Kuby Immunology Exam 1 Ch's 1-6 Questions with correct answers| Latest 2026/2027

Kuby Immunology Exam 1 Ch's 1-6 Questions with correct answers| Latest 2026/2027 Which is the best definition of "immunity"? a.The state of having been exposed to a pathogen repeatedly b.The state of being resistant to reinfection with a pathogen - Correct! c.When an individual has never been exposed to a pathogen d.When the immune system is activated e.When physical barriers are not enough to prevent infection Effectors of the humoral immune system are known as odies oglobulin ement d.B cells e.All of the above -Correct! Which of the following cell types are lymphocytes? Macrophages Mast cells Neutrophils Erythrocytes T cells -Correct! Which of the following is TRUE about antigens? They are always derived from pathogens. They are always proteins. Correct Answer -They are recognized by T cells or B cells. They must be microbial in origin. They usually cause cellular damage. Which of the following classes of cell surface receptors are directly encoded in the germline? TCR BCR Correct! PRR Antibodies All of the above What is the central mechanism for establishing self-tolerance? a. Self-reactive T cells and B cells are killed during development. -Correct! b. Individuals that have immune systems that respond to self-antigens do not survive to reproduce. c. Immune cells that react to self-antigens are turned off when they recognize self-tissues. d. Certain immune suppressive cytokines are maintained in tissues to dampen auto reactive immune responses. e. Peripheral tissues have mechanisms to kill T or B cells that respond to them. Which of the following BEST describes chemokines?