Which is TRUE about olfactory receptors?
A. They can discriminate only four primary chemicals - sweet, sour, salty, and bitter.
B. When stimulated, their signaling pathway sends action potentials directly to the limbic system.
C. They are unable to detect odorants without activation of taste buds.
D. Only four different types of odorant receptor proteins are found in the plasma membrane of olfactory receptors.
E. They are found in the floor of the nasal cavity and on the upper surface of the hard palate, which separates the mouth from the nose.
B
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A. intramembranous B. interstitial C. osteomalacia D. appositional E. endochondral
A person who is hypothyroid would be expected to:
A. have an increased basal metabolic rate. B. have reduced tolerance for cold temperatures. C. lose body weight. D. be restless and irritable. E. have symptoms similar to over-activation of the sympathetic nervous system.
Nutrient-rich blood from the digestive tract comes to the liver by way of the
A. hepatic artery. B. hepatic portal vein. C. hepatic vein. D. inferior vena cava. E. celiac trunk.
Which layer undergoes mitosis? Contains melanocytes? Contains dendritic cells?
What will be an ideal response?