Nokea
Which process matches the definition: Rhythmic contraction and relaxation of smooth muscle that propel food along the digestive tract?
- A. Ingestion
- B. Peristalsis
- C. Assimilation
- D. Absorption
Correct Answer: B
Rationale: Peristalsis is the rhythmic muscular action that moves food through the digestive tract.
You may also like to solve these questions
Which enzyme helps break down fats in the digestive process?
- A. lipase
- B. pepsin
- C. papain
- D. amylase
Correct Answer: A
Rationale: Lipase is the enzyme responsible for breaking down fats into fatty acids and glycerol during digestion.
The following cells are involved in lipid digestion & absorption EXCEPT:
- A. Parotid acini
- B. Liver cells (hepatocytes)
- C. Pancreatic acini
- D. Chief cells of fundic glands
Correct Answer: A
Rationale: Parotid acini produce saliva, which begins carbohydrate digestion, not lipid digestion; hepatocytes and pancreatic acini produce bile and lipase for lipids.
About esophagus, all are true EXCEPT:
- A. Lined by st sq epith
- B. Glands are present mainly in submucosa
- C. Muscularis externa are formed entirely of smooth muscles.
- D. Muscularis mucosa is well developed in the lower half
Correct Answer: C
Rationale: The muscularis externa of the esophagus transitions from skeletal muscle (upper third) to smooth muscle (lower third), not entirely smooth muscle.
In Colon, constrictions of its wall form a series of small pockets called-
- A. Haustra
- B. Crypts of Lieberkuhn
- C. Zymogen cells
- D. Taeniae
Correct Answer: A
Rationale: Haustra are the small pouches formed by the constrictions of the colon wall, aiding in the mixing and absorption process.
Peristalsis moves food material:
- A. in the stomach and small intestine only
- B. in the small and large intestines only
- C. in the stomach and small and large intestines only
- D. from the pharynx to the anal canal
Correct Answer: D
Rationale: Peristalsis is a wave-like muscle contraction that moves food material through the entire gastrointestinal tract.