,BIOL252/BIOL 252 Human Anatomy & Physiology II w/Lab
1. Which of the following is the correct order of the digestive processes?
A) Absorption, Ingestion, Propulsion, Defecation, Mechanical Digestion
B) Ingestion, Propulsion, Mechanical Digestion, Chemical Digestion, Absorption, Defecation
C) Propulsion, Ingestion, Chemical Digestion, Absorption, Mechanical Digestion, Defecation
D) Ingestion, Mechanical Digestion, Propulsion, Absorption, Chemical Digestion, Defecation
Correct Answer: Ingestion, Propulsion, Mechanical Digestion, Chemical Digestion, Absorption,
Defecation
Rationale: Digestion begins with ingestion (eating), followed by propulsion (movement of food through
the tract). Mechanical digestion (physical breakdown) and chemical digestion (enzymatic breakdown)
occur, often simultaneously. Nutrients are then absorbed, and finally, undigested material is eliminated
via defecation.
2. The layer of the alimentary canal responsible for secretions and absorption is the:
A) Serosa
B) Muscularis externa
C) Mucosa
D) Submucosa
Correct Answer: Mucosa
Rationale: The mucosa is the innermost layer of the GI tract and is responsible for the secretion of
mucus and digestive enzymes, as well as the absorption of nutrients. The serosa is the outermost layer,
the muscularis externa is responsible for motility, and the submucosa contains blood vessels and nerves.
3. Which of the following is NOT a function of the digestive system?
A) Ingestion of food
B) Mechanical and chemical digestion
,C) Absorption of nutrients
D) Production of hormones that regulate blood glucose
Correct Answer: Production of hormones that regulate blood glucose
Rationale: The digestive system functions in ingestion, mechanical and chemical digestion, absorption of
nutrients, and elimination of wastes. Production of hormones that regulate blood glucose (insulin and
glucagon) is primarily a function of the endocrine system (pancreas).
4. The gastrointestinal tract is also known as the:
A) Alimentary canal
B) Peritoneal cavity
C) Mesentery
D) Omentum
Correct Answer: Alimentary canal
Rationale: The GI tract is a continuous tube from the mouth to the anus, also called the alimentary
canal. The peritoneal cavity is the space within the abdomen, the mesentery attaches the intestines to
the posterior wall, and the omentum is a fold of peritoneum connecting the stomach to other organs.
5. Which of the following is the correct order of the digestive tract layers from innermost to outermost?
A) Serosa → muscularis → submucosa → mucosa
B) Mucosa → submucosa → muscularis → serosa
C) Mucosa → muscularis → submucosa → serosa
D) Serosa → submucosa → mucosa → muscularis
Correct Answer: Mucosa → submucosa → muscularis → serosa
, Rationale: The four layers of the GI tract, from innermost to outermost, are the mucosa, submucosa,
muscularis externa, and serosa (or adventitia).
6. The first section of the colon, running upwards from the cecum, is called the:
A) Transverse colon
B) Descending colon
C) Ascending colon
D) Sigmoid colon
Correct Answer: Ascending colon
Rationale: The ascending colon travels upward on the right side of the abdominal cavity from the cecum
to the transverse colon.
7. A fold of tissue that attaches the intestines to the posterior abdominal wall, providing vascular,
lymphatic, and nerve supply, is called the:
A) Omentum
B) Mesentery
C) Peritoneum
D) Falciform ligament
Correct Answer: Mesentery
Rationale: The mesentery is a double layer of peritoneum that attaches the intestines to the posterior
abdominal wall, providing support and carrying blood vessels, lymphatics, and nerves to the intestinal
tract.
8. The esophagus is lined with what type of epithelium?
A) Simple columnar epithelium
B) Stratified squamous epithelium, non-keratinized
1. Which of the following is the correct order of the digestive processes?
A) Absorption, Ingestion, Propulsion, Defecation, Mechanical Digestion
B) Ingestion, Propulsion, Mechanical Digestion, Chemical Digestion, Absorption, Defecation
C) Propulsion, Ingestion, Chemical Digestion, Absorption, Mechanical Digestion, Defecation
D) Ingestion, Mechanical Digestion, Propulsion, Absorption, Chemical Digestion, Defecation
Correct Answer: Ingestion, Propulsion, Mechanical Digestion, Chemical Digestion, Absorption,
Defecation
Rationale: Digestion begins with ingestion (eating), followed by propulsion (movement of food through
the tract). Mechanical digestion (physical breakdown) and chemical digestion (enzymatic breakdown)
occur, often simultaneously. Nutrients are then absorbed, and finally, undigested material is eliminated
via defecation.
2. The layer of the alimentary canal responsible for secretions and absorption is the:
A) Serosa
B) Muscularis externa
C) Mucosa
D) Submucosa
Correct Answer: Mucosa
Rationale: The mucosa is the innermost layer of the GI tract and is responsible for the secretion of
mucus and digestive enzymes, as well as the absorption of nutrients. The serosa is the outermost layer,
the muscularis externa is responsible for motility, and the submucosa contains blood vessels and nerves.
3. Which of the following is NOT a function of the digestive system?
A) Ingestion of food
B) Mechanical and chemical digestion
,C) Absorption of nutrients
D) Production of hormones that regulate blood glucose
Correct Answer: Production of hormones that regulate blood glucose
Rationale: The digestive system functions in ingestion, mechanical and chemical digestion, absorption of
nutrients, and elimination of wastes. Production of hormones that regulate blood glucose (insulin and
glucagon) is primarily a function of the endocrine system (pancreas).
4. The gastrointestinal tract is also known as the:
A) Alimentary canal
B) Peritoneal cavity
C) Mesentery
D) Omentum
Correct Answer: Alimentary canal
Rationale: The GI tract is a continuous tube from the mouth to the anus, also called the alimentary
canal. The peritoneal cavity is the space within the abdomen, the mesentery attaches the intestines to
the posterior wall, and the omentum is a fold of peritoneum connecting the stomach to other organs.
5. Which of the following is the correct order of the digestive tract layers from innermost to outermost?
A) Serosa → muscularis → submucosa → mucosa
B) Mucosa → submucosa → muscularis → serosa
C) Mucosa → muscularis → submucosa → serosa
D) Serosa → submucosa → mucosa → muscularis
Correct Answer: Mucosa → submucosa → muscularis → serosa
, Rationale: The four layers of the GI tract, from innermost to outermost, are the mucosa, submucosa,
muscularis externa, and serosa (or adventitia).
6. The first section of the colon, running upwards from the cecum, is called the:
A) Transverse colon
B) Descending colon
C) Ascending colon
D) Sigmoid colon
Correct Answer: Ascending colon
Rationale: The ascending colon travels upward on the right side of the abdominal cavity from the cecum
to the transverse colon.
7. A fold of tissue that attaches the intestines to the posterior abdominal wall, providing vascular,
lymphatic, and nerve supply, is called the:
A) Omentum
B) Mesentery
C) Peritoneum
D) Falciform ligament
Correct Answer: Mesentery
Rationale: The mesentery is a double layer of peritoneum that attaches the intestines to the posterior
abdominal wall, providing support and carrying blood vessels, lymphatics, and nerves to the intestinal
tract.
8. The esophagus is lined with what type of epithelium?
A) Simple columnar epithelium
B) Stratified squamous epithelium, non-keratinized
