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COMPREHENSIVE EXAM BIOS255 LATEST WITH ACTUAL QUESTIONS AND CORRECT ANSWERS, Exams of Nursing

COMPREHENSIVE EXAM BIOS255 LATEST WITH ACTUAL QUESTIONS AND CORRECT ANSWERS Bios255 exam questions Comprehensive exam Bios255 Bios255 latest exam questions Actual Bios255 exam questions Bios255 study guide Bios255 exam preparation Bios255 correct answers Bios255 exam solutions Bios255 practice test Bios255 exam review Latest Bios255 exams Bios255 test prep Bios255 exam help Bios255 question answers Bios255 exam guide Bios255 revision materials Bios255 test questions Bios255 mock exam Updated Bios255 questions Bios255 exam tips Bios255 practice questions Bios255 sample questions Bios255 online exam Bios255 question bank Bios255 exam practice Bios255 quiz questions Bios255 exam tutorial Bios255 assessment questions Effective Bios255 study methods

Typology: Exams

2024/2025

Available from 04/30/2025

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1. What is homeostasis ns The process by which organisms maintain a relatively stable internal environment. 2. What does homeostasis involve Ans control systems that keep your internal envi- ronment roughly constant with certain limits 3. Why is it vital to keep your internal evironment constant Ans to keep cells functioning normally and to prevent damage 4. What are the three key things that are important to maintain Ans temperature ph and glucose 5. Why is it important to maintain body temp Ans if temp becomes to high enzymes become dennatured. Enzymes molecules vibrate too much and the H bonds that hold their 3D shape break changing the shape of the active site so enzyme can no longer work as a catalyst. Therefore metabollic reactions are less efficient. 6. Why is it important to maintain blood PH Ans if blood ph is too high or low enzymes become dennatured. The H bonds are effected and the 3D shape is changed changing the shape of the active site meaning the enzyme no longer works as a catalyst. Therefore metabollic reactions are less efficient. 7. What is the optimum PH Ans usually 7 but in the stomach its lower 8. Why is it important to maintain blood glucose Ans If blood glucose conc is too high then water potential of blood = reducedso water molecules diffuse out of cells and into blood by osmosis. This causes the cells to shrivel up and die. If glucose is too low cells= unable to carry out normal activities as theere isnt enough glucose for respiration to provide energy. 9. What do homeostatic Systems do Ans detect a change and respond by negative feedback 10. What does the homeostatic system involve Ans receptors a coomunication sys- tem and effectors 11. What is negative feedback Ans the mechanism that restores the level to normal receptors detect whether the levels of something are too high the nervous system or hormonal system send info to the effectors and the effectors respond to counteract the change 12. Where does negative feedback work Ans within certain limits if the change is too big the effectors wont be able to counteract it 13. What do multiple negative feeback mechanisms do Ans give more control 14. Why does homeostasis involve multiple negative feedback mechanisms Ans - to control each thing because more than one mechanism gives more control over the changes in the internal environment 15. Why have multiple negative feedback mechanisms Ans to actively increase or decrease a level so it returns to normal 2/3