NUSC 1165 EXAM 2 2026 FINAL PAPER SOLVED
QUESTIONS ANSWER KEY APLUS
◉ What is digestion?
Answer: Breaking food into components small enough to be
absorbed.
◉ What are the energy-yielding nutrients?
Answer: Carbohydrates, protein, and fat.
◉ What is absorption?
Answer: The process of taking substances directly into the body.
◉ When are energy-yielding nutrients absorbed?
Answer: Right after digestion.
◉ What is transit time?
Answer: The time food takes to pass through the length of the
digestive tract.
◉ What is normal digestive transit time in healthy adults?
,Answer: 24-72 hours.
◉ What is mucus in the GI tract?
Answer: A viscous fluid secreted by GI glands that lubricates and
protects the digestive tract.
◉ What are enzymes?
Answer: Protein molecules that speed up chemical reactions and
help break carbs, proteins, and fats into smaller components.
◉ What does amylase break down?
Answer: Starch.
◉ What is the end product of starch digestion?
Answer: Glucose.
◉ What enzyme breaks down protein in the stomach?
Answer: Pepsin.
◉ What enzymes break down protein in the small intestine?
Answer: Trypsin and chymotrypsin.
,◉ What is the end product of protein digestion?
Answer: Amino acids.
◉ What enzyme breaks down triglycerides?
Answer: Lipase.
◉ What are triglycerides broken into?
Answer: Fatty acids and glycerol.
◉ What regulates the digestive tract?
Answer: Nerve signals and hormones.
◉ What can stimulate digestive nerve signals?
Answer: Thought, sight, smell, and the presence of food.
◉ What do digestive nerve signals do?
Answer: Cause muscle contractions that churn, mix, and propel food
through the gut.
◉ What else do digestive nerve signals do besides movement?
Answer: Stimulate or inhibit gastric secretions and coordinate
digestion with other body functions.
, ◉ What are digestive hormones?
Answer: Chemical messengers produced in one organ, released into
the blood, and causing responses at other locations.
◉ What do digestive hormones do?
Answer: Help prepare different areas of the gut for food, regulate
digestion, and regulate the rate food moves through the system.
◉ Name two digestive hormones from the study sheet.
Answer: Gastrin and secretin.
◉ What is the cephalic response?
Answer: Signals from the nervous system that prepare the digestive
system to process food.
◉ What activates the cephalic response?
Answer: Sight, sound, and smell of food.
◉ What happens in the mouth during digestion?
Answer: Mechanical digestion by chewing and chemical digestion by
secreted enzymes.
QUESTIONS ANSWER KEY APLUS
◉ What is digestion?
Answer: Breaking food into components small enough to be
absorbed.
◉ What are the energy-yielding nutrients?
Answer: Carbohydrates, protein, and fat.
◉ What is absorption?
Answer: The process of taking substances directly into the body.
◉ When are energy-yielding nutrients absorbed?
Answer: Right after digestion.
◉ What is transit time?
Answer: The time food takes to pass through the length of the
digestive tract.
◉ What is normal digestive transit time in healthy adults?
,Answer: 24-72 hours.
◉ What is mucus in the GI tract?
Answer: A viscous fluid secreted by GI glands that lubricates and
protects the digestive tract.
◉ What are enzymes?
Answer: Protein molecules that speed up chemical reactions and
help break carbs, proteins, and fats into smaller components.
◉ What does amylase break down?
Answer: Starch.
◉ What is the end product of starch digestion?
Answer: Glucose.
◉ What enzyme breaks down protein in the stomach?
Answer: Pepsin.
◉ What enzymes break down protein in the small intestine?
Answer: Trypsin and chymotrypsin.
,◉ What is the end product of protein digestion?
Answer: Amino acids.
◉ What enzyme breaks down triglycerides?
Answer: Lipase.
◉ What are triglycerides broken into?
Answer: Fatty acids and glycerol.
◉ What regulates the digestive tract?
Answer: Nerve signals and hormones.
◉ What can stimulate digestive nerve signals?
Answer: Thought, sight, smell, and the presence of food.
◉ What do digestive nerve signals do?
Answer: Cause muscle contractions that churn, mix, and propel food
through the gut.
◉ What else do digestive nerve signals do besides movement?
Answer: Stimulate or inhibit gastric secretions and coordinate
digestion with other body functions.
, ◉ What are digestive hormones?
Answer: Chemical messengers produced in one organ, released into
the blood, and causing responses at other locations.
◉ What do digestive hormones do?
Answer: Help prepare different areas of the gut for food, regulate
digestion, and regulate the rate food moves through the system.
◉ Name two digestive hormones from the study sheet.
Answer: Gastrin and secretin.
◉ What is the cephalic response?
Answer: Signals from the nervous system that prepare the digestive
system to process food.
◉ What activates the cephalic response?
Answer: Sight, sound, and smell of food.
◉ What happens in the mouth during digestion?
Answer: Mechanical digestion by chewing and chemical digestion by
secreted enzymes.
