All of the following statements concerning the esophagus are correct EXCEPT
(A) It extends from the pharynx to the stomach.
(B) It is crossed by the arch of the aorta.
(C) It is crossed by the right main bronchus.
(D) It passes through the esophageal hiatus.
(E) It normally has four constrictions.
Ans: (C) It is crossed by the right main bronchus.
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The vessel that receives blood from the head, neck, chest, shoulders, and arms is the
A) internal jugular vein. B) external jugular vein. C) superior vena cava. D) inferior vena cava. E) coronary sinus.
When two atoms with very different electronegativity share electrons a polar covalent bond is formed
Indicate whether this statement is true or false.
What is the function of the serous fluid?
A) increase friction B) reduce friction C) supplies nutrients to the organs D) absorb shock when the organs move
Match the hormone with the best description.A. Aids in spermatogenesisB. Inhibits FSH secretionC. Menstrual cycleD. Increases flexibility of connective tissueProgesterone
Fill in the blank(s) with the appropriate word(s).