Order Autoimmune Disorder Discussion Essay

Order Autoimmune Disorder Discussion Essay
Order Autoimmune Disorder Discussion Essay
1. A genetic blood disorder in which regularly shaped biconcave erythrocytes
fold under conditions of low blood oxygenation is
(A) sickle cell anemia.
(B) pernicious anemia.
(C) spherocytosis.
(D) hemophilia.
(E) leukemia.
362. Of the following, which is NOT an autoimmune disorder?
(A) Type I diabetes
(B) Rheumatoid arthritis
(C) Hemolytic anemia
(D) Pernicious anemia
(E) Type II diabetes
363. Which chemical would interfere with the purpose of platelets?
(A) SRS-A
(B) Histamine
(C) Heparin
(D) Plasminogen
(E) Serotonin
364. Hematopoiesis is a process that occurs in
(A) the spleen.
(B) the thymus.
(C) lymph nodes.
(D) bone marrow.
(E) areas of infection.
Order Autoimmune Disorder Discussion Essay
365. The specificity of an antibody is determined by
(A) random gene rearrangements within B-cell progenitors.
(B) antigenic selection of B-cell clones within the bone marrow.
(C) clonal selection by macrophages within the bone marrow.
(D) B-cell response within lymph nodes.
(E) B-cell encounters with foreign antigens.
366. The lymph system connects to the circulatory system
(A) within the spleen.
(B) in lymph nodes.
(C) at the vena cava.
(D) at the capillaries in various somatic tissues.
(E) within the lungs.
88 › McGraw-Hill Education 500 MCAT: Biology
367. Which of the following is NOT considered part of the cardiac conduction
system?
(A) SA node
(B) M cells
(C) Purkinje fibers
(D) AV bundle
(E) AV node
368. Oxygen and nutrients reach the myocardium
(A) by diffusion through the endocardium.
(B) through two coronary arteries.
(C) by diffusion through the pericardium.
(D) from the pericardial cavity.
(E) through vessels connected to the vena cava.
Order Autoimmune Disorder Discussion Essay
369. Which of the following antibody classes provides the best protection
against microbial invasion through the intestinal mucosa?
(A) IgM
(B) IgD
(C) IgG
(D) IgE
(E) IgA
370. Which of the following is NOT considered a risk factor for hypertension?
(A) Obesity
(B) Smoking
(C) Advanced age
(D) Elevated HDL levels
(E) Elevated sodium levels
371. Which of the following least distinguishes the primary immune response
from the secondary immune response?
(A) A difference in time when a maximum response is presented
(B) Which antibody class is predominant
(C) Which antigen is used to stimulate the responses
(D) The level of the antibody response
(E) The role of memory cells in generating the response
Internal Movement and Defense ‹ 89
372. A differential stain is run by diagnosticians to count the various leukocytes
within the blood. Which of the following should always be at the highest
level in a healthy person?
(A) Monocytes
(B) Lymphocytes
(C) Eosinophils
(D) Basophils
(E) Neutrophils
373. Which is the proper sequence of events that produces a blood clot?
(A) Calcium binds prothrombin activator → prothrombin activator produces thrombin → thrombin produces fibrin → fibrin produces clot.
(B) Prothrombin activator produces thrombin → calcium binds prothrombin activator → thrombin produces fibrin → fibrin produces
clot.
(C) Thrombin produces fibrin → fibrin produces prothrombin activator
→ prothrombin activator produces clot.
(D) Fibrin produces thrombin → thrombin produces prothrombin
→ prothrombin produces prothrombin activator → prothrombin
activator plus calcium produces clot.
(E) Thrombin produces fibrin → fibrin produces prothrombin
→ prothrombin produces prothrombin activator → prothrombin
activator plus calcium produces clot.
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