PSB-RN Nutrition & Dietary Management 3

Question 1

Which vitamin is primarily synthesized in the human skin upon exposure to ultraviolet B (UVB) sunlight?

Accepted Answer

Vitamin D

Answer

Vitamin D is synthesized in the skin when UVB radiation from sunlight converts 7-dehydrocholesterol to previtamin D3, which is then converted to active vitamin D.

Question 2

What is parenteral nutrition?

Accepted Answer

Nutrition delivered intravenously, bypassing the gastrointestinal tract

Answer

Parenteral nutrition delivers all required nutrients directly into the bloodstream via an intravenous catheter, completely bypassing the gastrointestinal system.

Question 3

A patient receiving warfarin (Coumadin) therapy should monitor their consistent intake of which food group?

Accepted Answer

Dark leafy green vegetables high in vitamin K

Answer

Dark leafy greens are high in vitamin K, which promotes clotting and directly antagonizes warfarin's anticoagulant mechanism, altering INR levels.

Question 4

Which mineral, abundant in dairy products, is the primary component responsible for maintaining bone density?

Accepted Answer

Calcium

Answer

Calcium is the primary mineral in bone matrix (hydroxyapatite), and adequate calcium intake throughout life is essential for maintaining bone density and preventing osteoporosis.

Question 5

Which type of modified diet is prescribed for patients with dysphagia (difficulty swallowing)?

Accepted Answer

Mechanically soft or pureed diet

Answer

Dysphagia patients require texturally modified foods — such as mechanical soft, minced, or pureed consistencies — to reduce aspiration risk while maintaining adequate nutrition.

PSB-RN - Registered Nursing Exam Practice Test

PSB-RN - Registered Nursing Exam Practice Test

PSB-RN Nutrition & Dietary Management 3