Written by students who passed Immediately available after payment Read online or as PDF Wrong document? Swap it for free 4.6 TrustPilot
logo-home
Summary

Summary AQA ALEVEL BIOLOGY NOTES ON HIV AS LEVEL

Rating
-
Sold
-
Pages
3
Uploaded on
02-07-2023
Written in
2022/2023

ALEVEL NOTES ON THE IMMUNITY TOPIC- HIV ADJUSTED TO THE AQA SPECIFICATION AND MADE FROM MARKSCHEMES

Institution
Course

Content preview

The Human Immunodeficiency Virus
=

HIV

causes the disease acquired immune
deficiency syndrome ( AIDS ) .




AIDS is condition where the immune deteriorates and
eventually fails This makes someone with
system
a
-


.




AIDS more vulnerable to other infections , like pneumonia .




What are the host cells for HIV ?



HIV CD4X cells , cells that have specific CD4 their
targets meaning this molecule called
-


on


membrane I CD4 is used to help




:m→:tf
.




immune cells communicates CD4X cells
÷
→ ~
9 9 ,• dendritic
\
- -
, ?
a•
,• cells
-

,
. .




r -
O
B- too



ai /
I
B- hoo n


• ↳
• b.
%
• "




r

macrophage
HIV infects and
eventually kills helper T cells ( a CD4X cell )
-

-
.





The CD4 -1 cells ( Tn cells ) act as hosts cells
e.g
-




Remember helper ( via called
T send chemical signals molecules
cytokines) that activate
-


cells


phagocytes ( macrophages Ineutrophils ) ,
cytotoxic T-cells and B- cells .




How does HIV
develop AIDS ?



Without T-cells
enough helper (due
hijacking helper T-cells) the
system unable have
-



to HIV ,
immune is to

effective infections because don't behave how
an
response to other immune
system cells
they should .




People infected with HIV develop AIDS when the helper T their
body reach
-
-
cell numbers in a



low level
critically .




Structure of HIV

,*.. :* .




.io/gq
Bo
Of
mate attachment
genetic µ ,
protein
'
On the outside is a
lipid envelope ,
embedded in


g•





( RNA
) which are -
like attachment proteins
✓ peg
⑧⑧\ food Inside the
.




, envelope is a
protein layer called the


capsid that encloses two
single strands of RNA and




IE 3. cars .
÷:÷÷÷::÷÷:c:*:*:c:*:÷:
Bol n
hope DNA from RNA -
the reverse reaction to that


too carried
r
by transcriptase )
Boo
out
lipid envelope

& &
r
reverse
B
transcriptase
(enzyme )
matrix

Written for

Study Level
Examinator
Subject
Unit

Document information

Uploaded on
July 2, 2023
Number of pages
3
Written in
2022/2023
Type
SUMMARY

Subjects

$11.01
Get access to the full document:

Wrong document? Swap it for free Within 14 days of purchase and before downloading, you can choose a different document. You can simply spend the amount again.
Written by students who passed
Immediately available after payment
Read online or as PDF

Get to know the seller
Seller avatar
talhaahmed360

Also available in package deal

Get to know the seller

Seller avatar
talhaahmed360
Follow You need to be logged in order to follow users or courses
Sold
-
Member since
3 year
Number of followers
0
Documents
47
Last sold
-

0.0

0 reviews

5
0
4
0
3
0
2
0
1
0

Why students choose Stuvia

Created by fellow students, verified by reviews

Quality you can trust: written by students who passed their tests and reviewed by others who've used these notes.

Didn't get what you expected? Choose another document

No worries! You can instantly pick a different document that better fits what you're looking for.

Pay as you like, start learning right away

No subscription, no commitments. Pay the way you're used to via credit card and download your PDF document instantly.

Student with book image

“Bought, downloaded, and aced it. It really can be that simple.”

Alisha Student

Working on your references?

Create accurate citations in APA, MLA and Harvard with our free citation generator.

Working on your references?

Frequently asked questions