In brown adipose tissue, norepinephrine stimulates ________.
A. beta1-adrenergic receptors
B. beta2-adrenergic receptors
C. beta3-adrenergic receptors
D. All of the choices are correct.
Answer: C
You might also like to view...
Muscles that attach to bone at one end and skin at another include which of the following?
A. The sphincters B. The piloerector muscles C. The multifidus muscles D. The muscles of facial expression E. The lumbricals
If a diver goes from a full layout position to a tuck position, what will happen to her angular velocity?
A. increase B. decrease C. remain the same D. need more information
Instead of a suture ligature, the veterinarian used _______________________ to ligate the vessel
Fill in the blank(s) with correct word
With regard to the action of hormones and neurotransmitters on cellular receptors, which of these describes "amplification"?
A. When the extracellular concentration of a chemical messenger reaches a very high level, it overwhelms transporter molecules and the chemical floods into the cell. B. Only hydrophilic first-messenger molecules can activate second-messenger molecules within the cell cytosol. C. A single first-messenger molecule activates multiple second-messenger molecules, each of which activate thousands of enzymes. D. Some cellular receptors have such low affinity for chemical ligands that it can require a million or more molecules to activate them.