What causes resting heart rates to increase?

Answer 1

Taking the two formulas: Cardiac Output = Heart rate x Stroke Volume Blood Pressure = Cardiac Output x Peripheral Resistance When Blood pressure drops, either cardiac output (Heart rate or Stroke Volume) has to increase, or peripheral resistance (Aterioles Vasconstriction) has to increase. When Blood pressure drops, this is detected by baroreceptors in the carotid bodies and arch of the aorta, these send signals to the cardio vascular centre within the Medulla, which sends signals back to the heart to increase the heart rate and force of contraction. The medulla also sends signals to arterioles to constrict and therefore raise blood pressure. Hope this helps Colin

Answer 2

they heart pumps blood around the body .within that blood lies oxygen .when you excercise or get nervous your cells need more oxygen and water so your heart pumps faster your pulse determinds how many times your heart beats per minute

Answer 3

Stress causes heart rate to increase.

Stress can be provided by: (1) scary situations such as Horror movies or being likewise scared. (2) being excited, like on an amusement park roller coaster.

(3) exerting strength, such as exercising in a weight room, jogging, or otherwise working out. This is the best for one's heart and health.

(4) Worrying ("stress"ing out) about something, like public speaking or some important interview or event. This is the worst for one's heart and health.

Answer 4

When you do excercise, or breath in and out quickly, your hearbeat increases. This is because you need more oxygen to be delivered to your muscles (oxygen is what muscles feed on) and you do this via. blood(blood carries oxygen). The blood gets to your muscles by your heart pumping it around.

Now, if your muscles need more oxygen and quick, your heart has to pump it round quicker to the muscles - and so your heart beat increases.

Hope this is helpful!

Answer 5

because you are extersicing and your heart needs oxygen to give to your muscles