Special lymphatic vessels, called lacteals, absorb dietary ________ that are not absorbed by the blood capillaries
A) vitamins
B) lipids
C) glucose
D) amino acids
E) water
B
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Identify the structure that is a thin semi-transparent partition between the external auditory canal and the middle ear?
a) K b) G c) J d) F e) E
Which of the following statements is most correct regarding the intracellular chemical signals known as "second messengers"?
A) Second messengers usually inactivate protein kinase enzymes. B) Second messengers usually act to remove nitric oxide (NO) from the cell. C) Cyclic AMP and calcium may be second messengers. D) Second messengers act through receptors called K-proteins.
________ is an autoimmune condition that leads to the degeneration of myelin sheaths in the CNS.
Fill in the blank(s) with the appropriate word(s).
Which of these is a lipid-soluble messenger?
A. thyroid hormone B. protein kinase C. glucose D. sodium E. cyclic AMP