Unit 3: Lecture HW Questions

Which of the following is NOT a function of T-cells? A. Produce antibodies after initial exposure to an antigen B. Secrete cytokines C. Increase the activity of other immune cells through the release of chemical messengers D. Locate and destroy infected cells E. Inhibit the activity of other T-cells

A. Produce antibodies after initial exposure to an antigen

Which of the following is a primary lymphatic organ? A. Thymus B. Peyer's Patches C. Tonsils D. Spleen E. Lymph nodes

A. Thymus

Which of the following is NOT considered a central location of lymph nodes? A. Tibial B. Axillary C. Inguinal D. Cervical

A. Tibial

Lymph vessels are most similar to: A. None of the answer choices are correct B. Arterioles because they are capacitance vessels C. Veins because they return fluid back to the heart D. Capillaries because they are leaky. E. Arteries because they have high pressure

C. Veins because they return fluid back to the heart *Fluid that is forced out of the arterial end of the capillary but is NOT reabsorbed in the venous end of the capillary will most likely be returned to the bloodstream by VESSEL

During an inflammatory response, neutrophils exit the bloodstream via a process called ______________are attracted to an inflamed site by cytokines via a process called __________.

Diapedesis, Chemotaxis

The lymph nodes function to: A. Prevent microorganisms and debris from getting into the bloodstream B. Destroy and remove microorganisms C. House immune cells D. Filter lymph E. All of the answer choices are correct

E. All of the answer choices are correct

Which of the following cell types of the innate immune system does NOT perform phagocytosis? A. Mast Cells B. Neutrophils C. Macrophages D. Dendritic cells E. Eosinophils

E. Eosinophils

The inflammatory response includes all of the following EXCEPT: A. Edema (swelling) B. Vasodilation C. Leukopoiesis D. Increased capillary permeability at the injury site E. Hemoglobin

E. Hemoglobin

Cell-mediated immunity is accomplished by the use of antibodies.

False

Natural Killer (NK) cells are an example of a type of B-cell.

False

Inflammation can be:

Good because it brings more blood and immune cells to the area to fight infection/injury

What leads to the redness associated with inflammation?

Hyperemia (increased blood flow) or vasodilation of blood vessels

Based on the characteristics and functions given, what respiratory organ is being described: found in the conducting zone directly between the pharynx and trachea.

Larynx

Which MHC class type is found on every nucleated cell in the body and why?

MHC I, to present self peptides and peptides from a pathogen

Which of the following types of cells would be present first, and in the largest numbers at the site of a very recent infection?

Neutrophils

Enhanced phagocytosis by "tagging" a cell by the binding of a specific protein is called ________ .

Opsonization

The detergent-like substance that keeps the alveoli from collapsing between breaths by reducing surface tension is also called:

Surfactant

Blood work shows that a patient has immature T cells in his blood and he lacks mature T cells. In which organ or tissue do you expect to see a problem?

Thymus

Removal of the ________ would be very harmful to a 1-year-old child but less so to an adult.

Thymus

Specificity and memory distinguish adaptive immunity from innate immunity.

True