The specificity of an antibody molecule depends on the structure of which of the following?
A) the constant segments of the light and heavy chains
B) the constant and variable segments of the light and heavy chains
C) the variable segments of the light and heavy chains
D) the variable segments of the light chains only
E) the constant segments of the heavy chains only
C) the variable segments of the light and heavy chains
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Leukopenia is a disorder resulting from conditions like HIV and aplastic anemia that causes levels of white blood cells to drop below the normal standard. Which of the following white blood cell counts suggests leukopenia?
A. 3,000 WBCs per microliter of blood B. 10,000 WBCs per microliter of blood C. 5,000 WBCs per microliter of blood D. 3,900 WBCs per microliter of blood
Exercise results in skeletal muscles compressing veins which encourages blood to return to the heart. In this scenario, which of the following is correct?
A) preload increases B) venous return decreases C) stroke volume decreases D) end diastolic volume (EDV) decreases
The endothelium of the blood vessels and its adjacent connective tissue make up the ________, which is surrounded by layers of smooth muscle and connective tissue called ________.
Fill in the blank(s) with the appropriate word(s).
The ventral root of a spinal nerve contains
A) cell bodies of motor neurons. B) interneurons. C) axons of motor neurons. D) ventral rami. E) axons of sensory neurons.