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Endocrine System (Endocrine Glands and Major Hormones 2 (Ovaries
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Endocrine System
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Maintaining Homeostasis
Maintaining Nutrient Supply
- The digestive system makes nutrients available
- The cardiovascular system distributes nutrients throughout the body
- Hormones control the regulation of cellular uptake of glucose
Coping with Pathogens
- The skin, digestive system, and immune system are all involved in the bodies defense
Repairing Injuries
- Wounds result in bleeding, clotting begins soon after
- Damage to the body tissues triggers the inflammatory response and white blood cells move to the injury site
Regulating respiratory gases
- Oxygen must be delivered to all cells and CO2 must be removed
- Capacity for O2 transport depends on blood hemoglobin
- Cardiovascular and lymphatic systems circulate respiratory gases
- rate of breathing varies depending on oxygen demands
Maintaining Fluid and Ion Balance
- Fluid balance is maintained by the kidneys
- Osmoreceptors monitor blood volume and release regulatory hormones (ADH and aldosterone)
Feedback mechanisms
Postive Feedback
- Amplify a physiological response in order to achieve a particular result
- Ended when a natural resolution is reached
- Can be dangerous id left unchecked
Negative Feedback
- Acts to counteract any departures from a steady physiological state
- Corrective mechanism
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