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Which of the following transports food, carbon dioxide and nitrogenous wastes in a dissolved form?
Lymph
Plasma
Blood platelets
Red blood corpuscles
Plasma
Plasma is the liquid component of blood that transports dissolved nutrients (food), respiratory gases like carbon dioxide, and nitrogenous metabolic wastes throughout the body. While red blood cells primarily transport oxygen via hemoglobin, plasma acts as the primary medium for the transport of dissolved substances in the circulatory system.
Plasma is the liquid component of blood that transports dissolved nutrients (food), respiratory gases like carbon dioxide, and nitrogenous metabolic wastes throughout the body. While red blood cells primarily transport oxygen via hemoglobin, plasma acts as the primary medium for the transport of dissolved substances in the circulatory system.
Think of blood as a cargo train. If red blood cells are the specialized containers for oxygen, plasma is the liquid highway of the track itself, allowing all other dissolved substances (the 'cargo') to flow easily from one location to another.
Plasma: The 'Universal Liquid' of the circulatory system that carries everything that isn't trapped inside a cell.
CO2тАЛ+H2тАЛOтЗМH2тАЛCO3тАЛтЗМH++HCO3тИТтАЛ тАФ Represents the conversion of carbon dioxide to bicarbonate for transport in plasma.
Blood consists of a fluid matrix called plasma and formed elements (cells). Plasma is composed of about 90-92% water, which provides a solvent medium for carrying substances. Carbon dioxide is transported primarily as bicarbonate ions (HCO3тИТтАЛ) dissolved in plasma, while glucose, amino acids, and nitrogenous wastes like urea are transported in direct solution within the plasma volume.
Plasma makes up approximately 55% of total blood volume.
It is straw-colored and mainly composed of water, proteins (albumin, globulins, fibrinogen), electrolytes, and dissolved waste products.
Nitrogenous waste (urea, uric acid) is collected by blood from cells and transported to the kidneys for filtration via the plasma.
Food (glucose, fats, vitamins) is absorbed into the plasma from the small intestine.
High water content allows for efficient transport of polar and non-polar substances.
Rapid distribution of essential nutrients to tissues.
Clinical blood analysis (serum/plasma testing)
Diagnosis of metabolic disorders via blood waste markers
Red blood cells (erythrocytes) are specialized for oxygen transport and lack a nucleus in humans.
Blood platelets are involved in coagulation (clotting) rather than transport of metabolic waste.
Lymph is similar to plasma but lacks large proteins and red blood cells; it is involved in lipid transport and immunity.
B is correct тАФ Blood plasma is the liquid component responsible for transporting dissolved nutrients, metabolic waste products, and dissolved gases like carbon dioxide.
Remember that while red blood cells are for OтВВ, plasma is the universal transporter for solutes (glucose, COтВВ, urea). Do not confuse them!
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