Question

Fevers can be uncomfortable, but the upside is that they are evidence of the body's attempt to heal. When a person develops an infection, a section of the brain called the hypothalamus recognizes a threat. The hypothalamus responds by increasing the body's temperature. Since both viruses and bacteria are temperature sensitive, this environment helps prevent them from multiplying. In addition, scientists have found evidence that fevers may increase the number of certain lymphocytes—white blood cells that are part of the immune system. Increased lymphocytes make the body more effective in destroying infected cells. Of course, this doesn't mean that high fevers don't warrant medical treatment. In fact, another reason that fevers are beneficial is that they serve as warning signs, indicating that something is amiss.Choose the correct one

1. Fevers are useful because they help the body fight infections.

2. Fevers are useful because they increase the body's lymphocytes.

3. The hypothalamus responds to infections by raising the body's temperature.

Answer 1

All three statements are correct.

- (1) The passage says higher temperature helps prevent viruses and bacteria from multiplying, so fevers help fight infections.
- (2) It also states fevers may increase certain lymphocytes, aiding immune response.
- (3) And it explicitly describes the hypothalamus raising body temperature in response to infection.