Lymphocytes that destroy foreign cells or virus-infected cells are ________ cells
A) plasma
B) B
C) helper T
D) cytotoxic T
E) suppressor T
D
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The Y chromosome codes for a protein called ________, which initiates development of male anatomy.
A. GDX (gender-determining region of the X) B. MIF (mullerian-inhibiting factor) C. TDF (testis-determining factor) D. SRY (sex-determining region of the Y)
A large diameter is typical of which type of skeletal muscle fibers?
A. Type I B. Type II
Occlusion in the pulmonary arterial tree could lead to ___.
a) right ventricular hypertrophy b) myocardial infarction c) cardiac arrhythmias d) left ventricular hypertrophy
What is the purpose of a differential white blood cell count?
A) Determine the percentage of red blood cells in a blood sample B) Determine the percentage of thrombocytes in a blood sample C) Determine the percentage of each leukocyte in a sample of blood D) Determine the ratio of white to red blood cells in a blood sample