Bio I -Unit 2 Test - Unit 2 Homeostasis and Feedback (2.1-2.3)

Front

What is homeostasis?

Back

Homeostasis is the maintenance of a relatively stable internal environment in an organism, often incorporating feedback regulation.

Front

What is a negative feedback loop?

Back

A negative feedback loop is a process that counteracts a change in a system, helping to maintain stability. For example, blood glucose regulation.

Front

What is a positive feedback loop?

Back

A positive feedback loop is a process that amplifies a change in a system, leading to an even greater change. An example is the process of childbirth.

Front

What role do ribosomes play in a cell?

Back

Ribosomes are essential for protein synthesis, allowing cells to produce proteins necessary for life functions.

Front

How does the body regulate temperature?

Back

The body regulates temperature through negative feedback mechanisms, such as sweating to cool down or shivering to generate heat.

Front

What happens when blood glucose levels rise?

Back

When blood glucose levels rise, the brain signals the pancreas to release insulin, which helps lower blood sugar levels by allowing glucose to enter cells.

Front

What is the significance of feedback regulation in homeostasis?

Back

Feedback regulation is crucial in homeostasis as it helps maintain stable internal conditions despite external changes.

Front

Can you give an example of a negative feedback loop in the human body?

Back

An example of a negative feedback loop is the regulation of body temperature, where mechanisms are activated to return the body to its set point.

Front

What is the difference between internal and external environments in homeostasis?

Back

The internal environment refers to conditions within the body, while the external environment refers to conditions outside the body.

Front

Why is maintaining homeostasis important for organisms?

Back

Maintaining homeostasis is vital for organisms to function properly, as it ensures optimal conditions for cellular processes.