Understanding Tumor Angiogenesis

What is the primary function of hemoglobin in blood vessels?

• To remove waste products

• To regulate blood pressure

• To supply cells with oxygen

• To transport nutrients

Why can a tumor only grow to a certain size without additional oxygen supply?

• Because it runs out of nutrients

• Because it reaches the limit of its genetic potential

• Because it becomes too heavy

• Because cells inside the tumor do not receive enough oxygen

What triggers the angiogenic switch in a tumor?

• A decrease in nutrient levels

• The presence of immune cells

• An increase in blood pressure

• The release of pro-angiogenic growth factors

What role does VEGF play in tumor angiogenesis?

• It reduces the oxygen supply to the tumor

• It promotes the degradation of the basement membrane

• It inhibits blood vessel formation

• It strengthens the blood vessel walls

Which of the following is a treatment strategy against VEGF?

• Enhancing immune response

• Using antibodies against VEGF

• Blocking nutrient absorption

• Increasing oxygen supply