Relatively few drugs act by mechanisms other than combination with receptor sites on cells. What drugs do not act on receptor sites? (Select all that apply.)

The drugs that do not act on receptor site are:

Purines, Antacids , Osmotic diuretics .

Explanation:

To say a drug acts by mechanism means that it that the drug is engineered to produce a specific effect on the body by acting on enzymes or receptors.

Receptors are molecules made up of protein and can be found in target cells.

There are a few drugs that do not interact with enzymes or receptors to create the expected results on the body. Examples of the same are given above.

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what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.