What is the body's specific defense system against infection?
What will be an ideal response?
Answer: In this response, white blood cells called lymphocytes not only destroy a specific pathogen, but also produce numerous clones of memory cells that, on any subsequent encounter with that pathogen, will recognize and attack it almost instantly. The two types of lymphocytes involved in specific immunity are the B cells and the T cells.
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Trace the flow of air through the respiratory system as it is inhaled
What will be an ideal response?
One ounce or less of alcohol daily has been identified as a safe level of alcohol consumption during pregnancy.
Answer the following statement true (T) or false (F)
Which of the following statements is TRUE concerning coronary heart disease?
A) It can trigger sudden cardiac arrest. B) Is results from atherosclerosis of the arteries that feed the heart. C) It is the single leading cause of death in the United States. D) All of the answers are correct.
Feeling an increase in body temperature as you stand on black asphalt on a hot day is an example of
a. radiation c. convection b. conduction d. evaporation