The majority of digestion occurs in the:
  • mouth
  • stomach
  • small intestine
  • large intestine
Proteins are broken down into _______.
  • Fatty acids
  • Glycerol
  • Glucose
  • Amino acids
Large carbohydrates are chemically digested into smaller _____ molecules
  • proteins
  • amino acids
  • glucose
  • enzymes
Digestion begins in the ______.
  • Mouth
  • Stomach
  • Small intestine
  • Gallbladder
Saliva contains a carbohydrate enzyme called ___.
  • Amylase
  • Pepsin
  • Lipase
  • Maltase
The structure that keeps food from entering the trachea is called the _____________.
  • Salivary gland
  • Epiglottis
  • Pharynx
  • Esophagus
The chewed up food moves from the mouth to the stomach through the ___________.
  • esophagus
  • pancreas
  • liver
  • small intestine
What organ is this?
sc-8 sb-3-Human Digestive Systemimg_no 271.jpg
  • stomach
  • large intestine
  • small intestine
  • esophagus
The main function of the stomach is to:
  • Store food
  • Produce hydrochloric acid
  • Begin protein digestion
  • All the above
Which enzyme does the stomach produce?
  • amylase
  • lipase
  • maltase
  • pepsin
Which of the following kills bacteria in the human digestive system?
  • Hydrochloric acid
  • Mucus
  • Amylase
  • Pepsin
Which digestive organ is represented by the letter B?
sc-8 sb-3-Human Digestive Systemimg_no 272.jpg
  • Pancreas
  • Liver
  • Mouth
  • Small intestine
Which food is unsuitable for a person who cannot secrete enough bile?
  • butter
  • lean meat
  • spinach
  • rice
Where does protein digestion begin?
  • mouth
  • stomach
  • small intestine
  • large intestine
The diagram represents human digestive system. From which structure are glucose and amino acids normally absorbed into the circulatory system?
sc-8 sb-3-Human Digestive Systemimg_no 273.jpg
  • F - Large Intestine
  • H - Liver
  • C - Stomach
  • E - Small Intestine
Absorption of nutrients happens through small finger-like structures called ________.
  • sphincters
  • enzymes
  • lipids
  • villi
What organ is this?
sc-8 sb-3-Human Digestive Systemimg_no 274.jpg
  • stomach
  • small intestine
  • large intestine
  • esophagus
The diagram represents a portion of a human body. The principal function of structure X is to
sc-8 sb-3-Human Digestive Systemimg_no 275.jpg
  • produce amylase
  • produce pepsin
  • absorb water
  • absorb nutrients
Which letter collects and stores wastes until they are ready to be released from the body?
sc-8 sb-3-Human Digestive Systemimg_no 276.jpg
  • D
  • E
  • K
  • L
Which of the following kills bacteria in the human alimentary canal?
  • gastric juice
  • mucus
  • pancreatic juice
  • saliva
Where does fat digestion begins?
  • colon
  • liver
  • small intestine
  • stomach
Which of the following correctly describes the purpose of digestion?
  • To break down complex food molecules into simple soluble molecules
  • To make complex food molecules from simple soluble molecules
  • To make use of simple soluble food molecules
  • To remove complex food molecules from the body
Large food molecules need to be broken down to be small enough to pass through cell membranes.
  • True
  • False
People in the Arctic region live in conditions where temperatures are as low as -40 °C. What should their diet be rich in, to adapt to these conditions?
  • amino acids
  • glucose
  • fats
  • vitamins
Which statement is NOT true about proteins?
  • Protein digestion begins in the mouth.
  • Proteins are used for cell growth and repair.
  • Proteins are broken down to form amino acids.
  • Some complex proteins function as enzymes in the body.
Where is the digestion of food completed?
  • liver
  • large intestine
  • stomach
  • small intestine
Why is the oesophagus muscular?
  • To break the food into even smaller pieces
  • To produce enzymes to digest food
  • To push food from the mouth into the stomach
  • To move the food back and forth in two directions
Where does carbohydrate digestion begins?
  • liver
  • mouth
  • oesophagus
  • stomach
Where does protein digestion begins?
  • large intestine
  • mouth
  • small intestine
  • stomach
What colour will starch turn brown iodine solution into?
  • blue-black
  • colourless
  • red
  • yellow
Which of the following is a physical digestion?
  • Bile emulsifies fats into smaller fat droplets.
  • Glucose formed by maltase in the small intestine.
  • Protease breaks down the proteins.
  • Salivary amylase mixes with starch in the mouth.
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