The ________ is used by both the digestive and respiratory systems.
A. epipharynx
B. oropharynx
C. nasopharynx
D. larynx
Answer: B
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During the development of lymphocytes, some pre-T and pre-B cells survive and develop into cells capable of an immune response, this is referred to as ______ selection
However some cells are suppressed from responding to self antigens, this is referred to as ______ selection. A. negative; positive B. neutral; negative C. negative; neutral D. neutral; positive E. positive; negative
The lower part of the large intestine including the rectum receives blood from the
A) celiac trunk. B) inferior mesenteric artery. C) internal iliac artery. D) abdominal aorta. E) external iliac artery.
Depth of field is ________
A) greatest at high power and increases as magnification increases B) greatest at high power and decreases as magnification increases C) greatest at scanning power and decreases as magnification increases D) greatest at low power and increases as magnification increases
Which type of hair forms the beard on the faces of males?
A. Terminal B. Nonpigmented C. Vellus D. Lanugo E. Pilus