Blood Composition and Functions

The video explains hematocrit, the percentage of red blood cells in blood, and its components: erythrocytes, Buffy coat, and plasma. It details the function and composition of each layer, including the role of erythrocytes, platelets, white blood cells, and plasma proteins. The video also covers conditions like anemia and polycythemia, and the importance of water and proteins in plasma.

What is hematocrit primarily used to measure?

• The percentage of platelets in blood

• The percentage of plasma in blood

• The percentage of red blood cells in blood

• The percentage of white blood cells in blood

What is the average percentage of erythrocytes in blood?

• 35%

• 45%

• 65%

• 55%

What condition is indicated by a hematocrit level below 45%?

• Polycythemia

• Leukocytosis

• Anemia

• Thrombocytosis

What are the two main components of the Buffy coat?

• Red blood cells and white blood cells

• Plasma and platelets

• White blood cells and platelets

• Red blood cells and plasma

What is the condition called when platelet count is below 150,000 per microliter?

• Anemia

• Polycythemia

• Leukopenia

• Thrombocytopenia

What percentage of blood is typically made up of plasma?

• 55%

• 45%

• 35%

• 25%

What is the primary component of plasma?

• Glucose

• Water

• Electrolytes

• Proteins

Which plasma protein is responsible for regulating osmotic pressure?

• Globulin

• Fibrinogen

• Albumin

• Hemoglobin

What is the role of gamma globulins in plasma?

• Acting as antibodies

• Transporting oxygen

• Regulating blood pressure

• Carrying nutrients

Where is metabolic waste in plasma primarily transported for excretion?

• Heart

• Lungs

• Spleen

• Kidneys