Oncology

Question 1

Define generation time of the cell?

Answer 1

The time from when a cell enters the cell cycle to when the cell divides into two identical cells.

Question 2

Define the contact inhibition?

Answer 2

Normal cells respect the boundaries and territory of the cells surrounding them.

Question 3

Define the pyramid effect ?

Answer 3

Proliferation of the cancer cells it’s indiscriminate and continuous sometimes they produce more than two cells at the time of mitosis in this way there is a continuous growth of a tumor mass.

Question 4

Define doubling time?

Answer 4

The time required for a tumor mass to double in size.

Question 5

Define cell differentiation?

Answer 5

An orderly process that progresses from a state of immaturity A State of maturity

Question 6

Define Protooncogenes?

Answer 6

Normal cell genes that are important regulators of normal cell processes; they promote growth whereas tumor suppressor genes suppress growth.

Question 7

Oncogenes are?

Answer 7

Tumor inducing genes.

Question 8

Mutations that alter the expression of protooncogenes can activate them to function as?

Answer 8

oncogenes (tumor inducing genes)

Question 9

Define tumor suppressor genes?

Answer 9

They function to regulate cell growth and prevent cells from growing through the cell cycle.

Question 10

Carcinoma in situ CIS referes to what?

Answer 10

A neoplasm whose cells are localized and show no tendency to invade or metastasize to other tissues.