Dendritic cells "teach" T-cells self tolerance through a negative selection mechanism.
a. true
b. false
Answer: a. true
Anatomy & Physiology
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Erythropoiesis is stimulated by a hormone that is secreted by which of the following?
A. The pituitary gland B. The bone marrow C. The kidneys D. The thymus E. The spleen
Anatomy & Physiology
A lymph node consists of
A) all of the above. B) lymph nodules. C) compartments that contain masses of lymphocytes and macrophages. D) afferent vessels circulating lymph into the node on its convex surface.
Anatomy & Physiology
The cylindrical shaped organelle with nine groups of microtubule triplets is called
A) microfilaments. B) cilia. C) microsomes. D) centrioles. E) thick filaments.
Anatomy & Physiology
In a metabolic pathway, the same enzyme ordinarily catalyzes several different reactions
Indicate whether the statement is true or false.
Anatomy & Physiology