WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
5th Edition
ISBN: 9781319487317
Author: PHELAN
Publisher: INTER MAC
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Chapter 15, Problem 10MC
Summary Introduction

Introduction:

The word AIDS stands for Acquired Immunodeficiency Syndrome. It is a disease caused by Human Immunodeficiency Virus (HIV), a member of a group of viruses called retrovirus, which have an envelope enclosing the RNA genome.

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Which of the following virus does not use CXCR4 as a receptor? a. HIV-2 b. SIV c. poliovirus d. HIV-1
Identify the statement that does not provide accurate evidence as to why HIV is so lethal.   a. During the course of infection, HIV increases immune activation by altering intestinal physiology to let more microbes into the blood supply.   b. Immune evasion increases in many infections due to HIV virions evolving new and unrecognizable epitopes (antigens).   c. In many individuals the virus population evolves to use different receptors to gain access to a greater diversity of host immune cells.   d. HIV causes enhanced replication and proliferation of T cells, which allows the immune system to work better at defending against pathogens.
Read the article and then answers the following question.3. Why is it difficult to create a vaccine for AIDS? a. the virus is too well hidden in the body b. the virus is constantly changing c. vaccines only work on bacterial infections d. not enough research money 4. Years ago, doctors would prescribe antibiotics for many symptoms of a common cold. Today, it is much more difficult to get a prescription. Why has the medical industry changed its procedures? a. too many antibiotics can create resistant bacteria b. pharmaceutical companies objected to the amount of prescriptions c. antibiotics can make people sick d. doctors are against prescribing medicines 5. To see evolution in action, you should look at organisms with: a. short lifespans b. complex body systems c. large populations d. short amount of time between generations
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