Answer to Question 1
The Mycobacterium enters the victim by way of the respiratory tract and establishes itself in the lungs or almost any organ. Initial symptoms are mild. Then the TB enters a dormant stage, which may last for decades, being kept in check by the immune response. Up to decades later, TB may become active when the immune system fails due to an extended viral infection, increasing age, serious injury, or substance abuse. Once activated, TB establishes large colonies in the lungs and other organs and destroys functional tissue by the release of toxins, replacing the tissue with fibrous plaques called tubercles.
Answer to Question 2
FALSE
Explanation: Mature neutrophils are segmented neutrophils or segs. Bands or stabs are immature neutrophils.
Summary of events in the killing of virus-infected cells by cytotoxic T cells.
Photograph of a person with a cataract in the right eye.
Tuberculosis. Microphotograph of the Mycobacterium tuberculosis, the cause of the disease TB.
In the summer of 1793, a yellow fever epidemic struck Philadelphia, killing nearly 4,000. Tens of th
HIV cycle in an infected cell: (a) latent infection; (b) active infection.
Pelvis and knee rock. Hold the feet again for a moment, and move to the person’s right side. Place ...