Final Test Flashcards
Cancer
Diseases in which certain cells undergo uncontrolled growth.
Metastasis
Cancer cells leaving their place of origin, acquire the ability to get into blood vessels/pass through lymphatic wall and then find a comfortable home to establish a new cancer colony.
What process helps us determine whether cancer is malignant or benign?
Metastasis. Benign cancer will not metastasize.
Stage 0 cancer
Early form of cancer characterized by the cells being present only in the location where they had initially formed.
Stage 1 cancer
Localized to a single part of the body and have not grown into nearby tissues.
Stage 2 cancer
Still local, but more advanced
Stage 3 cancer
Locally advanced but involved lymph nodes being affected
Stage 4 cancer
Cancer that has metastasized
Treatments against cancer
- Surgery to remove cancerous mass
- Chemotherapy and radiation (causes damage to cancer cell DNA and inhibit enzymes needed for their growth)
Immune surveillance hypothesis
Immune system is on the alert for pathogens, when it finds something bad it goes into action
Sinoatrial node
Natural heart pacemaker - sets rate and timing for cardiac muscle cells to contract
Right atrium
Collection of de-oxygenated blood pumped from periphery (via the superior and inferior vena cavae) into right ventricle then to the lungs where CO2 is removed and O2 is added.
Left atrium
Receives oxygenated blood from lungs, pumps into left ventricle which then drives it to the body via the aorta.
Blood pressure
systolic bp/diastolic bp (typically 120/80)
Systolic bp
peak pressure in arteries when ventricles are contracting, pushing blood to the rest of body
Diastolic bp
Minimum pressure present when ventricles are filled with blood, before pressure of the heart is applied
Arteries
carries o2 blood to organs
veins
carries co2 blood to heart