An appropriate dilution indicator for measuring

Correct Answer: C

Rationale: Inulin measures ECF volume as it's confined to extracellular spaces; D2O measures TBW, not ICF directly.

Correct Answer: C

Rationale: High K+ disrupts cardiac membrane potential, risking arrhythmias; renal failure and crush injuries elevate K+.

Correct Answer: B

Rationale: The muscles which are not under control, are involuntary muscle, for example Smooth or unstrained muscles and cardiac muscles.

Correct Answer: B

Rationale: Cardiac muscles are in the wall of the heart and large veins like pulmonary veins and vena cava. Cardiac muscle fibres have blood vessels so never get fatigued.

Correct Answer: C

Rationale: Epithelial tissues are tightly packed into continuous sheet with small amount of cementing material and no intercellular space.