Chapter 17 - HW Adaptive Immunity https://quizlet.com/_3gddnr

Due to its more numerous binding sites compared to other classes of immunoglobulins, IgM is more effective regarding which mechanism of action, as a result of an antigen-antibody reaction?

Agglutination

Which of the following statements does not accurately describe cells involved with cellular immunity?

Cellular immunity involves cells that recognize antigens and make specific antibodies against them.

Which type of cell directly attacks infected cells?

Cytotoxic T-cells

HIV directly infects T-cells. Why is this problematic for cell-mediated immunity?

Cytotoxic T-cells begin to attack the virally infected T-cells, reducing the number of T-cells in the body.

According to the animation, on what day does IgM first appear?

Day five

According to the animation, on which day does the production of IgG occur in the secondary response?

Day five

What makes agglutination by antibodies possible?

Each antibody has at least two antigen-binding sites.

Immune cells that secrete cytokines and activate other immune cells are:

Helper T-cells

How do helper T-cells and cytotoxic T-cells work together

Helper T-cells produce cytokines to activate other cells of the immune system.

Antibodies are a part of which type of immunity?

Humoral

Which part of the adaptive immune response involves B cells?

Humoral

In the antigenic immune response, the antibodies produced in response to the second exposure to an antigen are mostly ______.

IgG

Which immunoglobulin class, found in blood, lymph, and the intestine, enhances phagocytosis, neutralizes toxins and viruses, and protects the fetus and the newborn?

IgG

If a patient has been exposed to an antigen for the first time, which class of immunoglobulins appears first?

IgM

Which cells are involved in a secondary response?

Memory B cells and plasma cells

Which type of adaptive immunity is involved when an unvaccinated individual is exposed to antigens but shows no signs or symptoms of illness? Which type of adaptive immunity is involved when an unvaccinated individual is exposed to antigens but shows no signs or symptoms of illness?

Naturally acquired active immunity

What is the role of plasma cells in humoral immunity?

Plasma cells produce antibodies.

According to the animation, for approximately how many days is IgG present in the serum?

Ten days

Which of the following most accurately describes how a pathogenic bacterium might be affected by antibodies?

The antibodies may block proteins necessary for binding the pathogen to the host, may opsonize the bacterium, or may agglutinate bacteria.

How is the secondary response different from the primary response in terms of antibody concentration in the blood?

The secondary response is faster and produces more antibodies than the primary response.

The primary immune response involves

a slow rise in the concentration of antibodies, followed by a gradual decline.

An anamnestic response is

another name for secondary response.