The suggested recording sequence is written below Before sta

The suggested recording sequence is written below. Before starting the experiment, you should predict what effect these treatments will have on the heart. When testing, do not allow the heart to stop. If the rate should decrease dramatically, flush the heart with room-temperature saline.

Solution

1. Effect of Hot treatment on heart

When temperature rise, the heart beat faster and pump blood harder to the surface of the skin to manage with sweating to cool the body. If the body is not able to cool itself enough, the strain is put on the heart, and organs can suffer damage called heat stroke.

2. Effect of Cold treatment on heart

3. Effect of Acetylcholine 2.5% on heart

Acetylcholine is a neurotransmitter or a chemical that transmits signals through the nervous system. Acetylcholine generally has inhibiting effects, slowing the heart rate and decreasing the blood pressure, but it also causes some sympathetic effects such as more sweating or making the hair stand on end.

4. Effect of Atropine 5% treatment on heart

Atropine causes the heart rate to increase and makes efficient atrioventricular conduction by blocking the parasympathetic influences on the heart.