CH Medical Terminology & Anatomy 3 — Questions and Answers
Question 1: The medical term 'mucosa' refers to which layer of the intestinal wall?
- The outermost serous layer
- The middle smooth muscle layer
- The innermost lining that secretes mucus (Correct answer)
- The submucosal connective tissue layer
Correct answer: The innermost lining that secretes mucus
The mucosa is the innermost layer of the GI tract wall, composed of epithelial cells that absorb nutrients and goblet cells that secrete protective mucus.
Question 2: Which term describes inflammation of the rectum?
- Colitis
- Proctitis (Correct answer)
- Sigmoiditis
- Ileitis
Correct answer: Proctitis
Proctitis is inflammation of the rectum, derived from 'procto-' (rectum) and '-itis' (inflammation).
Question 3: In colonic hydrotherapy, understanding 'sphincter' anatomy is critical. The internal anal sphincter is composed of which type of muscle?
- Voluntary skeletal muscle
- Involuntary smooth muscle (Correct answer)
- Cardiac muscle
- Mixed skeletal and smooth muscle
Correct answer: Involuntary smooth muscle
The internal anal sphincter is composed of involuntary smooth muscle, maintained in tonic contraction under autonomic nervous system control.
Question 4: The medical prefix 'retro-' as in 'retroperitoneal' means:
- In front of
- Behind or posterior to (Correct answer)
- Below or inferior to
- Alongside
Correct answer: Behind or posterior to
The prefix 'retro-' means behind or posterior; retroperitoneal structures (like parts of the colon) lie behind the peritoneal cavity.
Question 5: What does the term 'defecation reflex' describe in gastrointestinal physiology?
- Involuntary vomiting triggered by rectal distension
- The coordinated neural reflex that initiates bowel movements in response to rectal filling (Correct answer)
- Absorption of water in the descending colon
- Segmental contractions of the sigmoid colon
Correct answer: The coordinated neural reflex that initiates bowel movements in response to rectal filling
The defecation reflex is triggered when the rectum distends with feces, sending signals via the sacral spinal cord to relax the internal anal sphincter and initiate defecation.
Question 6: The term 'borborygmi' in medical terminology refers to:
- Painful cramping during defecation
- Rumbling sounds produced by gas moving through the intestines (Correct answer)
- Excessive mucus production in the colon
- Distension of the abdomen due to gas
Correct answer: Rumbling sounds produced by gas moving through the intestines
Borborygmi are the audible rumbling or gurgling sounds caused by peristalsis and gas movement through the intestinal tract.
Question 7: Which anatomical structure connects the large intestine to the posterior abdominal wall and carries its blood supply?
- Greater omentum
- Falciform ligament
- Mesocolon (Correct answer)
- Broad ligament
Correct answer: Mesocolon
The mesocolon is a fold of peritoneum that attaches segments of the colon to the posterior abdominal wall and transmits blood vessels, nerves, and lymphatics.
CH Medical Terminology & Anatomy 3
The medical term 'mucosa' refers to which layer of the intestinal wall?