Which statement BEST describes common communicable diseases? A.
Most communicable diseases are either bacterial or viral and infect the respiratory tract.
B.
All communicable diseases are viruses that cause pneumonia.
C.
Most communicable disease are bacteria and viruses that infect the intestinal tract.
D.
All communicable diseases are bacteria that grow in the respiratory tract.

Astructural difference between the trachea and esophagus that prevents the trachea from collapsing is the presence of: a) smooth muscle b) skeletal muscle c) respiratory cilia d) rings of cartilage

Annie is experiencing migraine headaches, so she visits her primary care doctor and pays with the insurance provided by her employer. what type of healthcare organization is annie utilizing?

What is the main structural difference between enveloped and nonenveloped viruses? a) enveloped viruses have their genetic material enclosed by a layer made only of protein. b) nonenveloped viruses have only a phospholipid membrane, while enveloped viruses have two membranes, the other one being a protein capsid. c) enveloped viruses have a phospholipid membrane outside their capsid, whereas nonenveloped viruses do not have a phospholipid membrane. d) both types of viruses have a capsid and phospholipid membrane; but in the nonenveloped virus the genetic material is between these two membranes, while in the enveloped virus the genetic material is inside both membranes.