Bio systems - pre test

How many chambers does the heart have?

• 1

• 2

• 3

• 4

Which of the following statements best describes arteries?  

• all arteries carry oxygenated blood towards the heart

• all arteries contain valves to prevent the back-flow of blood

• all arteries carry blood away from the heart  

• only large arteries are lined with endothelium

Which system helps to protect the body by destroying germs within the body?

• Immune 

• Cardiovascular

•   Stomach

• Small Intestines

Within an organism there is a hierarchy, from smallest to largest, as follows:

• system, organ, organism, tissue, cell       

• organism, system, organ, cell, tissue

• cell, tissue, organ, system, organism      

• tissue, cell, system, organism, organ 

To communicate between cells, many multicellular animals use

• nerve signals and respiratory gases

• bones and muscles

• respiratory gases and muscles

• nerve signals and hormones

Which of the following statements best describes homeostasis?

• Keeping the body in a fixed and unaltered state. 

• Constant change

• Maintaining a near-constant internal environment. 

• . Altering the external environment to accommodate the body's needs.

The variable that is changed by the experimenter is

• Independent Variable

• Controlled Variable

• Dependent Variable

• Constant Variable

The kidneys are part of which body system.

• Excretory

• Respiratory

• Endocrine

• Immune

Antibiotics are a class of drugs that

• Kill bacteria and viruses

• Kill bacteria only

• Kill bacteria and Fungi

• Kill viruses only

How did you feel taking this quiz?

• Too easy.

• I felt confident on some answers, not all.

• So lost, I have no idea what any of this means.