This is a one-hundred-and-thirty-mark exam that covers the topics of homeostasis and respiration. It has twelve questions allocated to it and the questions vary in style and ability. The exam is designed for high schools students studying life sciences. A full and comprehensive mark scheme is also ...
The question paper consists of 12 questions.
Answer all the questions.
Number the answers correctly according to the numbering system used on this question
paper.
,Questions
Q1.
Aerobic respiration is the process that releases energy for use in the body.
(a) Give the word equation for the process of aerobic respiration.
(4)
.................................... + ...................................... → .....................................
+ .................................... + energy
(b) A spirometer is used to measure the volumes of air breathed in and the volumes of air
breathed out.
The spirometer trace shows the readings taken of a person at rest.
(i) Calculate the rate of breathing between points A and B shown on the trace.
(2)
rate = ........................................................... breaths per minute
(ii) Calculate the difference in the volume of air breathed in and the volume of air
breathed out between points B and C.
(3)
difference in volume = ........................................................... dm 3
,(c) Describe the differences that would be seen in the trace between points A and B if the
person had been exercising vigorously before the readings were taken.
(2)
.............................................................................................................................................
The diagram shows an alveolus and its blood supply.
(a) (i) What is the name of blood component X?
(1)
A plasma
B platelet
C red blood cell
D white blood cell
(ii) State three ways in which air in the alveolus differs from air in the atmosphere.
(3)
1 .......................................................................................................................................... ...
..........................................................................................................................................
2 .......................................................................................................................................... ...
..........................................................................................................................................
3 .......................................................................................................................................... ....
.........................................................................................................................................
(iii) Give three features of alveoli that allow efficient gas exchange.
(3)
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 syeblues. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.61. You're not tied to anything after your purchase.