1. Enterochromaffin-like cells of the gastric mucosa can betriggered to release histamine. Histamine, in this case, causesnearby parietal cells of the stomach lining to produce hydrochloricacid. The effect of histamine on parietal cells would best bedescribed as a(n) ________.
| a. paracrine |
| b. autocrine |
| c. exocrine |
| d. second messenger |
2. Which of the following statements is true of amino acid-basedhormones?
| a. They are lipid soluble. |
| b. They are synthesized from cholesterol. |
| c. They require a receptor in the plasma membrane. |
| d. They cross the plasma membrane. |
3. Cyclic AMP (cAMP), diacylglycerol (DAG), inositoltriphosphate (IP3), and calcium ions can serve as secondmessengers.
4. Which of the following is NOT a component of the cyclic AMPsignaling mechanism?
| a. G protein |
| b. hormone receptor |
| c. effector enzyme |
| d. steroid |
5. The effect of a hormone on a target cell may be decreased bythe presence of ________.
| a. plasma membrane receptors |
| b. synergistic hormones |
| c. antagonistic hormones |
| d. permissive hormones |
6. Hormones that bind to plasma proteins ________.
| a. are usually water soluble |
| b. must also bind to plasma membrane receptors |
| c. are usually made of amino acids |
| d. are usually synthesized from cholesterol |
7. Which of the following is correctly matched?
| a. zona reticularis gonadocorticoids |
| b. zona glomerulosa epinephrine and norepinephrine |
| c. adrenal medulla glucocorticoids |
| d. zona fasciculata mineralocorticoids |
Please answer the questions with a, b, c or d as the answerswont really need explanations. Thanks
