Biology And Disease Flashcards

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0
Q

What are non-infectious diseases?

A

Diseases caused by body malfunctions, lifestyle or environment
Examples - cancer, heart diseases

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1
Q

What are infectious diseases?

A

Diseases caused by pathogens

Examples - common cold, food poisoning

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2
Q

What does an acute disease mean?

A

Develops quickly, symptoms lasts a short time.

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3
Q

What does a chronic disease mean?

A

Develops slowly and symptoms last a long time

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4
Q

What are the risk factors associated with coronary heart disease?

A

Smoking
Poor diet (salt and saturated fat)
Lack of exercise
Alcohol

These damage blood vessels and lead to high blood pressure

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5
Q

What is a risk factor?

A

Things that increase the chance of you developing a disease is called a risk factor

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6
Q

What are the risk factors associated with cancer?

A

Smoking
Exposure to sunlight
Alcohol

These are associated with increasing the risk of developing many cancers eg mouth, liver and skin cancer

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7
Q

Why are men more likely to develop heart disease?

A

Women have the hormone oestrogen which protects them against heart disease, men do not have this.

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8
Q

Why, generally, is there more men with respiratory conditions and more men that develop lung cancer in today’s world?

A

More men building/ mining - associated with asbestos etc.

years ago, before people knew about the health risks, more men were smoking

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9
Q

How is risk measured?

A

Risk = (number of people with disease at a particular time) / (the population of people who could develop the disease)

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10
Q

What is a disease?

A

An abnormal condition of an organism that impairs it’s function and which is accompanied by a set of characteristics and symptoms

(Not a physical trauma i.e. An injury

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11
Q

What are pathogens?

A

Micro organisms that cause disease. - bacteria, viruses, fungi and Protozoa

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12
Q

How do pathogens cause disease?

A

By penetrating an organism’s interface with the environment

  • gas exchange system
  • the skin
  • digestive system
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13
Q

How do pathogens cause damage/disease to the human body?

A
  • produce toxins that are harmful molecules, damaging the human body
  • rupturing cells to release their nutrients
  • breaking down cell’s nutrients for their own use - the cell starves and dies
  • replicating inside the cells and bursting the cell when they are released
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14
Q

Prevention of disease methods - the gas exchange system

A
  • goblet cells (line the trachea) secrete mucus to catch the pathogens
  • hairs called cilia on the cells move he mucus to the mouth where it is removed
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15
Q

Prevention of disease methods - the digestive system.

A

Acidic conditions of the stomach kill the pathogens

16
Q

Prevention of disease methods - the skin

A

Blood clots and dries to form a scab, preventing pathogens entering the bloodstream