Antigen-presenting cells are ________, and they display antigens to both ________ and ________.
A. any anucleate cell; helper T-lymphocytes; cytotoxic T-lymphocytes
B. any blood cell; helper B-lymphocytes; cytotoxic B-lymphocytes
C. immune cells; helper T-lymphocytes; cytotoxic T-lymphocytes
D. immune cells; B-lymphocytes; T-lymphocytes
E. any nucleated cell; B-lymphocytes; T-lymphocytes
Answer: C
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Which of the following is not true of organelles?
A. They are only in cells of humans. B. They are composed of aggregates of large molecules. C. They are found in many types of cells. D. They carry on specific activities.
Factors affecting the release of oxygen from hemoglobin can be visualized by using a
A) spirograph. B) pulmonary volume chart. C) respiratory cycle chart. D) oxygen-hemoglobin saturation curve. E) blood gas analysis.
Major branches of the subclavian artery include the ________ artery(ies)
A) radial B) brachial C) internal thoracic D) digital E) phrenic
Which of the cells in the diagram can be subdivided into categories of small and large versions of this cell type?
a) A b) B c) C d) D e) E