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 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?
Which hormone is released when blood glucose levels are high? (1) Glucagon, (2) Insulin, (3) Adrenaline, (4) Cortisol.
Which of the following best describes negative feedback? (1) It amplifies changes in the system, (2) It counteracts changes to maintain stability, (3) It has no effect on the system, (4) It only occurs in plants.
Which of the following best illustrates a negative feedback loop? (1) Uterine contractions during labor, (2) Regulation of blood pH, (3) Milk production during breastfeeding, (4) Platelet aggregation in clotting.
Which of the following is a correct sequence of events in a feedback loop? (1) Effector → Receptor → Control center, (2) Receptor → Control center → Effector, (3) Control center → Effector → Receptor, (4) Effector → Control center → Receptor.
Fill in the blank: In a feedback loop, the __________ receives and processes information from the receptor.
Fill in the blank: In feedback regulation, the __________ is the variable that is being regulated.
Fill in the blank: In feedback regulation, the component that detects changes in the environment is called the __________.
Fill in the blank: The __________ feedback mechanism is responsible for amplifying the initial stimulus.
True or False: Feedback regulation can involve both the nervous and endocrine systems.
True or False: Feedback regulation can occur at the genetic level, such as in the lac operon of bacteria.
True or False: Feedback regulation is essential for the survival of multicellular organisms.
True or False: Feedback regulation is only found in animals, not in plants.
