Unit Three Review

Front

What is a positive feedback loop?

Back

A positive feedback loop is a process in which the effects of a small disturbance amplify the disturbance, leading to an increase in the output or effect.

Front

What are the main organs of the circulatory system?

Back

The main organs of the circulatory system are the heart and blood vessels.

Front

What do prokaryotes lack that eukaryotes have?

Back

Prokaryotes do not have membrane-bound organelles.

Front

What is the difference between prokaryotic and eukaryotic cells?

Back

Prokaryotic cells lack membrane-bound organelles, while eukaryotic cells contain membrane-bound organelles.

Front

What is a eukaryote?

Back

A eukaryote is an organism whose cells contain a nucleus and other organelles enclosed within membranes.

Front

Define membrane-bound organelles.

Back

Membrane-bound organelles are specialized structures within a cell that are enclosed by membranes, such as the nucleus, mitochondria, and endoplasmic reticulum.

Front

What is the function of the heart in the circulatory system?

Back

The heart pumps blood throughout the body, supplying oxygen and nutrients while removing waste products.

Front

What is the role of blood vessels?

Back

Blood vessels transport blood throughout the body, including arteries, veins, and capillaries.

Front

What is the significance of DNA in prokaryotic cells?

Back

DNA in prokaryotic cells is not enclosed in a nucleus; it is typically found in a single circular chromosome.

Front

What are the characteristics of prokaryotic cells?

Back

Prokaryotic cells are generally smaller, simpler, and lack membrane-bound organelles.