An immunoglobulin is a(n)
A. antibody, which is a white blood cell.
B. antibody, which is a protein molecule.
C. lymphocyte, which is a white blood cell.
D. lymphocyte, which is a protein molecule.
E. antigen, which is a cell receptor.
B
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When blood volume becomes abnormally low,
a. sodium reabsorption decreases b. more dilute urine forms c. renin catalyzes the conversion of angiotensinogen to angiotensin I d. aldosterone is secreted by the kidney e. all of the above occur
There is continuous salivary secretion due to constant low-level stimulation by the parasympathetic nerve endings within the salivary glands
Indicate whether the statement is true or false
Which condition occurs when the vertebrae fail to develop a complete neural arch and part of the spinal cord is exposed?
A. Multiple sclerosis B. Spina bifida C. Anencephaly D. Spinal meningitis E. Microcephaly
Of the following muscles of the head, which one is on the nose?
A) orbicularis oris B) nasalis C) frontalis D) zygomasticus major