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

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

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

In a metabolic pathway, the same enzyme ordinarily catalyzes several different reactions

Indicate whether the statement is true or false.

Anatomy & Physiology