PSL 250 FINAL UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

PSL 250 FINAL UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS

Question:
1. Homeostasis
Answer:
The ability of an organism to maintain a relatively constant internal environment despite changing internal
or external conditions.

Question:
2. Components of Homeostatic System
Answer:
Stimulus -> Receptor -> Control Center -> Effector

Question:
3. Negative Feedback
Answer:
The resulting action will be in the opposite direction of the stimulus (most common).

Question:
4. Positive Feedback
Answer:
A homeostatic mechanism where the response enhances or amplifies the original stimulus, moving the
system further away from the starting point.

Question:
5. Stimulus
Answer:
A change occurs in the body.

Question:
6. Receptor
Answer:
Detects the change.

Question:
7. Control Center
Answer:
Processes the information and signals the effectors.

Question:
8. Effector
Answer:
Enhances the original change.

, Question:
9. Amplification
Answer:
The response strengthens until a goal or endpoint is reached.

Question:
10. Termination
Answer:
The loop ends once the goal is achieved.

Question:
11. Dissociate
Answer:
When a molecule splits into smaller particles (ions) in solution.

Question:
12. Anion
Answer:
A negatively charged ion (gained electrons).

Question:
13. Cation
Answer:
A positively charged ion (lost electrons).

Question:
14. Solvent
Answer:
The substance that does the dissolving.

Question:
15. Solute
Answer:
The substance that is dissolved.

Question:
16. Solution
Answer:
A uniform mixture of solute and solvent.

Question:
17. Acid
Answer:
A substance that releases hydrogen ions (H■) in solution.