Insert Table Chart Text Shape Media 1. What is homeostasis? 2. What is the purpo
ID: 3483787 • Letter: I
Question
Insert Table Chart Text Shape Media 1. What is homeostasis? 2. What is the purpose/outcome of positive feedback loops? 3. What is the purpose/outcome of negative feedback loops? 4. Interpret a Feedback loop. -Identify Signal, Sensor (organ), Effector (organ), Integrator (organ) Intrinsic vs. Extrinsic signal -Predict effecets of reduced sensitivity (desensitization/tolerance) or increased effector activity 5. What causes hypoxia? 6. What is pH? 7. What are the cellular effect of hypoxia: 1. 2. 3. 4. Effect on ATP levels Effect on ion concentrations Effect on osmosis (will a cell swell with water or shrivel?) Effect on acidity (pH) (why?) 8. Necrosis vs. apoptosis 9. Metaplasia, atrophy, dysplasia, hypertrophy, hyperplasia 10. polar vs. non-polar molecules (think of some relevant examples). How do they interact with cells? 11. channel vs. pump vs. carrier (think of some relevant examples). Define them as active or passive. 12. Na/K atpase (pump) role: 13. Ionic balance at resting membrane potential: 2,032 wordsExplanation / Answer
1) Conditions in the body are controlled, to provide a constant internal environment. This is called homeostasis. this can also be defined as balance of bodily functions.
2)Positive feedback enhances an effect by it having an influence on the process which gave rise to it.
3)Negative feedback occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances.
5) hypoxia - means less oxygen
Causes lung damage due to trauma, Lung diseases such as chronic obstructive pulmonary disease (COPD), emphysema, bronchitis, pneumonia, and pulmonary edema (fluid in the lungs)
6)pH (potential of hydrogen) is a scale of acidity from 0 to 14. It tells how acidic or alkaline a substance is. More acidic solutions have lower pH. More alkaline solutions have higher pH. neutral solutions usually have a pH of 7.
8) apoptosis is a form of cell death that is generally triggered by normal, healthy processes in the body.
necrosis is cell death that is triggered by external factors or disease, such as trauma or infection.
9)Metaplasia is the reversible transformation of one differentiated cell type to another differentiated cell type.
Atrophy is the decrease in size of tissue or wasting away of tissue.
Dysplasia is the presence of an abnormal cell in a tissue
Hypertrophy is increase in size cells.
Hyperplasia is increase in number for cells