How much oxygen, blood supplies to tissues in one circulationa)75%b)1.34%c)25%d)7%Correct answer is option 'C'. Can you explain this answer?

Question

Answer

Blood supplies approximately 25% of oxygen to the tissues in one circulation as the partial pressure of oxygen in arterial blood is 75-95mmHg.

Answer

As only 5ml out of 20ml of oxygen carried by 100 ml of blood supplies to tissues.

i.e. it contributes 25%.

Answer

Yes

Answer

Blood carry 19.4 mL oxygen per 100 mL and it delivers 5mL oxygen in normal condition to the tissue . and in the term of percentage 5mL is 25% of 19.4mL

Answer

Oxygen Delivery to Tissues in One Circulation

To understand the amount of oxygen that blood supplies to tissues in one circulation, it is important to consider the components of blood and the oxygen-carrying capacity of red blood cells.

Components of Blood

Blood is composed of various components, including red blood cells (erythrocytes), white blood cells (leukocytes), platelets (thrombocytes), and plasma. Among these components, red blood cells play a crucial role in oxygen transport.

Oxygen-Carrying Capacity of Red Blood Cells

Red blood cells contain a protein called hemoglobin, which has a high affinity for oxygen. Hemoglobin binds to oxygen in the lungs, forming oxyhemoglobin. This oxyhemoglobin complex is transported through the circulatory system to deliver oxygen to tissues.

Oxygen Dissociation Curve

The oxygen dissociation curve represents the relationship between the partial pressure of oxygen (PO2) and the saturation of hemoglobin with oxygen. It shows how readily hemoglobin binds and releases oxygen based on the oxygen concentration in the blood.

The curve is sigmoidal in shape, indicating that at low oxygen concentrations (e.g., in tissues), hemoglobin has a higher affinity for oxygen and readily binds it. As the oxygen concentration increases (e.g., in the lungs), hemoglobin's affinity for oxygen decreases, allowing for oxygen release to tissues.

Answer Explanation

According to the given options, the correct answer is option 'C' (25%). This means that approximately 25% of the oxygen carried by red blood cells is delivered to tissues in one circulation.

During each circulation, red blood cells continuously pick up oxygen in the lungs and release it to tissues throughout the body. The oxygen dissociation curve helps explain why only a fraction of the oxygen is delivered to tissues. Hemoglobin's affinity for oxygen is highest in tissues, facilitating oxygen release, while it is lowest in the lungs, allowing for oxygen uptake.

Therefore, while red blood cells are responsible for transporting oxygen, they do not release all of it to the tissues in one circulation. Only around 25% of the oxygen carried by red blood cells is delivered to the tissues, ensuring a balance between oxygen supply and demand in the body.

It is important to note that the percentage of oxygen delivered to tissues can vary depending on factors such as oxygen demand, tissue oxygenation status, and overall health.

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