Question

question 5 (1 point)
what happens during angiogenesis in cancer development?
the proto - oncogenes in a single cell mutate to initiate uncontrolled cell division.
blood and lymphatic vessels penetrate the tumor to supply it with oxygen and nutrients.
cancer cells break away from the original tumor and invade other body parts.
precancerous cells multiply while being encapsulated in the original tissue.
cancer cells produce chemicals that kill the surrounding blood and lymphatic vessels.

Explanation:

Angiogenesis is the formation of new blood vessels. In cancer development, it refers to the process where blood and lymphatic vessels grow into the tumor to supply it with oxygen and nutrients, which is crucial for tumor growth beyond a certain size.

• The first option describes the initial mutation (not angiogenesis).
• The third option is metastasis.
• The fourth option is about pre - cancerous cell growth (not angiogenesis).
• The fifth option is incorrect as cancer cells do not kill these vessels but rather induce their growth.

Answer:

Blood and lymphatic vessels penetrate the tumor to supply it with oxygen and nutrients.