Which has the greater concentration of hydrogen ions ([H+]), a substance with a pH of 5 or a substance with a pH of 4? 

Which organ system removes carbon dioxide from the bloodstream?     

This type of feedback enhances/amplifies the effects of variations from normal.

The branch of anatomy that deals with the structure of organs and tissues that are visible to the naked eye is called ____________ anatomy.

The above equilibrium can be driven by the removal of carbon dioxide (e.g. normal exhaling). As a result, the reaction will _____; this result can prevent the pH of blood from becoming _____.

The __________ system coordinates activities of other body systems (e.g. muscle) and responds to sensations.

Which of the followings is NOT associate with lymphatic system?

________ can lower the activation energy of a chemical reaction.

__________ is the process in which __________ forces water and small solutes, such as salts, through narrow clefts between capillary cells.

In this feedback loop, what is the receptor?