DSM 19 group 3

Lymphoid stem cells develop into ________________.

B cells and T cells

Which of the following statements is false concerning T cells and B cells?

B cells differentiate into T cells and produce antibodies against foreign antigens.

Leucocytes or white blood cells fight infection. They have the ability to leave the bloodstream and enter a damaged or infected area. What is the name of this process of leaving the bloodstream?

Emigration or diapedesis

Which of the following types of white blood cells are involved in fighting off parasitic infections, such as flukes and roundworms?

Eosinophils

Which of the following is a notable feature of leukemia?

Excessive numbers of white blood cells

Which of the following is a substance released from basophils to prevent blood from clotting?

Heparin

Which type of granular leukocyte can engulf up to two dozen bacteria and also produces a respiratory burst that creates harsh chemical agents such as hydrogen peroxide?

Neutrophil

Which group of white blood cells are classified as granulocytes?

Neutrophils, eosinophils, and basophils

Because the concentration of dissolved gases differs between the plasma and the tissue fluid, __________.

O2 will tend to diffuse from the plasma to the interstitial fluid, and CO2 will tend to diffuse in the opposite direction

Megakaryocytes are specialized cells of the bone marrow that are responsible for __________.

formation of platelets

Myeloid stem cells develop into __________________.

megakaryocytes

Platelets are formed from large cells called __________.

megakaryocytes

Upon analyzing components of pus, one would typically find _________________.

neutrophils and cellular debris

An abnormally low platelet count is called __________.

thrombocytopenia

One of the major substances that stimulates platelet formation is ________.

thrombopoietin

What type of white blood cell would you find in the greatest numbers in an infected cut?

Neutrophil

A runny nose is one of the symptoms of allergy or a cold. Which cell is responsible for causing the runny nose?

Basophils

Which type of white blood cell includes the B and T cells, which are responsible for humoral and cell-mediated immunity?

Lymphocyte

Nonspecific defenses do not discriminate between one type of threat or another. The specific immune response will provide a counterattack against specific types of invading pathogens. What cell type is responsible for specific defense?

Lymphocytes

Which type of white blood cell circulates in the blood for about 24 hours before entering the tissues and differentiating into a macrophage?

Monocyte

Which blood cell is responsible for carrying out immune surveillance?

Natural killer cells

What does the term thrombocytopoiesis mean?

Platelet production

What is the term for the characteristic of white blood cells in which they are attracted to a specific chemical stimulus?

Positive chemotaxis

Which of the following is NOT a function of platelets?

They release chemicals to destroy bacteria.

How do basophils respond to an injury?

They release histamine and heparin.

The number of eosinophils increases dramatically during __________.

an allergic reaction or a parasitic infection