Haemoglobin

The video explains how oxygen is transported in the blood, highlighting that 97% of the dry weight of mammalian red blood cells is hemoglobin. It further describes how oxygen binds to hemoglobin to form oxyhemoglobin, which turns bright red, the color of arterial blood.

What is the primary function of hemoglobin in the blood?

• To transport carbon dioxide

• To transport oxygen

• To transport hormones

• To transport nutrients

What percentage of the dry weight of mammalian red blood cells is made up of hemoglobin?

• 97%

• 100%

• 75%

• 50%

What happens when oxygen binds to hemoglobin?

• It forms deoxyhemoglobin

• It forms oxyhemoglobin

• It forms carboxyhemoglobin

• It forms methemoglobin

What color does blood become when oxygen binds to hemoglobin?

• Green

• Bright red

• Blue

• Dark red

Which type of blood is characterized by its bright red color due to oxyhemoglobin?

• Capillary blood

• Arterial blood

• Lymphatic fluid

• Venous blood