Nokea
Infants' gastric juice contains
- A. Nuclease, pepsinogen, lipase
- B. Maltase, pepsinogen, rennin
- C. Amylase, rennin, pepsinogen
- D. Pepsinogen, lipase, rennin
Correct Answer: D
Rationale: Infants' gastric juice contains pepsinogen, lipase, and rennin to aid in milk digestion.
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Which of the following glands produces saliva?
- A. pancreas
- B. thyroid
- C. pituitary
- D. parotid
Correct Answer: D
Rationale: The parotid gland is one of the major salivary glands that produce saliva, which initiates starch digestion and lubricates food.
The cells of the epithelial lining in the vertebrate stomach are not damaged by HCl because of
- A. Mucus secretion covering the epithelium
- B. Neutralization of HCl by alkaline gastric juice
- C. HCl being dilute
- D. Epithelium being resistant to HCl
Correct Answer: A
Rationale: Mucus secreted by gastric cells forms a protective barrier against HCl, preventing damage to the stomach lining.
Which of the following would MOST directly affect the operations of the digestive system?
- A. osteoporosis
- B. liver damage
- C. heart attack
- D. kidney failure
Correct Answer: B
Rationale: Liver damage directly impacts digestion by reducing bile production, essential for fat breakdown.
How is food processed to distribute nutrients to the body's cells?
- A. Ingested, digested, absorbed, assimilated
- B. Absorbed directly from the mouth
- C. Excreted immediately
- D. Stored in the stomach indefinitely
Correct Answer: A
Rationale: Food is ingested (taken in), digested (broken down), absorbed (taken into blood), and assimilated (distributed to cells).
Match each term with the correct description: organ that holds urine until it leaves the body
- A. urethra
- B. urinary system
- C. bladder
- D. kidneys
Correct Answer: C
Rationale: The bladder stores urine until it is excreted.