Question

1. In virtually every case known, the concentration of is high inside the cell relative to the extracellular medium.

A. chloride

B. potassium

C. calcium

D. sodium

2. Myelin is composed of flattened cell processes consisting essentially of layer upon layer of plasma membranes, rich in              , which accounts for its white color.

A. guanidine

B. lipids

C. albumin

D. nucleic acids

Answer 1

Ans. 1. Option B is the correct answer.

EXPLANATIONS:- The concentration of the potassium ions is always higher in the cells as compared to the extracellular medium in virtually all case. All other ions, Sodium, chloride and calcium remains low in the intracellular medium.

Ans 2. Option B is the correct answer.

EXPLANATIONS:- Myelin sheath is composed of the flattened cell processes consisting of essentially of layer upon layer of plasma membrane, rich in lipids which accounts for its white color.