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A patient develops skin cancer on the head and neck following years of sunbathing. Which of the following cancers is most likely?

A 30-year-old male was involved in a motor vehicle accident. The glass from the shattered window cut his face and neck. The scar, however, was raised and extended beyond the original boundaries of the wound. This pattern of scarring is caused by impaired:

Which of the following can bind to plasma membrane receptors?

A group of prison inmates developed tuberculosis following exposure to an infected inmate. On examination, tissues were soft and granular (like clumped cheese). Which of the following is the most likely cause?

Hand washing must be performed only after each patient.

Which actions or supplies are included in standard precautions? Select all that apply.

A 22-year-old was recently diagnosed with acquired immunodeficiency syndrome (AIDS). Which decreased lab finding would be expected to accompany this virus?

When the immunologist says that pathogens possess infectivity, what is the immunologist explaining? Infectivity allows pathogens to:

How do potassium and sodium diffuse across plasma membranes?

Which of the following are blood-borne pathogens? Select all that apply.