What is the most common type of neuron?
A. Multipolar
B. Bipolar
C. Unipolar
D. Anaxonic
E. Dendritic
A. Multipolar
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Once a helper T-lymphocyte recognizes an antigen, it begins the immune response by secreting chemical signals called
A. antibodies. B. immunoglobulins. C. memory B-lymphocytes. D. memory T-lymphocytes. E. cytokines.
Answer the following statements true (T) or false (F)
1. White blood cells are produced through the action of colony-stimulating factors. 2. Hemoglobin is made up of the protein heme and the red pigment globin. 3. Each heme contains an atom of iron and can transport one molecule of oxygen. 4. Each hemoglobin molecule can transport two molecules of oxygen. 5. Diapedesis is the process by which red blood cells move into tissue spaces from the interior of blood capillaries.
The hormone aldosterone functions to promote the
A. Reabsorption of sodium B. Secretion of sodium C. Reabsorption of potassium D. Secretion of calcium
Which of the following will decrease the affinity of hemoglobin for oxygen?
A. Decreased pH, increased temperature, or increased 2,3-DPG B. Increased pH, decreased temperature, or increased 2,3-DPG C. Increased pH, increased temperature, or decreased 2,3-DPG D. Decreased pH, decreased temperature, or decreased 2,3-DPG