An allergen is best described as a:
A) substance in the body that recognizes foreign materials.
B) chemical released by cells in the body to fight foreign materials.
C) chemical messenger in the body that activates the immune system when there is a foreign material present.
D) foreign substance that causes a hypersensitivity reaction in the body.
Question 2
Activase is used to:
a. break down thrombi.
b. dilate blood vessels to reduce blood pressure.
c. decrease the formation of platelet plugs.
d. interrupt the clotting cascade.
Body cavities. (A) Lateral view of a sagittal section through the body. (B) Anterior view of a front
Overview of body defenses.
Various types of cells within the human body.
A utility knife uses replaceable blades and can cut carpet and other materials.
Generating Energy from Glucose When your body needs to break down glucose
A wide variety of pathogens may live on or in the human body.