The orbicularis oris muscle
A. puckers the mouth for kissing.
B. contributes to pouting.
C. contributes to laughing and smiling.
D. causes crow's feet wrinkles.
E. raises the eyelid.
A
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Which of the following is not true regarding RNA?
A. It has cytosine as one of its four nitrogenous bases. B. It includes ribose, a 5-carbon sugar. C. It is double-stranded. D. It is transcribed in the nucleus and enters the cytoplasm.
Match the following:
A) IgE B) IgG C) IgA D) IgD E) IgM 1) Main antibody of both primary and secondary immune response. 2) Protects mucosal barriers. 3) Involved in allergies. 4) Along with IgM, this is a B cell receptor. 5) Activates complement.
When dissecting the sheep heart, it can be seen that the wall thickness of the pulmonary trunk and aorta is much greater than that of the superior and inferior venae cavae.
Answer the following statement true (T) or false (F)
A white blood cell engulfing a bacterium is an example of
A. active transport. B. pinocytosis. C. exocytosis. D. phagocytosis.