<p>Hey, I’ve been solving some FRQs lately to prepare, and how come on the question it says
‘provide one example’,
but on the answer key (grading sheet/checklist whatever you call it), you have to give 3~4 examples to earn full credits for the question…?
Thanks!</p>
<p>There is most likely more than one example to what they are looking for.</p>
<p>Suppose they are looking for one example of a negative feedback system. Of course there are many. Thus, the grading key may list things such as 1) Blood sugar/glucagon/insulin, 2) Body Temperature/Sweat, 3) RAAS in Kidney, 4) Dehydration and ADH etc.</p>
<p>As long as you provide a valid example of negative feedback, you should receive credit.</p>
<p>Can you provide a link to the exact question you’re looking at? If there are multiple points involved, they may want an explanation of the response or something else. If you can post the specific question, I can help you further.</p>
<p>Hey, thanks for the reply!
I was just solving the FRQs in the prepbook (barrons).
So this is one of the questions on there:
Living things strive to maintain homeostasis. Describe what a feedback mechanism is. Choose one positive and one negative feedback mechanism in humans, and explain how they help maintain homeostasis.
and this is a part of the checklist on ‘example of negative feedback’:
Examples of negative feedback
1 pt : anterior pituitary->thyroid->thyroxin when thyroxin levels are low
1 pt : increase in glucagon when blood sugar is too low
1 pt : Increase in insulin when blood sugar is too high
etc etc blablah</p>
<hr>
<p>5 pts maximum.</p>
<p>So in this case, if I explained about how glucagon works, would I only get 1 point out of 5 possible points because I only mentioned about glucagon, or will I still get 5 points because I elaborated on how glucagon works…?</p>
<p>This is my first AP test, so I don’t have much info on how gradings work… o_o</p>
<p>That’s funny – I don’t even have the Barron’s book, and I used negative feedback as the example in my previous post!</p>
<p>From what it seems, they are dividing the 5 points as follows:
- 1 Point for describing a feedback mechanism.
- 1 Point for an example of a positive feedback mechanism
- 1 Point for explaining how this positive feedback mechanism maintains homeostasis.
- 1 Point for an example of a negative feedback mechanism
- 1 Point for explaining how this negative feedback mechanism maintains homeostasis.</p>
<p>If you only said that glucagon and blood sugar is an example of a negative feedback system, you would get 1 point. If you then expanded about HOW this negative feedback system works in the body (i.e. pancreases beta/alpha cells secrete insulin/glucagon that target receptors on the liver. Insulin decreases blood sugar by having the liver store extra sugar as glycogen, whereas glucagon instructs the liver to break down glycogen as an extra energy source when blood sugar levels are low), then you will get the second point for that part.</p>