Homeostasis and Feedback Mechanisms

Front

What is homeostasis?

Back

The process of adjusting internal body conditions within a narrow range to maintain optimal functioning.

Front

What structure is responsible for the movement of chromosomes during mitosis?

Back

Spindle.

Front

How many nucleotides make up a codon?

Back

3.

Front

In which phase of mitosis do two nuclei begin to form?

Back

Telophase.

Front

In which stage of mitosis do the chromosomes line up at the equator of the cell?

Back

Metaphase.

Front

What is the role of the spindle fibers in cell division?

Back

To attach to chromosomes and help separate them during mitosis.

Front

Define feedback mechanism in biological systems.

Back

A process that uses the conditions of one component to regulate the function of another component.

Front

What is negative feedback?

Back

A mechanism that counteracts a change in a physiological variable to maintain homeostasis.

Front

Give an example of a negative feedback loop in the human body.

Back

The regulation of body temperature: when body temperature rises, mechanisms are activated to cool the body down.

Front

What is positive feedback?

Back

A mechanism that amplifies a change in a physiological variable.