Which substances in the small intestine of humans serve to increase the surface area for absorption?
(a.) intestinal glands (b.) villi (c.) pseudopodia (d.) cilia (e.) flagella

The chemical digestion of proteins in humans begins in the
(a.) mouth (b.) esophagus (c.) stomach (d.) liver (e.) small intestine

Food is ingested through the
(a.) salivary glands (b.) small intestine (c.) mouth (d.) rectum

Mechanical reduction of our food begins in the
(a.) epiglottis (b.) small intestine (c.) liver (d.) stomach (e.) mouth

The breaking apart or dispersal of lipids into smaller droplets is called
(a.) hydrolysis (b.) deamination (c.) synthesis (d.) emulsification

Which nutrient groups are chiefly acted upon by stomach enzymes?
(a.) lipids, only (b.) proteins, only (c.) carbohydrates, only (d.) lipids, carbohydrates, and proteins (e.) no nutrients are acted upon in the stomach

Bile helps to
(a.) neutralize fat (b.) emulsify fat (c.) digest glycerol (d.) emulsify glycerol

A decreased reabsorption of water in the large intestine
(a.) gallstone deposits (b.) diarrhea (c.) appendicitis (d.) constipation

In which organ of the alimentary canal does most digestion occur?
(a.) mouth (b.) stomach (c.) small intestine (d.) large intestine (e.) esophagus

The digestion of proteins is completed in the
(a.) stomach (b.) small intestine (c.) esophagus (d.) large intestine

The least digestion of food occurs in the
(a.) small intestine (b.) mouth (c.) esophagus (d.) stomach

The passage of bile may be blocked by
(a.) gallstones (b.) mucus (c.) villi (d.) an inflamed appendix

A lubricant for food as it passes through the alimentary canal is
(a.) pepsin (b.) bile (c.) pancreatic juice (d.) intestinal juice (e.) mucus

The taking in of food is called
(a.) digestion (b.) secretion (c.) lubrication (d.) ingestion

The chemical digestion of lipids or fats begins in the
(a.) fluffer valve (b.) lungs
(c.) stomach (d.) mouth (e.) small intestine

This structure serves as a temporary pouch for the storage of feces. This structure is the
(a.) mouth (b.) esophagus (c.) small intestine (d.) rectum

The breakdown of food an organism so it can be absorbed is called
(A)ingestion (b.) digestion (c.) secretion (d.) excretion

In humans, food is moved from the mouth to the stomach as a result of
(a.) diffusion (b.) circulation (c.) persistalsis (d.) egestion
Which foods should be included in a balanced diet as a good source of roughage?
(a.) red meat and poultry (b.) fresh fruits and vegetables (c.) eggs and milk products (d.) animal fat and plant oils

Feces is usually about 40 percent water and 60 percent solid matter. Reducing the water content to 20 percent would most likely result in
(a.) constipation (b.) diarrhea (c.) gallstones (d.) ulcers

Food is usually kept from entering the trachea by the
(a.) anus (b.) ribs (c.) esophagus (d.) epiglottis (e.) diaphragm

Which substance is normally absorbed by structure F?
(a.) bile (b.) nutrients (c.) HCl (d.) water

Which food would provide the most roughage for the body?
(a.) fried chicken and a milkshake (b.) baked fresh fish (c.) lettuce and tomato salad (d.) a 99 cent whopper (hamburger) special


After food enters the small intestine, lipases, proteases, and amylases are secreted into the small intestine by the
(a.) liver (b.) pancreas (c.) mouth (d.) large intestine

In some regions of the world, children suffer from a protein deficiency known as kwashiorkor. This deficiency occurs when a child's diet is changed from high-protein breast milk to watery cereal. Even though the child is receiving calories, the child becomes sick and less active, and growth ceases. These symptoms are probably due to
(a.) too many nucleic acids in the diet (b.) not enough carbohydrates in the diet (c.) an overconsumption of complete protein foods (d.) a lack of essential amino acids in the diet

Which type of digestion occurs in the mouth when an individual chews a piece of bread?
(a.) chemical digestion (b.) mechanical digestion (c.) both chemical and mechanical digestion (d.) neither chemical nor mechanical digestion

In humans, chemical digestion is accomplished by enzyme action that begins in the mouth and ends in the
(a.) liver (b.) small intestine (c.) gall bladder (d.) stomach