Final answer:
Normal blood is comprised of red blood cells, white blood cells, and platelets, with a pH level of around 7.4. Red blood cells are the most plentiful, and the pH level is critical for maintaining body function.
Step-by-step explanation:
Normal blood contains several types of cells and has a characteristic pH level. Firstly, blood consists of red blood cells (erythrocytes), which are the most abundant cell type in the blood, responsible for transporting oxygen throughout the body. Additionally, there are white blood cells (leukocytes), which are vital for the immune response and fight infections. Platelets, also a component of blood, play a crucial role in clotting processes. The pH of blood is a critical factor, usually maintained at around 7.4, which is slightly basic. This regulation of pH is essential for the overall function of the body, including the activity of enzymes and metabolic processes.
When analyzing the options provided and comparing them against the known facts about blood composition and pH, option (a) Red blood cells, white blood cells, platelets, pH 7.4 is the correct description of normal blood. This is because the average pH of blood ranges from 7.35 to 7.45, and red blood cells outnumber white blood cells and platelets significantly.