Name four viral diseases and identify and briefly describe six common viruses
The common cold, the flu, herpes, hepatitis, and AIDS are viral diseases.
The most common viruses are:
• Rhinoviruses and adenoviruses, which get into the mucous membranes and cause upper respiratory tract infections and colds.
• Coronaviruses, named for their corona, or halo-like appearance, are second only to rhinoviruses in causing the common cold and other respiratory infections. A coronavirus is the cause of severe acute respiratory syndrome (SARS).
• Influenza viruses, which can change their outer protein coats so dramatically that individuals resistant to one strain cannot fight off a new one.
• Herpes viruses, which take up permanent residence in the cells and periodically flare up.
• Papillomaviruses, which cause few symptoms in women and almost none in men but may be responsible, at least in part, for a rise in the incidence of cervical cancer among younger women.
• Hepatitis viruses, which cause several forms of liver infection, ranging from mild to life-threatening.
• Slow viruses, which give no early indication of their presence but can produce fatal illnesses within a few years.
• Retroviruses, which are named for their backward (retro) sequence of genetic replication compared to other viruses. One retrovirus, human immunodeficiency virus (HIV), causes acquired immune deficiency syndrome (AIDS).
• Filoviruses, which resemble threads and are extremely lethal.
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Which of the following body fluids cannot transmit HIV?
A. breast milk B. semen C. blood D. vaginal secretions E. all of the above can transmit HIV
Hardening of the arteries of the brain is known as cerebral embolism
Indicate whether the statement is true or false
The property of obstructing the passage of radiant energy is:
A) radiopaque. B) radioactive. C) radiolucent. D) radionuclide.
An x-ray record of blood vessels is called:
A) thermogram. B) mammogram. C) angiocardiogram. D) sonogram.