What was life like in 19th century England?
By the late 19th century, all kinds of people lived in the cities. Labourers and servants were the most numerous. Although some became better-off, many were still poor. They lived in cramped, decaying houses, known as slums.
What was Britain’s population in 1850?
Between the extremes, the population of England and Wales expanded 2.9 times, from about 6.1 million in 1750 to 17.9 million in 1851.
What was Britain like in the 1900s?
There was very poor sanitation in the 1900’s and overcrowding was also another main issue. There was unequal distribution of resources. There was a lack of good housing and government support and welfare. The economy was very good in the 1900’s because of the Industrial Revolution and the British empire.
Why did the population increase in 19th century Britain?
In conclusion, the rapid population growth in Britain in the nineteenth century was caused by several different reasons such as: fertility rate, mortality rate, healthcare, emigration, migration, occupation, and other economical aspects.
What was Britain’s population in 1900?
30.5 million
Which Two factors determine the size of population?
Population Growth Rate The two main factors affecting population growth are the birth rate (b) and death rate (d).
What determines the size of the population?
Two important measures of a population are population size, the number of individuals, and population density, the number of individuals per unit area or volume. Ecologists estimate the size and density of populations using quadrats and the mark-recapture method.
What are the consequences of overpopulation?
Overpopulation leads to eco- degradation by: increasing air, water, soil and noise pollution; unhygienic conditions; deforestation leading to floods and soil erosion.
Which two factors determine the severity of the disease?
Our immune system is a major factor that determines the number of microbes surviving in the body. So if the quantity of microbes in the body is less, then the severity is low whereas if the number of microorganisms is high, then the disease may be fatal or severe.
What are the two factors that affect the strength of disease manifestation?
Studies have indicated that immunological defences against various infectious diseases may be highly influenced by complex interactions of environmental and host genetic factors e.g. MHC class I and II, also known as human leucocyte antigen (HLA).
What are the two ways of treating an infectious disease?
How are infectious diseases treated?
- If bacteria cause a disease, treatment with antibiotics usually kills the bacteria and ends the infection.
- Viral infections are usually treated with supportive therapies, like rest and increased fluid intake.
What are the factors on which severity of disease manifestation depends?
The severity of the disease manifestations depends on the number of microbes present in the body. Smaller is the number of microbes in the body, lesser are the symptoms of a disease. On the contrary, if microbe exists in large number in the body, disease can be severe and life-risking.
What do signs and symptoms indicate?
Signs and symptoms are abnormalities that can indicate a potential medical condition. Whereas a symptom is subjective, that is, apparent only to the patient (for example back pain or fatigue), a sign is any objective evidence of a disease that can be observed by others (for example a skin rash or lump).
How does number of microbes determine the severity of disease manifestation?
Answer: The number of disease-causing microbes in the body decide the severity of disease manifestation. If the number of microbes is very small, the disease manifestations may be minor and even go unnoticed. In fact if the number of microbes is very large, the disease can even be fatal.
What do you mean by immediate cause of disease?
Immediate cause: The organisms that enter our body and cause the disease are termed as an immediate cause. For example, virus, bacteria, protozoa etc. Contributory cause: The secondary factors which led these organisms enter our body are termed as a contributory cause.
Why do we fall ill revision notes?
(ii) Non-infectious Diseases: The disease which does not spread by contact between infected and healthy person through air and water, is called non-infectious disease….Study Material and Notes of Ch 13 Why Do We Fall ill Class 9th Science.
| Infectious Agents | Diseases |
|---|---|
| Fungi | Skin infections |
What are the two types of immediate causes of diseases?
| Immediate Causes | Contributory Causes |
|---|---|
| 2. Example: Pathogens such as virus, bacteria, fungi, etc. | 2. Example: poor nourishment, unhygienic environment, pollutants, etc. |
What are the two causes of diseases?
Infectious diseases can be caused by:
- Bacteria. These one-cell organisms are responsible for illnesses such as strep throat, urinary tract infections and tuberculosis.
- Viruses. Even smaller than bacteria, viruses cause a multitude of diseases ranging from the common cold to AIDS.
- Fungi.
- Parasites.
What are the three levels of causes of diseases?
- Immediate cause: The organisms that enter our body and cause the disease are termed as an immediate cause. For example, virus, bacteria, protozoa etc.
- Contributory cause: The secondary factors which led these organisms enter our body are termed as a contributory cause.
Why do we fall ill Questions?
These diseases can be transmitted from an infected person to a healthy person. 1. These diseases cannot be transmitted. 2….Why Do we Fall Ill Class 9 Extra Questions Short Answer Questions-II.
| Vitamin | Deficiency Diseases |
|---|---|
| K | Bleeding disease |