Feedback Regulation in Biological Systems
Biology ⇒ Biological Systems and Homeostasis
Feedback Regulation in Biological Systems starts at 9 and continues till grade 12.
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A patient has low blood calcium levels. The parathyroid gland releases parathyroid hormone, which increases blood calcium. When calcium levels return to normal, hormone release decreases. What type of feedback is this?
A person eats a meal high in sugar. Blood glucose rises, stimulating insulin release, which lowers blood glucose. What is the stimulus in this feedback loop?
A person is exposed to cold temperatures. The body responds by shivering to generate heat. What type of feedback is this?
A person is running and their body temperature rises. The body responds by increasing sweat production and dilating blood vessels. What is the effector in this feedback loop?
A person’s blood pressure increases. Baroreceptors in the arteries detect this change and send signals to the brain, which then signals the heart to slow down. What type of feedback is this?
Describe how feedback regulation is involved in the regulation of thyroid hormones.
Describe how feedback regulation operates in the lac operon of E. coli.
Describe the difference between negative and positive feedback with an example for each.
Describe the role of effectors in a feedback loop.
Explain how the hypothalamus acts as a control center in thermoregulation.
Explain the role of feedback regulation in maintaining blood pH.
Explain why feedback regulation is important in enzyme-catalyzed metabolic pathways.
Explain why positive feedback is less common than negative feedback in biological systems.
In a negative feedback system, what happens when a variable deviates from its set point?
What is feedback regulation in biological systems?
