Lymphatic capillaries are absent from:
A. the central nervous system.
B. bones.
C. teeth.
D. all of the above.
Answer: D. all of the above.
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The opposite of a decomposition reaction is a ________ reaction.
Fill in the blank(s) with the appropriate word(s).
Veins of the brain empty into
A) coronary sinuses. B) dural sinuses. C) the cerebral arterial circle. D) external jugular veins. E) vertebral veins.
Membrane proteins are found
a. as distinct layers with one layer facing the extracellular fluid and the other facing the intracellular fluid. b. both embedded in and associated with the lipid bilayer of the plasma membrane. c. associated with the lipid bilayer of the plasma membrane, but not actually embedded in it. d. only in the plasma membrane, and not in other cellular membranes. e. none of these.
Which of the following combining forms mean nail?
A. cyan/o B. melan/o C. onych/o D. cutane/o