The human body is capable of defeating a wide range of viruses; however, HIV is universally fatal. What characteristic of HIV seems responsible for its lethal effect?

a) The virus directly attacks heart muscle.
b) It attacks the bones, leading to multiple fractures.
c) The virus attaches to neurons, reducing the ability to transmit signals.
d) Rapid mutation of HIV makes it difficult for the immune system to defeat its action.


D

Psychology

You might also like to view...

"I didn't know you knew how to do that!" says a bewildered parent to his young daughter. Apparently, the young girl would watch her dad turn on and play games on the computer. This imitation had been going on for several months, but this was the first time she demonstrated her learned behavior. Her father explained the delay by using the notion of:

A. cognitive learning B. observational learning C. learning-performance distinction D. operant conditioning

Psychology

Measures of social support all have in common the fact that they measure number of people in one's social network

Indicate whether the statement is true or false

Psychology

Under the theory the, law is a(n):

A. right. B. option. C. privilege. D. contract.

Psychology

The pea-sized structure hanging from the base of the brain that is important in regulating growth as well as lactation is the gland

a. pituitary b. pineal c. thyroid d. adrenal

Psychology