The majority of cervical cancers in the United States are caused by:

Gary, a 56-year-old man, is having his annual physical. During the patient history, he mentions that he has been feeling tired over the last few months, and suggests it might have something to do with the extra weight he's put on since his knee surgery last summer. He tells the doctor that he wakes up at least a few times every night, and that his wife has complained about his loud snoring. When the doctor examines his throat, she notices that his tonsils are enlarged. What condition is the likely cause of Gary's fatigue?

In iron-deficiency anemia:

To invade, malignant cells must be able to:

A low hematocrit or hemoglobin count indicates which condition?

The common name for cerebral vascular accident (CVA) is:

Which neurotransmitter is primarily associated with feelings of pleasure and reward in addiction?

When the weather turns cold, Oliver's fingers and toes frequently turn cold and blue. He's also noticed the same thing happens when he's feeling stressed. Which condition does Oliver most likely have?

Collateral blood vessel formation occurs with aging and recovery from:

Histamine causes vessels to: