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BIOS 255 Comprehensive Exam 4 ( Latest 2024 / 2025 ) Actual Questions and Answers 100% Correct
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BIOS 255 Comprehensive Exam 4 ( Latest 2024 / 2025 ) Actual Questions and Answers 100% Correct
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BIOS 255 Comprehensive Exam 4By ExamNavigator
, BIOS 255 Comprehensive Exam 4
1. Negative feedback
Answer: A process in which the body sense change and activates amechanism to reverse it
2. Examples of negative feedback
Answer: Thermoregulation, blood sugar retention,blood pressure regulation
3. Positive feedback
Answer: Feedback that enhances the stimuli
4. Example of positive feedback
Answer: Giving birth
5. Blood plasma does what?
Answer: Produces antibodies
6. Muscle contraction order
Answer:
1. Cross bridge formation requires Ca+ & ATP
2. Ca+ binds to troponin complex
3. Conformation change in troponin Ca+/ tropomyosin exposed binding sites on Gactin
subunit
4. Myosin head binds to G-actin subunit release of ADP + Pi triggers "power-stroke"
5. ATP Binding & dissociation of actin & myosin
6. Myosin heads do a powerstroke (using ADP and P) which slides actin anddecreases length
of sarcomere (Z line to Z line)
7. Osteoblasts function
Answer: Bone formation
8. What type of joint is the knee?
Answer: Hinge joint
9. What type of immunity do you get after a vaccine with antibodies?
Answer: Artificialacquired active immunity
10. How does pH and body temperature affect the affinity of hemoglobin andoxygen?
Answer: Decreases the affinity for hemoglobin to oxygen (meaning oxygen will less likely
stick to hemoglobin)
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