Hi, everybody. Our next question says which of the following statements describes hormones. A, a type of chemical substance that affects the functioning of specific organs and tissues in the body by binding to specific receptors. B A molecule that acts as a messenger between nerve cells. C A compound secreted by the body's exocrine glands or D A substance that facilitates enzyme activity in the body. Well, in this question, it almost might be easier to work by a process of elimination here because right off the bat, we can look at uh Choice B asking for a messenger between nerve cells and that would be neurotransmitters, not hormones. So we can eliminate choice B then we look at C A compound secreted by the body's exocrine glands. Those would just be exocrine secretions. Remember that exocrine glands secrete their products via ducts. And examples would be sweat, digestive enzymes and mucus but not hormones. Uh and they don't bind to receptors and they're not messengers either. And then d A substance that facilitates enzyme activity in the body. Um that would be a coenzyme or co factor, which would be a substance, usually a vitamin or a mineral that is necessary for an enzyme to carry out its function in case of specific enzymes. So, not choice d that leaves us with choice a a substance that affects the functioning of specific organs and tissues by binding to receptors. And that would be a good description of hormones. They are mess chemical messengers and bind to specific receptors to affect whatever um they're going to cause to happen. So in this case, sometimes it can be easier when the other answer choices are very specific and described on something that is definitely not your answer that can kind of help you feel confident in a sort of more generic sounding answer like choice. A so again, hormones are choice a a type of chemical substance that affects the functioning of specific organs and tissues in the body by binding to the specific receptors. See you in the next video.

Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart2h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m