Life Processes

What three systems work together to make an animal move about?

• nervous system, digestive system, muscular system

• nervous system, skeletal system, muscular system

• nervous system, circulatory system, muscular system

• nervous system, digestive system, circulatory system

What are the two gases that animals exchange with their surrounding?

• oxygen and nitrogent

• hydrogen and carbon dioxide

• nitrogen and helium

• carbon dioxide and oxygen

Tiny, thin-walled blood vessels where the blood and body cells exchange substances are called

• atria/

• capillaries.

• ventrilces.

• single loops.

One of the following is not an enzyme of digestive system.

• PEPSIN
• LIPASE
• TRYPSIN
• ENTEROGASTRONE

The main nitrogen-containing waste excreted in urine by humans is

• AMMONIA
• UREA
• URIC ACID
• NUCLEOTIDE

The process in which nutrients are broken apart, releasing the chemical energy stored in them. 

• cell respiration 
• excretion 
• circulation 
• synthesis 

The process that breaks down large food molecules into simpler molecules that the organism can use 

• digestion 
• synthesis
• metabolism
• circulation 

The removal of all the wastes produced by the cells of the body. 

• excretion 
• metabolism 
• digestion
• respiration 

The ability of an organism to maintain a stable internal environment even when the external environment changes. 

• homeostasis 
• circulation (transport)
• reproduction 
• synthesis 

All the chemical reactions that occur within the cells of an organism. 

• metabolism 
• circulation (transport) 
• digestion 
• respiration