Viruses and Cells The Intricate Dance of Infection and Immunity

The video explains how viruses, such as the flu, are transmitted through sneezing and enter the human body. It details the process of how a virus attaches to a cell, enters it, and uses the cell's machinery to replicate itself. Despite the rapid multiplication of viruses, the human body has a vast number of cells and an immune system that helps keep the virus in check. The video concludes by emphasizing the balance between virus spread and immune response.

What is the primary way viruses are transmitted from one person to another in the video?

• Through insect bites

• By touching contaminated surfaces

• Via droplets from a sneeze

• Through direct contact with blood

What do the 'keys' on the virus surface do?

• They make the virus invisible to the immune system

• They destroy the cell's membrane

• They allow the virus to attach to the cell

• They help the virus to float in the air

How does the virus enter the cell once it attaches?

• It dissolves the cell membrane

• It is engulfed by the cell

• It uses a syringe-like structure

• It waits for the cell to die

What role does the big pink molecule play in the virus replication process?

• It copies the virus's genetic material

• It signals the immune system

• It destroys the virus

• It transports the virus out of the cell

What happens to the virus after it is replicated inside the cell?

• It becomes inactive

• It is expelled from the cell

• It integrates into the cell's DNA

• It is destroyed by the cell

Why doesn't the body succumb to the virus immediately despite rapid replication?

• The virus is not harmful

• The virus is quickly expelled from the body

• The body has a large number of cells

• The virus is slow to replicate

How does the immune system respond to viral infections?

• By producing antibodies

• By increasing body temperature

• By reducing blood flow

• By causing inflammation

What is the main reason viruses want to spread?

• To become more complex

• To change their structure

• To increase their size

• To find new hosts

What keeps the virus spread in check most of the time?

• The virus's short lifespan

• The body's immune system

• The lack of available cells

• The virus's inability to replicate

What is the ultimate outcome of the interaction between viruses and the immune system?

• The immune system always wins

• The virus always wins

• A balance is maintained

• The virus mutates into a harmless form