Biology STAAR (State of Texas Assessments of Academic Readiness) Practice Test

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Study for the Biology STAAR Test. Improve your skills with flashcards and multiple choice questions, each question is accompanied by hints and explanations. Prepare for success!

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What component of blood is responsible for transporting nutrients and gases?

Platelets
Red blood cells
Plasma
White blood cells

The correct answer is: Plasma

Plasma is the component of blood that is primarily responsible for transporting nutrients and gases. It makes up about 55% of total blood volume and is a yellowish liquid that consists mostly of water, but also contains proteins, electrolytes, hormones, and waste products. Plasma acts as a solvent, allowing nutrients such as glucose, amino acids, and vitamins to be dissolved and transported throughout the body. Additionally, it carries gases like oxygen and carbon dioxide, facilitating their exchange between tissues and the respiratory system. Other components, such as red blood cells, are specifically designed for oxygen transport, while white blood cells are primarily involved in the immune response. Platelets play a crucial role in blood clotting rather than nutrient transportation. Therefore, the transport functions of plasma make it the correct answer in this context.