lqc 4 exam qs Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

A wound is an injury to living tissue. The healing of a wound involves an inflammatory phase. Explain the appearance of the wound in this phase.

A

red/swollen, because of increased blood flow to the area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

describe what is meant by a non specific response to infection

A

a response that is effective against a wide range of infectious agents, doesn’t involve recognition of infectious agent, doesn’t react to specific antigens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Using the fluid mosaic model of cell membranes, explain how a macrophage carries out phagocytosis of bacteria.

A

membrane receptors interacts with bacteria, pseudopodia formed around the bacteria, membranes of pseudopodia fuse to form a vacuole, change in shape of membrane is due to fluidity of membrane, caused by movement of phospholipids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

explain how macrophages present antigens to T helper cells

A

macrophage binding to T helper cell, MHC on macrophage, CD4 receptor on T cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The human body responds to infection by viruses in a number of ways. The non-specific response involves interferon. Explain the importance of interferon in the body’s response to infection by viruses

A

prevents viruses attaching to uninfected host cells, by binding to receptors, therefore preventing viruses from entering cell so viruses can’t replicate and infect more cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly