Human health and Disease Video Lecture | Crash Course for UAE Grade 12

Ans. Lifestyle habits play a crucial role in determining human health. Poor lifestyle choices such as a sedentary lifestyle, unhealthy diet, smoking, excessive alcohol consumption, and lack of sleep can increase the risk of various diseases. On the other hand, adopting a healthy lifestyle, including regular exercise, balanced diet, adequate sleep, and avoiding harmful habits, can significantly improve overall well-being and reduce the chances of developing diseases.

Ans. Infectious diseases can be caused by various factors. The most common causes include bacteria, viruses, fungi, and parasites. These microorganisms can enter the body through various means such as contaminated water or food, insect bites, direct contact with an infected person, or even through the air. Poor hygiene practices, lack of vaccination, and compromised immune system can also increase the susceptibility to infectious diseases.

Ans. The immune system is a complex network of cells, tissues, and organs that work together to defend the body against harmful pathogens and diseases. It recognizes and eliminates invading microorganisms such as bacteria, viruses, and fungi, as well as abnormal cells. The immune system achieves this by producing specialized cells and proteins that target and destroy these foreign substances. Additionally, the immune system has a memory component that helps it respond more effectively to repeated encounters with the same pathogen.

Ans. Non-communicable diseases (NCDs) are often caused by a combination of genetic, environmental, and lifestyle factors. Some common risk factors for NCDs include unhealthy diet, lack of physical activity, tobacco use, excessive alcohol consumption, obesity, high blood pressure, high cholesterol levels, and stress. These risk factors can contribute to the development of chronic diseases such as cardiovascular diseases, diabetes, certain types of cancers, and respiratory disorders.

Ans. Preventing the spread of infectious diseases is essential to protect oneself and others. Here are some preventive measures: 1. Practice good hygiene: Wash hands frequently with soap and water, especially before eating or preparing food, after using the restroom, and after coughing or sneezing. Use hand sanitizers when soap is not available. 2. Follow respiratory etiquette: Cover your mouth and nose with a tissue or your elbow when coughing or sneezing, and dispose of tissues properly. Avoid close contact with individuals who have respiratory symptoms. 3. Get vaccinated: Vaccination is a crucial step in preventing infectious diseases. Stay updated on recommended vaccines for various diseases. 4. Maintain a clean environment: Keep your surroundings clean and regularly disinfect frequently touched surfaces like doorknobs, light switches, and mobile phones. 5. Practice safe food handling: Cook food thoroughly, avoid consuming raw or undercooked meat and eggs, and practice proper food storage and hygiene while handling and preparing food. Remember, prevention is always better than cure when it comes to infectious diseases.