Baroceptors in the carotid sinus monitor blood pressure. when the carotid sinus is stretched by blood pressure or manipulation, a feedback response through the vagus nerve can be blocked by atropine. how would external stimulation of the carotid artery, such as carotid massage, affect the heart rate?

c.more precipitation,but only when emission levels.

and after water is usually warmed by the sun the water temperature raises and then evaporates .

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.