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Science 30: Unit A
1
Assignment Booklet A1
ASSIGNMENT BOOKLET A1
SCIENCE 30: UNIT A
CHAPTER 1 ASSIGNMENT
This Assignment Booklet is worth 58 marks out of the total 134 marks for the assignments
in Unit A. The value of each assignment and each question is stated in the left margin.
Read all parts of your assignment carefully, and record your answers in the appropriate
places. If you have difficulty with an assignment, go back to the textbook and review the
appropriate lesson. Be sure to proofread your answers carefully before submitting your
Assignment Booklet.
(58 Marks)
(3 marks)
Chapter 1 Assignment: Circulation and Immunity
1. Match the following parts of the heart. Place your answers in the blanks provided.
a.
b.
c.
d.
e.
f.
aorta
right ventricle
pulmonary vein
septum
semilunar valve
vena cava
Science 30: Unit A
(3 marks)
2
2. Match each function with the appropriate structures listed. Place your answer in the
blanks provided.
i.
ii.
iii.
iv.
v.
vi.
collects deoxygenated blood from the body
maintains the proper direction of the blood through the heart
receives oxygenated blood from the lungs
sends deoxygenated blood to the lungs
sends oxygenated blood to the body
separates the left and right halves of the heart
a.
b.
c.
d.
e.
f.
(2 marks)
any heart valve
aorta
pulmonary artery
pulmonary vein
vena cava
septum
3. Decide whether each statement is true (T) or false (F). Place your answer in the
blank space given.
a.
b.
c.
d.
(2 marks)
Assignment Booklet A1
All arteries carry oxygenated blood and all veins carry deoxygenated
blood.
The heart rate increases as a person who was initially at rest starts
exercising.
The flow of blood in the body is due to a back-and-forth motion
caused by tidal forces.
The “lub-dub” heart sound that a doctor hears through a stethoscope
comes from the heart valves.
4. There is a difference in the action of the heart chambers during the processes of
systole and diastole. Describe this difference.
Answer:
(2 marks)
5. An athlete has a stroke volume of 85 mL per heartbeat and a heart rate of 64 beats
per minute. Calculate, in litres, the volume of blood pumped over one year.
Answer:
Return to page 4 of the Distributed Learning Student Guide, and begin Lesson 1.2.
Science 30: Unit A
3
Assignment Booklet A1
For questions 6 to 10, read each question carefully. Decide which of the choices BEST
answers the question. Place your answer in the blank space given.
(1 mark)
6. Suppose an anesthetic enters a capillary below the skin and continues its journey
through structures of the circulatory system. Along what sequence of structures does
the anesthetic continue its journey?
A.
B.
C.
D.
vein, artery, heart, venule, arteriole
arteriole, venule, heart, artery, vein
venule, arteriole, heart, vein, artery
venule, vein, heart, artery, arteriole
Answer:
(1 mark)
7. What factor should be the manipulated variable in an investigation studying the effects
of caffeine on heart rate?
A.
B.
C.
D.
amount of caffeine consumed
temperature of the room
blood pressure
heart rate
Answer:
(1 mark)
8. A person’s circulatory system can be compared to a municipality’s water delivery
system. If the pipes from the pump to a block of houses can be thought of as arteries
and the pipes inside the house as capillaries, what should the pipes carrying water into
the home be called?
A.
B.
C.
D.
veins
aortas
venules
arterioles
Answer:
Science 30: Unit A
(1 mark)
4
Assignment Booklet A1
9. Where does the fluid pressure of blood fluctuate the most?
A.
B.
C.
D.
veins
venules
arteries
arterioles
Answer:
(1 mark)
10. A doctor reported a patient’s blood pressure to be 120/80. What was the patient’s
systolic blood pressure?
A.
B.
C.
D.
40 mmHg
80 mmHg
120 mmHg
200 mmHg
Answer:
(2 marks)
11. While the heart’s chambers are relaxing, there is still residual pressure in the
arteries. Give a reason for this pressure.
Answer:
(2 marks)
12. A doctor uses a sphygmomanometer to measure a patient’s blood pressure. The
doctor pumped up the cuff somewhat above the expected blood pressure. Then the
doctor released the air slowly while listening for a pulse through a stethoscope.
Describe how the change in the sound coming through the stethoscope is used to
obtain blood pressure measurements.
Answer:
Science 30: Unit A
(3 marks)
5
Assignment Booklet A1
13. Describe the role of the valves in leg veins.
Answer:
Return to page 6 of the Distributed Learning Student Guide, and begin Lesson 1.3.
For questions 14 to 16, read each question carefully. Decide which of the choices BEST
answers the question. Place your answer in the blank space given.
(1 mark)
14. When a blood sample is spun in a centrifuge, the blood separates into layers. Which
blood component will occupy the top half of the sample?
A.
B.
C.
D.
plasma
platelets
white blood cells
red blood cells
Answer:
(1 mark)
15. Which blood component is responsible for starting the clotting process?
A.
B.
C.
D.
plasma
platelets
white blood cells
red blood cells
Answer:
(1 mark)
16. Which blood component provides protection against disease-causing bacteria that
have invaded the body?
A.
B.
C.
D.
plasma
platelets
white blood cells
red blood cells
Answer:
Science 30: Unit A
(3 marks)
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Assignment Booklet A1
17. Explain why paleness, weakness, and fatigue may result from a diet lacking iron.
Answer:
(3 marks)
18. Explain why exposure to carbon monoxide can be fatal.
Answer:
Return to page 8 of the Distributed Learning Student Guide, and begin Lesson 1.4.
For questions 19 and 20, read each question carefully. Decide which of the choices BEST
answers the question. Place your answer in the blank space given.
(1 mark)
19. Scurvy is a disease now known to be caused by a lack of vitamin C. What food in
the traditional diet of Inuit people prevented scurvy?
A.
B.
C.
D.
limes
sea salt
maktaaq
pemmican
Answer:
(1 mark)
20. The fat in which of the following food sources has a positive effect on blood
cholesterol?
A.
B.
C.
D.
meat from marine animals
cheddar cheese
egg yolk
lard
Answer:
Science 30: Unit A
(2 marks)
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Assignment Booklet A1
21. Match each description with the appropriate term listed. Place your answer in the
blank space given.
i. angina
iii. stroke
ii. heart attack
iv. atherosclerosis
a. a chest pain due to the narrowing of vessels supplying blood to heart
tissues
b. the death of heart cells due to blockage in the coronary arteries
c. a loss of brain function due to an area of the brain deprived of blood
d. a hardening of the arteries due to fatty deposits
(2 marks)
22. Two people obtained the results of a blood cholesterol test. Their results were as
follows.
Person
Low-Density Lipoprotein (LDL)
High-Density Lipoprotein (HDL)
1
3.1
2.0
2
4.1
1.1
Which person has the healthier cholesterol level? Why?
Answer:
(4 marks)
23. Explain why a rough, cracked coating of plaque on the interior walls of arteries can
cause blood clots to form.
Answer:
(2 marks)
24. Name four lifestyle choices that increase the risk of cardiovascular disease.
Answer:
Return to page 9 of the Distributed Learning Student Guide, and begin Lesson 1.5.
Science 30: Unit A
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Assignment Booklet A1
For questions 25 to 28, read each question carefully. Decide which of the choices BEST
answers the question. Place your answer in the blank space given.
(1 mark)
25. In an immune response, which part of the immune system binds to antigens on the
surface of a macrophage and sends out a chemical messenger that coordinates the
action of the other immune-system cells?
A.
B.
C.
D.
B-cells
killer T-cells
helper T-cells
suppressor T-cells
Answer:
(1 mark)
26. During an immune response, some cells of the immune system expose antibodies
and, thereby, cause pathogens to be immobilized and form clumps. Which cells of
the immune system have this function?
A.
B.
C.
D.
B-cells
killer T-cells
macrophages
suppressor T-cells
Answer:
(1 mark)
27. Which cells signal the end of an immune response after target pathogens have been
destroyed?
A.
B.
C.
D.
B-cells
macrophages
memory T-cells
suppressor T-cells
Answer:
Science 30: Unit A
(1 mark)
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Assignment Booklet A1
28. Which cells of the immune system cause the system to respond more quickly to
re-infection by the same pathogen?
A.
B.
C.
D.
memory B-cells and memory T-cells
memory B-cells
memory T-cells
helper T-cells
Answer:
(2 marks)
29. Match each description with the appropriate term listed. Place your answer in the
blank space given.
i. athlete's foot
iii. chicken pox
a.
b.
c.
d.
(3 marks)
ii. food poisoning
iv. malaria
fungi
viruses
bacteria
protozoans
30. Explain how a vaccination can provide immunity from a disease.
Answer:
(2 marks)
31. Explain how the immune system is responsible for the symptoms of rheumatoid
arthritis.
Answer:
Science 30: Unit A
(2 marks)
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Assignment Booklet A1
32. Explain how the pathogenic salmonella bacterium enters the human body by
overcoming the body’s natural defences.
Answer:
Submit your completed Assignment Booklet A1 to your teacher for assessment.
Then return to page 11 of the Distributed Learning Student Guide,
and begin the Chapter 1 Summary.