Thyroxine is a peptide hormone, but its mechanism is different from other peptide hormones. Which of the following statements is true concerning this difference?
A) It is very specific in the cell type it targets.
B) It is a stimulant of cellular metabolism and targets all cells.
C) It causes positive feedback.
D) It does not require a second messenger to cause a response.
D
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Which of the following does not drain into the hepatic portal vein?
What will be an ideal response?
Creatine phosphate
A) is produced by the process of anaerobic respiration B) is only formed during strenuous exercise C) can replace ATP in binding to myosin molecules during contraction D) acts as an energy reserve in muscle tissue E) cannot transfer its phosphate to ADP
Match the cell type with its function.A. Produce hormonesB. Produce mucusC. May protect intestinal epitheliumD. Synthesize bileE. Produce digestive enzymesEndocrine cells
Fill in the blank(s) with the appropriate word(s).
The fusiform shaped receptor that detects stretch of the dermis is called:
a. Merkle disc b. Pancinian corpuscle c. Ruffini corpuscle d. Golgi tendon organ