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Homeostasis
Just homeostasis
| Question | Answer |
|---|---|
| What is Homeostasis? | It is the process of keeping our body's internal environment fairly constant. |
| What is set point? | Ideal value/level our body aims to maintain. (e.g.: body temperature at around 37 degrees) |
| What is dynamic equilibrium? | Process where your body is constantly adjusting to stay around the set point. (e.g.: sweating to cool down when it's too hot or shivering to warm up when it's cold) |
| What is tolerance? | how well an organism functions under different environmental conditions. |
| what is tolerance limit? | The range of conditions (such as body temperature, blood sugar level, pH, etc.) within which the body can function normally.(edges your body can't go past) |
| What if tolerance limits are surpassed? | If these conditions go beyond the tolerance limits, the body may not function properly, and health can be at risk |
| What is a feedback system? | A feedback system is a circular situation in which the body responds to change, and the response alters the initial stimulus. |
| Common feature of the feedback system? | 1. Stimulus 2. Receptor 3. Modulator 4. Effector 5. Response 6. feedback |
| Why is there a broken arrow pointed towards the stimulus after the feedback? | This shows that the initial stimulus has been successfully removed after the feedback. |
| What is the difference between negative and positive feedback? | In negative feedback the response has the effect of reducing or eliminating the initial stimulus that caused it. Whereas, in positive feedback the response to the stimulus reinforces and intensifies that stimulus. |
| Say one example of negative feedback using its common features. | sample: 1. Stimulus: increase in blood sugar 2. Receptor: Chemoreceptors in the beta cells of islets of Langerhans. 3. Modulator: Beta cells of islets of Langerhans produces insulin. 4.Effector: Adipose tissues, liver, skeletal muscles and somatic cel |
| continued answer of prev question. | 5. Response: Glycogenesis in liver and muscles, lipogenesis in liver/adipose tissue. Glycolysis in somatic cells. 6.Feedback: decreased blood glucose as glucose is converted into glycogen/fat and up taken by cells. |
| Say one example of positive feedback | Sample: childbirth 1. Head of the fetus against cervix. 2. Nerve impulses from cervix are transmitted to brain. 3. Brain stimulates pituitary gland to release oxytocin. 4.Oxytocin is carried from the blood stream to the uterus |
| continued answer of prev question | 5. Oxytocin stimulates uuteine contarctions |
| Types of receptors and their location. | 1. Thermoreceptors - peripheral(skin) and central(hypothalamus) 2. Osmoreceptors(hypothalamus) 3. Chemoreceptors - central(medulla) and peripheral (carotid and aortic bodies) |
| Continued | 4.touch receptors in skin (epidermis and dermis) 5. pain receptors all around the body except brain. baroreceptors in the carotid and aortic bodies |
Created by:
Dzummik
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