A person has an infection of the middle ear structure that equalizes external and internal pressure, which makes it difficult for the eardrum to vibrate with incoming sound. Which structure(s) should care address?
A. Ossicles
B. Eustachian tube
C. Semicircular canals
D. Tympanic membrane
Answer: B
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Which of the following types of proteins is present at the highest percentage in the blood component labeled I in the figure?
a) globulin b) albumin c) fibrinogen d) thrombin e) keratin
If this kind of section were made through the center of the head, both the right and left eyes would be on the same section.
a. coronal section b. midsagittal section c. transverse section d. both A and C above
Some birds have structures that act as a modified rumen because they contain bacteria that that detoxifies harmful alkaloids
Indicate whether the statement is true or false
In people who stand for long periods, blood tends to pool in the lower limbs and this may result in varicose veins. What causes the varicose veins?
A) An aneurysm or weak point in a vein B) An aneurysm or weak point in an artery C) Failure of the venous valves D) Failure of the lymphatic valves E) A ruptured aneurysm in a vein