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Organisms are described as “open systems” in thermodynamics. What does this mean?

________ are leaflets of tissue that control the flow of blood from the atria to the ventricles. 

Which of the following is a type of vaccine? 

The uterine lining is called the __________.

Sperm form in the __________ and are stored in the _____________.

Which of the following processes includes all the others in the list?

Aquaporins are transport proteins that allow water to enter cellular membranes.

How is the cell membrane organized? Describe the various components that make up the membrane, how they are oriented, and what their functions are. Include how they are oriented. Be as detailed as possible. 

Which of the following correctly describes a membrane transport process and its function?

The sodium potassium pump is “electrogenic”: it contributes to the membrane potential/voltage.