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BIOS 255 Comprehensive Exam 2 ( Latest 2024 / 2025 ) Actual Questions and Answers 100% Correct
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BIOS 255 Comprehensive Exam 2 ( Latest 2024 / 2025 ) Actual Questions and Answers 100% Correct
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BIOS 255 Comprehensive Exam 2By ExamNavigator
, BIOS 255 Comprehensive Exam 2
1. What is homeostasis?
Answer: maintenance of a stable internal environment with thecontribution of all organ
systems
2. What are the components of a homeostatic mechanism?
Answer:
-Stimulus
-Receptors
-Control center
-Effector
-Response
3. What is a negative feedback mechanism?
Answer: Body REVERSES, or goes against,an original stimulus to return to homeostasis
Example: Blood glucose regulation after eating.
4. What is a positive feedback mechanism?
Answer: Amplifies the change from thenormal level. (Agrees with the change)
Example: Childbirth, blood clotting
5. What feedback mechanism is most common?
Answer: negative
6. Inferior
Answer: Below; at a lower level
7. Superior
Answer: Above; higher level
8. Lateral
Answer: Side; Away from the midline of the body
9. Proximal
Answer: Closer to the point of attachment
10. Distal
Answer: Father away from the point of attachment
, 11. Medial
Answer: Toward the midline of the body
12. Sagittal
Answer: divides body into left and right
13. Transverse
Answer: Divides body into upper and lower parts
14. Anterior
Answer: toward the front of the body
15. Posterior
Answer: toward the back of the body
16. Frontal plane
Answer: Divides the body into anterior (front) and posterior (back) portions.
17. Which part of the atom is involved in chemical reactions?
Answer: Electrons
18. Which part of the atom makes up the atomic number?
Answer: Protons
19. pH scale
Answer: Measurement of hydrogen ion concentration
- pH < 7: Acidic
-pH > 7: Alkaline (basic)
-pH = 7: neutral
20. What is the main function on rough endoplasmic reticulum?
Answer: Protein syn-thesis
21. What kind of cell division results in a diploid, increasing the number ofcells?
Answer: Mitosis
22. How many pairs of chromosomes do humans have?
Answer: 23 pairs
23. What kind of cell division results in a haploid?
Answer: Meiosis
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