The body is protected from invading bacteria, viruses, and ...

[eruditmonkey@yahoo.com]

The body is protected from invading bacteria, viruses, and carcinogens by the specific and nonspecific immune systems. Describe both types of immune systems.
 
  What will be an ideal response?

Question 2

Which of the following is true?
 
  a. Most mental disorders are caused only by psychological factors.
  b. Most mental disorders have a simple biological explanation.
  c. Most mental disorders are caused by neurological damage.
  d. Most mental disorders are not caused by neurological damage.

[T4T]

Answer to Question 1

Specific immune system responses protect us against specific infections and diseases, such as chicken pox and tuberculosis. These responses can be the result of natural or artificial processes. Natural immunities are acquired through breast milk or as a result of having a particular disease. Artificially produced immunities are acquired through vaccinations or inoculations.
Nonspecific immune system responses offer general protection against infections and diseases in four ways. First, anatomical barriers, such as the skin and the mucous membranes in the nose and mouth, prevent microbes from getting into the body. Second, a process called phagocytosis leads to the production of more white blood cells, which destroy invaders. Certain white blood cells called T-lymphocytes (T-cells) are particularly important because they secrete chemicals that attack and kill invading microbes. Third, other white blood cells known as B-lymphocytes secrete antibodies or toxins into the blood to kill invading bacteria and viruses. Last, inflammation at the site of an infection, which produces swelling and increased blood flow, allows more white blood cells to move in and attack pathogens.

Answer to Question 2

Many thanks to you.