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What is the difference between inotropic and cronotropic?
Inotropic refers to the force of contraction of the heart muscle, while chronotropic refers to the heart rate. Inotropic agents affect the strength of the heart's contractions, while chronotropic agents affect the heart rate.
What hormone increases heart rate and forces contraction?
Epinephrine
What happens to a frogs heart rate when temperature changes?
the rate of contraction increases with a rise in temperature and decreases with a fall in temperature
Stimulation of which would cause an increase in heart rate and contraction strength?
beta 1 receptors
Does activation of the parsympathetic nervous system increase heart rate but not the myocardial contraction strength?
No, the parasympathetic n.s. will slow the heart down, the sympathetic n.s. will increase heart rate.
In what way do the parasympathetic and the sympatheticnervous systems work together?
Yes. The vagus nerve is a parasympathetic nerve that is almost always stimulating the healthy heart to have a heart rate less than the inherent rate of the SA node. The sympathetic innervation on the heart is minimal and only important during exercise.
Increased return of the blood to the heart stretche's the muscle which does what?
increases the heart rate. ---- Increases the force of contraction, and therefore, the amount of blood pumped out at a time. Think of a rubber band...the more you stretch it, the harder it contracts when you let go.
How does laughing affect your heart rate?
It increases your heart rate.
What hormone increases heart rate and force of contraction?
Cardiac output is defined by the equation HR (heart rate) x SV (stroke volume). Anything that increases either of these will increase the cardiac output. Increasing heart rate: exercise, anxiety, caffeine, amphetamines, cocaine, other medications Increasing stroke volume: certain medications (digoxin, etc), lower heart rates
Why your heart rate increases when you run?
Your heart rate increases as it has to pump oxygenated blood around the body.
What does nicotine do to your heart rate?
It affects the heart and blood pressure by increases them both. An increased heart rate and blood pressure can be serious depending on how much it increases them both. It increases heart rate and blood pressure and increases the workload on the heart
What was the effect of sodium ions on heart rate?
increases the heart rate
