What are the most common receptors for hydrophilic intercellular messenger molecules?
A. peripheral membrane proteins
B. integral membrane proteins
C. specialized phospholipids within the membrane
D. nucleic acids
E. intracellular proteins
B
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As they extend from the retina to the brain, the nerve fibers
A) from the nasal half of each retina cross over. B) all cross over. C) do not cross over. D) from the temporal half of each retina cross over.
Which lipoprotein transports cholesterol and other lipids to body cells?
A) high-density lipoprotein or HDL B) low-density lipoprotein or LDL C) vitamin D D) cortisol
The higher the relative humidity
a) The higher the rate of radiation b) The lower the rate of conduction c) The higher the rate of convection d) The lower the rate of thermoregulation e) The lower the rate of evaporation
The ____ gland is a pinecone-shaped gland that secretes melatonin
a. pituitary b. parathyroid c. thyroid d. pineal