Lipids are needed by the body: (Select all that apply)
For fluid balance
As component of myelin sheath
Component of hemoglobin
As component of cell membrane
As an energy source
Correct Answer : B,D,E
A. For fluid balance: Lipids do not play a direct role in maintaining fluid balance; electrolytes and plasma proteins like albumin regulate this function.
B. As a component of the myelin sheath: Lipids, particularly phospholipids and cholesterol, are essential for forming the myelin sheath, which insulates nerve fibers and facilitates efficient nerve conduction.
C. Component of hemoglobin: Hemoglobin is composed of iron and protein (globin chains), not lipids.
D. As a component of the cell membrane: Cell membranes are composed of a lipid bilayer (phospholipids and cholesterol), which helps maintain structural integrity and fluidity.
E. As an energy source: Lipids provide a concentrated energy source, yielding 9 kcal per gram, which is more than carbohydrates (4 kcal/g).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Mucous: Mucous membranes line cavities that open to the exterior, such as the respiratory, digestive, and urinary tracts.
B. Serous: Serous membranes line body cavities (such as the peritoneum, pleura, and pericardium) that do not open to the outside and produce serous fluid to reduce friction between organs.
C. Cutaneous: The cutaneous membrane is the skin, which covers the external body surface.
D. Synovial: Synovial membranes line joint cavities and secrete synovial fluid to lubricate the joints.
Correct Answer is D
Explanation
A. Simplest form of proteins: amino acids: Proteins are broken down into amino acids, their simplest form.
B. Monosaccharide: glucose: Glucose is a monosaccharide, meaning a simple sugar unit.
C. Simplest form of lipids: fatty acids: Lipids are broken down into fatty acids, their simplest form.
D. Amino acids: sucrose, lactose: Amino acids are the building blocks of proteins, whereas sucrose and lactose are carbohydrates (disaccharides), making this group incorrect.
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