What is the role of myoglobin in muscle contraction?
A. Creatine phosphate generator in muscle
B. ATP carrier in muscle
C. Blood carrier in muscle
D. Oxygen carrier in muscle
Answer: D
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Answer the following statements true (T) or false (F)
1. Nonsteroid hormone receptors are in the nucleus of the cell. 2. Nonsteroid hormones require a second messenger. 3. ATP is frequently a second messenger of protein hormones. 4. Steroid hormone receptors are in the cytoplasm of the cell. 5. Steroid hormones use nitrogen oxide as their second messenger.
Match each of the terms with its definition or description.
a. liver b. gallbladder c. mucosa layer d. mesentery e. muscularis layer f. serosa layer g. ascending colon h. salivary glands i. esophagus j. fundus k. pylorus l. duodenum m. ileum n. pancreas o. transverse colon p. peristalsis q. vermiform appendix r. villi s. descending colon t. jejunum 1. _____ Part of the digestive tract wall that generates peristalsis 2. _____ Gland that produces lipase and trypsin 3. _____ Part of the small intestine that connects to the stomach; where most of the chemical digestion takes place 4. _____ Submandibular, sublingual, and parotid are all this type of gland 5. _____ Structure that concentrates and stores bile 6. _____ Innermost layer of the wall of the digestive tract 7. _____ Part of the large intestine that is between the cecum and hepatic flexure 8. _____ An extension of the peritoneum 9. _____ Part of the small intestine that joins with the large intestine 10. _____ Part of the stomach that joins with the small intestine 11. _____ Tube that leads from the pharynx to the stomach 12. _____ Gland that produces bile 13. _____ Outermost layer of the wall of the digestive tract 14. _____ Part of the large intestine between the splenic and hepatic flexures 15. _____ Part of the stomach that is to the left and above where the esophagus opens into the stomach 16. _____ Tiny finger-like projections that help absorb food in the small intestine 17. _____ A worm-like tubular structure that is attached to the cecum of the large intestines 18. _____ Muscle contractions that propel food through the digestive tract 19. _____ Part of the small intestine into which food enters when it leaves the duodenum 20. _____ Part of the colon that lies between the splenic flexure and the sigmoid colon
Hemoglobin assists in the transport of
A. oxygen. B. carbon dioxide. C. hydrogen ions. D. hydrogen ions, carbon dioxide, and oxygen.
A reticulocyte is a cell formed during erythropoiesis that has lost its nucleus and all organelles except some ribosomes.
Answer the following statement true (T) or false (F)