How can body temperature influence the heart rate?

Answer 1

There is a direct correlation between heart rate and temperature. An increase in temperature, from normal, causes heart rate to increase. A decrease in temperature, from normal, causes heart rate to decrease.

>>That is not completely true. For A science fair project i tested this and we found that in extremes of hot and cold climates our heart rate increased both times

Answer 2

The blood vessels of the body, particularly the peripheral blood vessels (i.e those of the skin) can dilate or contract depending on body temperature. When the temperature of the body drops, the peripheral blood vessels contract to conserve heat. When the body's temperature increases above normal, the peripheral blood vessels dilate to allow more heat to escape.

="h2headingh2"style="color:rgb(0,0,0);"name="the_blood_vessels_of_the_body,_particularly_the_peripheral_blood_vessels,_i.e_those_of_the_skin;_can_dilate_or_contract_depending_on_body_temperature._when_the_temperature_of_the_body_drops,_the_peripheral_blood_vessels_contract_to_conserve_heat._when_the_body's_temperature_increases_above_normal,_the_peripheral_blood_vessels_dilate_to_allow_more_heat_to_escape._the_blood_vessels_dilating_lowers_the_blood_pressure_in_the_body,_because_the_blood_distribution_has_increased_to_areas_which_previously_had_less_distribution._the_body_now_has_to_compensate,_because_of_the_change_in_pressure_less_blood_is_being_pumped_to_the_vital_organs_of_the_body._it_does_this_by_increasing_the_cardiac_output,_the_amount_of_blood_pumped_out_of_the_heart_per_given_time._cardiac_output_can_be_increased_by_increasing_the_heart_rate._thus_an_increase_in_temperature,_through_the_vasodilation_of_blood_vessels_causes_a_drop_in_blood_pressure,_which_is_compensated_for_by_increasing_the_cardiac_output,_which_can_be_achieved_through_increasing_the_heart_rate._therefore_heart_rate_increases_when_temperature_increases.">

The dilation of the blood vessels lowers the blood pressure in the body, because the blood distribution has increased to areas which previously had less distribution. The body now has to compensate; because of the change in pressure less blood is being pumped to the vital organs of the body. So the body compensates by increasing the cardiac output, the amount of blood pumped out of the heart per given time. Cardiac output can be increased by increasing the heart rate. Thus an increase in temperature causes the vasodilation of blood vessels causes a drop in blood pressure, which is compensated for by increasing the cardiac output, which can be achieved through increasing the heart rate. Therefore heart rate increases when temperature increases.="h2headingh2"style="color:rgb(0,0,0);"name="the_blood_vessels_of_the_body,_particularly_the_peripheral_blood_vessels,_i.e_those_of_the_skin;_can_dilate_or_contract_depending_on_body_temperature._when_the_temperature_of_the_body_drops,_the_peripheral_blood_vessels_contract_to_conserve_heat._when_the_body's_temperature_increases_above_normal,_the_peripheral_blood_vessels_dilate_to_allow_more_heat_to_escape._the_blood_vessels_dilating_lowers_the_blood_pressure_in_the_body,_because_the_blood_distribution_has_increased_to_areas_which_previously_had_less_distribution._the_body_now_has_to_compensate,_because_of_the_change_in_pressure_less_blood_is_being_pumped_to_the_vital_organs_of_the_body._it_does_this_by_increasing_the_cardiac_output,_the_amount_of_blood_pumped_out_of_the_heart_per_given_time._cardiac_output_can_be_increased_by_increasing_the_heart_rate._thus_an_increase_in_temperature,_through_the_vasodilation_of_blood_vessels_causes_a_drop_in_blood_pressure,_which_is_compensated_for_by_increasing_the_cardiac_output,_which_can_be_achieved_through_increasing_the_heart_rate._therefore_heart_rate_increases_when_temperature_increases.">

Answer 3

In heat gain, heart rate increases as the result of changes in the core body temperature. Dressing appropriately is the most important consideration to maintain the bodies core temperature. Dehydration causes heart rate to increase.

In heat loss, heart rate decreases as adjustments result in improved exercise capacity to heat exposure but minimally to cold stress. This generally takes about 10 days. Shivering can increase the heart rate significantly to increase core temperature. Considerable water can be lost from the respiratory tract during cold exposure when exercising which results in elevated heart rates (dehydration effect on heart rate).

Answer 4

Heart rate can be affected by many things, but heat has some impact on the increase of heart rate too. Heat causes you to sweat and because you are hot, the heart has to work at a faster rate to keep up with the sudden changes that the body is experiencing.

Answer 5

Yes it can. The colder you are the slower your heart rate will get. Especially in situations like hypothermia.

Answer 6

Lower temperatures cause heart rate to slow.

Answer 7

With rise of one degree Fahrenheit, your heart rate rises by 10 beats. The only exception is typhoid fever. Heart is too toxic to beat at such a higher rate in typhoid fever.

Answer 8

Generally, if it's hot, the heart rate increases. The blood pressure goes down.

Answer 9

If the temperature is either very high or low, the heart rate can increase to pump more blood into the body.