Mucus is moved along the lining of the trachea by extensions from cell membranes known as
A. flagella.
B. microvilli.
C. cilia.
D. stereovilli.
Answer: C
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The medullary inspiratory neurons receive inhibitory neural input from the pons and also from pulmonary stretch receptors.
Answer the following statement true (T) or false (F)
When patients who are receiving glucocorticoid therapy (for example, with prednisone need to stop taking it, the doctor will prescribe a series of doses of tapering size to gradually lower the dose rather than suddenly stop it. Explain this dosage strategy in terms of the negative feedback control of cortisol secretion
Which of the following is NOT a formed element found in blood?
A. Plasma B. Leukocytes C. Thrombocytes D. Erythrocytes
Which of the following is the second step in the process of fertilization?
A. The sperm nucleus enters the egg, and the egg immediately prevents any further sperm from gaining access by forming a fertilization membrane that a sperm cannot penetrate. B. A sperm fuses with the egg's plasma membrane. C. The capacitated sperm release their acrosomal enzymes to penetrate through the cells surrounding the egg. D. The nuclei of the sperm and egg rupture within the fertilized egg and the chromosomes mix to form a single nucleus.