Biology Human Health & Diseases part 15 (Active & Passve Immunity, Humoral & CMI) class 12 XII

TL;DR

This video discusses the different types of acquired immunity, including humoral immunity and cell-mediated immunity, as well as active and passive immunity.

Transcript

hello friends this video on human health and disease is part 15 is brought to you by exam feel calm no more fear from exam now let us again talk about the different types of acquired immunity now before this we spoke about the two types of immunity that is innate immunity and acquired immunity now let us see what are the types of acquired immunity ... Read More

Key Insights

• 🎛️ Acquired immunity has two main types: humoral immunity, controlled by B cells and antibody production, and cell-mediated immunity, controlled by T cells.
• ▶️ B cells play a crucial role in humoral immunity by producing antibodies, while T cells recognize antigens on infected cells and stimulate B cells.
• ☢️ Active immunity involves the production of antibodies in response to antigens, either naturally through disease or artificially through vaccination.
• ❓ Passive immunity occurs when ready-made antibodies are introduced into the body through breastfeeding, placental transfer, or injections.
• 💆 Examples of active immunity include not getting infected with a disease again and vaccination, while examples of passive immunity include receiving antibodies from the mother or through injections.
• 🛰️ Both natural and artificial active and passive immunity can occur.

Questions & Answers

Q: What are the two types of acquired immunity?

The two types of acquired immunity are humoral immunity and cell-mediated immunity. Humoral immunity is controlled by antibody production by B cells, while cell-mediated immunity is mediated by T cells.

Q: How do B cells and T cells play a role in the immune response?

B cells are responsible for producing antibodies, while T cells can recognize antigens on infected cells and stimulate B cells to produce antibodies. T cells also play a role in activating other T cells and B cells.

Q: What is the difference between active and passive immunity?

Active immunity involves the production of antibodies in the host body when exposed to antigens, either naturally through disease or artificially through vaccination. Passive immunity, on the other hand, involves the injection of ready-made antibodies into the body.

Q: Can you give examples of active and passive immunity?

Examples of natural active immunity include not getting infected by a disease a second time and the production of antibodies in response to a pathogen. Artificial active immunity includes vaccination. Natural passive immunity involves the transfer of antibodies from mother to baby through breastfeeding or the placenta. Artificial passive immunity occurs when antibodies are injected into a person, such as in the case of rabies.

Summary & Key Takeaways

• The video explains the two types of acquired immunity, humoral immunity and cell-mediated immunity, and discusses the role of B cells and T cells in the immune response.

• It also describes active immunity, where antibodies are produced in the host body when exposed to antigens, and passive immunity, where ready-made antibodies are injected into the body.

• The video provides examples of both natural and artificial active and passive immunity, including vaccines and the transfer of antibodies from mother to baby.