How can we help?

You can also find more resources in our Help Center.

Ch. 21

True/False Questions
STUDY
PLAY
False
Lymph originates in blood capillaries that pick up tissue fluid.
True
Red bone marrow is the point of origin of all immune cells of the lymphatic system.
True
Mucous membranes prevent most pathogens from entering the body because of the stickiness of the mucus and the presence of lysozymes.
False
Interferons are secreted in response to bacterial infections.
True
Pus is made of dead neutrophils, macrophages, and other tissue debris from damages tissue.
False
Pyrogens act by increasing the set point for body temperature in the thalamus.
False
The antigenicity of a molecule is due to specific regions of it called haptens.
True
Interleukins are chemical signals by which immune cells communicate with each other.
True
Helper T cells respond only to epitopes attached to MHC proteins.
True
Cytotoxic T cells respond only to antigens bound to MHC-I proteins.
False
Clonal selection of T cells happens in the thymus.
False
Naive T cells can synthesize antibodies
False
Humoral immunity takes care of intracellular viruses, whereas cellular immunity takes care of extracellular viruses.
False
Memory B cells are found circulating mainly in the lymph.
True
Some antibodies against foreign antigens can react to similar self-antigens causing an autoimmune disease.