Cell Function, lymphatic system & oncology Flashcards
Why do cells adapt?
To maintain homeostasis in the body
Name 5 types of cell adaption (5)
- hyperplasia
- hypoplasia (hypertrophy)
- atrophy
- metaphasia
- dysphasia
When a cell is injured and cannot be repaired, what is the outcome?
How does the body respond?
Cell death (apoptosis)
Cells shut down, shrink, and are sloughed off, phagocyte eats it
Ishemia
- When a cell is deprived of oxygen
- decreased blood flow to tissue or an organ. It essentially strangles the tissue or organ by limiting necessary nutrients and oxygen
What does necrosis mean? (Nekros)
“Dead body”
- a cells inability to survive due to the extent of damage
Gangrene
Infected dead tissue
Hard to treat because the bacteria keeps spreading and growing while killing tissue.
-A form of coagulative necrosis that is characterized by a combination of impaired blood flow and bacterial invasion
The part of a cells DNA that are used to make copies of the cell are called?
Genes
When a cell is damaged and the DNA in that cell is altered and that cell doesn’t die, these mutations are called what?
Oncogenes
Dysplasia
- Abnormal growth
- The final cellular adaptation, in which cells mutate into cells of a different size, shape, and appearance
What is a promotor?
Clear divide when they are told to by a promotor
Neoplasm
- A mass of cells that form a growth
- A cellular growth that is no longer responding to normal regulatory processes, usually because of a mutation. Also called a tumour
Differentiation
- When a cell mutates so much that it loses its special function
- The process by which cells become specialized in terms of cell type, function, structure, and cell cycle.
Anaplasia
The loss of differentiation that occurs with cancer
The more anaplasia, the faster the cells divide
Tumour
The cellular growth that is no longer responding to normal regulatory processes. Also called a neoplasm
Cancer
The disease state associated with uncontrolled cellular growth. Key features include rapid, uncontrolled proliferation and loss of differentiation
Top risk factors associated with cancer
- genetics
- smoking
- lifestyle ( nutrition, obesity, exercise)
- radiation (ionizing or UV)
- carcinogens
- hormones
- age
3 main types of cancer treatments
Surgery
Chemo
Radiation
Prognosis
Likely course of the disease or the outcome
Remission
Signs of the disease are not evident
Refractory
Signs of the disease are not responding to treatment