PLTW Biomedical Science Final Study Guide (2024) Newest Questions and Answers (Verified Answers)
7 views 0 purchase
Course
PLTW
Institution
PLTW
What is a calorie?
Answer A unit of heat energy
2. With our crude calorimeters in class we burned food by lighting it on fire.
What chemical reaction occurs when food is burned? How does this reaction
relate to the breakdown of food for energy in our body?
AnswerA combustion reaction occurs.Th...
4. If the food sample you burned above had a mass of 10g before burning
and 8g after burning, how many calories/gram did the food contain?
Answer 1600 calories/2g = 800 calories/gram
5. We are expressing our calories calculated above as chemistry calories. How are
food calories different?
Answer 1 food Calorie = 1000 chemistry calories
6. Which macromolecules -- carbohydrates, proteins or lipids - have the high-
est calories/gram?
Answer Lipids have the highest 9 Calories/gram.
7. In our bodies the food we eat is broken down into its building blocks as it
passes through our digestive system. Answer the following questions about this
process
Where does digestion begin?
2 of 33 10/24/2024, 8:39
,PLTW Biomedical Science Final Study Guide.pdf file:///C:/Users/HP/Desktop/New%20folder%20(4)/PLTW%20Biome
Answer In the mouth with active chewing and the enzymes in saliva.
8. The enzymes amylase and lipase are found in saliva.Which macromolecules do
these enzymes break down?
Answer Amylase breaks down carbohydrates. Lipase breaks down lipids.
9. In the stomach, lipase and pepsin are secreted.Which macromolecule does
pepsin break down?
Answer Pepsin breaks down proteins.
10. What substance is made in the liver and stored in the gall bladder? What
does it do?
Answer Bile
it helps to dissolve (emulsify) lipids
11. The duodenum is part of which organ in the digestive system?
Answer The small intestine
12. Several enzymes are secreted into the duodenum, including trypsin and
3 of 33 10/24/2024, 8:39
,PLTW Biomedical Science Final Study Guide.pdf file:///C:/Users/HP/Desktop/New%20folder%20(4)/PLTW%20Biome
chymotrypsin.Which macromolecule do these enzymes break down?
Answer Trypsin and chymotrypsin break down proteins.
4 of 33 10/24/2024, 8:39
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller NurseFerian. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
