🦠 β€’ Lesson 1.5 : Diseases, Immunity & Respiration (Bio) Flashcards

After this lesson, you will be able to describe pathogens, transmissions, vaccinations, as well as gas exchange in humans, and the types of respiration.

1
Q

What is a pathogen?

A

A pathogen is a disease-causing organism.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Describe a transmissible disease

A

A transmissible disease is a disease in which the pathogen can be passed from one host to another.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How can a pathogen be transmitted?

A

By direct contact, including through blood and other body fluids (ex. cough, sneeze).

Or Indirectly, including from contaminated surfaces, food, animals and air.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How does the skin defend against pathogens?

A

The skin acts as a barrier, preventing pathogens from entering the body.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How do hairs in the nose defend against pathogens?

A

Nose hairs trap dust and microbes, stopping them from entering the respiratory system.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How does mucus defend against pathogens?

A

Mucus traps bacteria and dust in the airways, preventing them from reaching the lungs.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How does stomach acid defend against pathogens?

A

Stomach acid kills most bacteria and viruses in food before they can cause harm.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How do white blood cells defend against pathogens?

A

White blood cells engulf pathogens (phagocytosis) and produce antibodies to destroy them.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Why is a clean water supply important in controlling disease?

A

Prevents the spread of waterborne diseases like cholera by removing harmful pathogens.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What factors help to prevent diseases?

A

Clean water supply,
Hygienic food preparation,
Good personal hygiene,
Proper waste disposal,
Sewage treatment.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the key features of viruses?

A

A Protein coat and Genetic material.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is active immunity?

A

The body produces its own antibodies to fight a pathogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Why do antibodies only work on specific pathogens?

A

Each pathogen has unique antigens with specific shapes, and antibodies have complementary shapes that fit these antigens.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What do antibodies do?

A

Antibodies bind to antigens or destroy pathogens directlyβ€”or mark them for phagocytes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How does the body develop active immunity?

A

After an infection, or through vaccination.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is introduced into the body during vaccination?

A

Weakened pathogens or their antigens.

17
Q

How does the body respond to a vaccine?

A

Lymphocytes recognize the antigens and produce antibodies.

18
Q

How does vaccination provide long-term immunity?

A

Memory cells are created, allowing the body to respond faster if exposed to the same pathogen again.

19
Q

What is the correct order of structures in the respiratory system?

A
  1. Larynx β†’ 2. Trachea β†’ 3. Bronchi β†’ 4. Bronchioles β†’ 5. Alveoli & Capillaries β†’ 6. Lungs β†’ 7. Diaphragm β†’ 8. Ribs β†’ 9. Intercostal Muscles
20
Q

How can we test for carbon dioxide in human breath?

A

Limewater test – Limewater turns cloudy when we breathe out, proving expired air has more COβ‚‚ than inspired air.

21
Q

What are the differences between inspired and expired air in humans?

A

Inspired Air: More oxygen, less carbon dioxide, less water vapor.

Expired Air: Less oxygen, more carbon dioxide, more water vapor.

22
Q

How does physical activity affect breathing rate and depth?

A

Increased COβ‚‚ in the blood is detected by the brain, which causes the rate and depth of breathing to increase to expel more COβ‚‚ and bring in more oxygen.

23
Q

Why is a large surface area important for gas exchange?

A

A large surface area allows more oxygen and carbon dioxide to be exchanged at once, increasing the efficiency of gas exchange.

24
Q

What are some uses of energy in living organisms?

A

Energy is used for:
* Muscle contraction
* Protein synthesis
* Cell division
* Growth
* Passage of nerve impulses
* Maintenance of a constant body temperature

25
Q

Describe Aerobic Respiration

A

Aerobic Respiration is the chemical reaction in cells that uses oxygen to break down nutrient molecules to release energy.

26
Q

Describe Anaerobic Respiration

A

Anaerobic Respiration is the chemical reaction in cells that break down nutrient molecules to release energy without using oxygen.

27
Q

What is the word equation for aerobic respiration?

A

glucose + oxygen β†’ carbon dioxide + water

28
Q

What is the balanced equation for aerobic respiration?

A

C6H12O6 + 6O2 β†’ 6CO2 + 6H2O

29
Q

What is the word equation for anaerobic respiration?

A

glucose β†’ lactic acid

30
Q

What is the difference in energy release between anaerobic and aerobic respiration?

A

Anaerobic respiration releases much less energy per glucose molecule than aerobic respiration.

31
Q

What happens during vigorous exercise regarding lactic acid?

A

Lactic acid builds up in muscles and blood during vigorous exercise, causing an oxygen debt.

32
Q

How is the oxygen debt removed after exercise in terms of heart rate?

A

Fast heart rate helps transport lactic acid in the blood from muscles to the liver.

33
Q

How is the oxygen debt removed after exercise in terms of breathing?

A

Deeper and faster breathing continues to supply oxygen for aerobic respiration of lactic acid.

34
Q

How is the oxygen debt removed after exercise in terms of lactic acid breakdown?

A

Aerobic respiration of lactic acid occurs in the liver after exercise to remove the oxygen debt.