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Understanding Body Homeostasis Mechanisms
Apr 29, 2025
Conditions Inside Our Body - Homeostasis
Overview
- The body's internal conditions must be carefully controlled to operate within a narrow range of temperature and pH.
- Two main systems involved in internal regulation:
- Hormonal System
- Nervous System
Differences Between Hormonal and Nervous Systems
| Aspect | Hormonal System | Nervous System |
|---|---|---|
| Type of Message | Chemical | Electrical |
| Carried By | Blood | Neurones |
| Speed of Transmission | Slow | Fast |
Hormones
- Chemical messengers produced in endocrine glands.
- Carried in blood to target organs.
- Example: Hormone involved in regulating blood glucose.
Regulating Blood Glucose
- Glucose is essential for cellular functions.
- Important to maintain constant glucose concentration in blood.
Role of Insulin
- Insulin: Hormone produced by the pancreas.
- Regulates glucose levels in blood.
Insulin Action Mechanism
| Situation | Effect on Pancreas | Effect on Liver | Effect on Blood Glucose Level |
|---|---|---|---|
| Low Glucose | Insulin not secreted | Does not convert glucose into glycogen | Blood glucose increases |
| High Glucose | Insulin secreted | Converts glucose into glycogen for storage | Blood glucose decreases |
- High Glucose:
- Pancreas produces insulin.
- Body cells absorb glucose.
- Blood glucose is reduced.
- Normal Levels:
- Insulin not produced by pancreas.
- Less glucose absorbed by cells.
- Blood glucose remains stable.