Understanding the Immune System

Liam introduces the immune system, explaining its role in defending against bacteria, fungi, and viruses. He describes the function of white blood cells, or leukocytes, in identifying and responding to threats. The immune response is triggered by antigens, leading to the activation of leukocytes, which are divided into lymphocytes and phagocytes. Phagocytes initiate the response, while lymphocytes produce antibodies to combat invaders. Symptoms like fever occur during this process, and managing fever is crucial. Vaccines help strengthen the immune system, a topic to be covered in a future video.

What is the primary function of the immune system?

• To regulate body temperature

• To produce energy

• To digest food

• To protect against pathogens

Which cells are primarily responsible for scanning tissues for suspicious signs?

• Red blood cells

• Neurons

• Leukocytes

• Platelets

What are the two main groups of leukocytes?

• Osteocytes and Chondrocytes

• Neurons and Glial cells

• Erythrocytes and Thrombocytes

• Lymphocytes and Phagocytes

What role do phagocytes play in the immune response?

• They digest invaders

• They store energy

• They transport oxygen

• They produce antibodies

How do lymphocytes contribute to the immune response?

• By breaking down fats

• By creating antibodies

• By producing hormones

• By transporting nutrients

What is the purpose of antibodies in the immune system?

• To neutralize antigens

• To store energy

• To provide structural support

• To transport oxygen

What symptom can occur as a result of the immune response?

• Increased appetite

• Decreased heart rate

• High temperature

• Low blood pressure

Why is it important to manage a fever during an immune response?

• To improve digestion

• To increase energy levels

• To prevent dehydration

• To avoid brain damage

What can weaken the immune system, making it unable to defeat some enemies?

• All of the above

• Excessive exercise

• Lack of sleep

• Poor diet

How do vaccines assist the immune system?

• By reducing stress

• By providing nutrients

• By stimulating antibody production

• By increasing body temperature