Table of contents

1. Introduction to Biology2h 42m
2. Chemistry3h 37m
3. Water1h 26m
4. Biomolecules2h 23m
5. Cell Components2h 26m
6. The Membrane2h 31m
7. Energy and Metabolism2h 0m
8. Respiration2h 40m
9. Photosynthesis2h 49m
10. Cell Signaling59m
11. Cell Division2h 47m
12. Meiosis2h 0m
13. Mendelian Genetics4h 44m
14. DNA Synthesis2h 27m
15. Gene Expression3h 6m
16. Regulation of Expression3h 31m
17. Viruses37m
- Viruses
  37m
18. Biotechnology2h 58m
19. Genomics17m
- Genomes
  17m
20. Development1h 5m
21. Evolution3h 1m
22. Evolution of Populations3h 53m
23. Speciation1h 37m
24. History of Life on Earth2h 6m
25. Phylogeny2h 31m
26. Prokaryotes4h 59m
27. Protists1h 12m
28. Plants1h 22m
29. Fungi36m
- Fungi
  19m
- Fungi Reproduction
  17m
30. Overview of Animals34m
- Overview of Animals
  34m
31. Invertebrates1h 2m
32. Vertebrates50m
33. Plant Anatomy1h 3m
34. Vascular Plant Transport1h 2m
- Water Potential
  1h 2m
35. Soil37m
- Soil and Nutrients
  20m
- Nitrogen Fixation
  16m
36. Plant Reproduction47m
- Flowers
  33m
- Seeds
  14m
37. Plant Sensation and Response1h 9m
38. Animal Form and Function1h 19m
39. Digestive System1h 10m
- Digestion
  1h 3m
- Blood Sugar Homeostasis
  7m
40. Circulatory System1h 49m
41. Immune System1h 12m
42. Osmoregulation and Excretion50m
- Osmoregulation and Excretion
  50m
43. Endocrine System1h 4m
- Endocrine System
  1h 4m
44. Animal Reproduction1h 2m
- Animal Reproduction
  1h 2m
45. Nervous System1h 55m
- Neurons and Action Potentials
  1h 8m
- Central and Peripheral Nervous System
  46m
46. Sensory Systems46m
- Sensory System
  46m
47. Muscle Systems23m
- Musculoskeletal System
  23m
48. Ecology3h 11m
49. Animal Behavior28m
- Animal Behavior
  28m
50. Population Ecology3h 41m
51. Community Ecology2h 46m
52. Ecosystems2h 36m
53. Conservation Biology24m
- Conservation Biology
  24m

43. Endocrine System

Endocrine System

General Biology

43. Endocrine System

Endocrine System

Previous problemNext problem

0:55 minutes

Problem 1

Textbook Question

Which of the following is not an accurate statement?
a. Hormones are chemical messengers that travel to target cells through the circulatory system.
b. Hormones often regulate homeostasis through antagonistic functions.
c. Hormones of the same chemical class usually have the same function.
d. Hormones are often regulated through feedback loops.

Verified step by step guidance

Identify the key characteristics of hormones: Hormones are chemical messengers that travel through the bloodstream to target cells, often regulating physiological processes.

Understand the concept of homeostasis: Hormones play a crucial role in maintaining homeostasis, often through antagonistic functions where two hormones have opposite effects to balance a physiological parameter.

Explore the concept of feedback loops: Hormones are typically regulated by feedback mechanisms, which can be either negative or positive, to maintain balance within the body.

Analyze the statement about chemical classes: Hormones of the same chemical class can have different functions, as their effects depend on the target cells and receptors they interact with.

Evaluate each statement: Compare each statement to the known characteristics of hormones to determine which one is inaccurate. Focus on the statement about chemical classes, as hormones of the same class do not necessarily have the same function.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above

Video duration:

55s

Play a video:

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Hormones as Chemical Messengers

Hormones are biochemical substances produced by glands in the endocrine system. They act as chemical messengers that travel through the bloodstream to target organs or cells, where they elicit specific physiological responses. This process is crucial for coordinating various bodily functions, including growth, metabolism, and reproduction.

Homeostasis and Antagonistic Functions

Homeostasis refers to the body's ability to maintain a stable internal environment despite external changes. Hormones often regulate homeostasis through antagonistic functions, where pairs of hormones have opposite effects. For example, insulin and glucagon work antagonistically to regulate blood sugar levels, ensuring they remain within a narrow range.

Hormone Feedback Loops

Feedback loops are mechanisms that regulate hormone levels in the body. Negative feedback loops are common, where an increase in hormone levels leads to actions that reduce its production, maintaining balance. For instance, the hypothalamus-pituitary-thyroid axis uses feedback loops to regulate thyroid hormone levels, ensuring metabolic processes function optimally.