Homeostasis & Negative Feedback Mechanism

Front

What is homeostasis?

Back

Homeostasis is the process of maintaining stable internal conditions within the body despite external changes.

Front

What is a feedback mechanism?

Back

A feedback mechanism is a biological process that uses the conditions of one component to regulate the function of another component.

Front

What is negative feedback?

Back

Negative feedback is a control mechanism that counteracts a change in a physiological variable, helping to maintain homeostasis.

Front

What role do receptors play in homeostasis?

Back

Receptors detect changes in the environment (stimuli) and send signals to the control center.

Front

What is the function of the control center in a feedback system?

Back

The control center processes information from receptors and determines the appropriate response to maintain homeostasis.

Front

What are effectors in the context of homeostasis?

Back

Effectors are organs or cells that carry out the response determined by the control center to restore balance.

Front

What happens to glucagon levels when you skip a meal?

Back

Glucagon levels rise, leading to the conversion of glycogen into glucose to increase blood sugar levels.

Front

What is glycogenolysis?

Back

Glycogenolysis is the process of breaking down glycogen into glucose, which occurs during low blood sugar levels.

Front

Which hormone is secreted by the beta cells of the Islet of Langerhans?

Back

Insulin is secreted by the beta cells of the Islet of Langerhans.

Front

What is the effect of insulin on blood glucose levels?

Back

Insulin lowers blood glucose levels by promoting the uptake of glucose by cells and stimulating glycogenesis.