In an adult, the interatrial septum bears a shallow opening that marks the site of the original foramen ovale, which is (the)
A) ductus arteriosus.
B) ductus venosus.
C) fossa ovalis.
D) ligamentum arteriosum.
E) None of the answers are correct.
C) fossa ovalis.
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Normal, resting exhalation/expiration of air from the lungs requires contraction of the exhalatory/expiratory intercostal muscles.
Answer the following statement true (T) or false (F)
The major stimulus for the secretion of HCl during the cephalic phase of gastric regulation is ________.
A. release of histamine by ECL cells B. vagal stimulation of chief cells C. the hypothalamus D. vagal stimulation of parietal cells
Where does saltatory conduction occur?
A. From node to node in unmyelinated fibers B. Down the entire length of a myelinated fiber C. Down the entire length of an unmyelinated fiber D. From node to node in myelinated fibers
What constitutes the upper airways?
A. the air passages prior to the trachea B. the air passages prior to the lungs C. the air passages from the nose and mouth through the conducting zone D. the air passages of the head and neck