach helps enzymes digest proteins, so reduced acid most directly disrupts that support. Saliva begins starch digestion, lipid digestion begins in the small intestine, and absorption occurs there.

Explanation

Stomach churning turns food into a fluid and increases the surface area available for enzyme digestion; reduced churning therefore limits both effects. Hydrochloric acid supports protein digestion, saliva acts in the mouth, and nutrient absorption occurs in the small intestine.

Explanation

The liver releases bile into the small intestine, where it helps speed lipid digestion and neutralizes acid from the stomach. Pancreatic and intestinal-wall enzymes digest food molecules but are not the secretion identified as neutralizing that acid; salivary enzymes begin starch digestion in the mouth.

Explanation

Pancreatic enzymes continue the digestion of starch and protein and begin lipid digestion in the small intestine. Bile helps with lipid digestion and acid neutralization, while intestinal-wall enzymes continue digestion of proteins and lipids.

Explanation

Small food molecules produced by digestion are absorbed from the small intestine into the bloodstream by diffusion or active transport. Bile release and enzyme action are digestive processes, while water absorption and feces release are associated with the large intestine and waste elimination.

Explanation

Small molecules produced by digestion enter the bloodstream from the small intestine by diffusion or active transport. Digestion breaks molecules down, water absorption occurs in the large intestine, and feces formation does not transport nutrients into blood.

Explanation

Water is absorbed into the bloodstream as the remaining fluid passes through the large intestine. Nutrient molecules are absorbed in the small intestine, while the stomach and feces release are not the stated site and process.

Explanation

The body uses products of digestion to build new carbohydrates, lipids, and proteins. Using some glucose in respiration is a separate use, while water, waste, and digestive secretions are not the listed building products.