Cardiac Function and Regulation Quiz

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The heart is regulated by intrinsic and ______ control mechanisms.

extrinsic

Extrinsic control is the control exerted by something ______ of the heart.

outside

The sympathetic nervous system speeds the heart ______.

up

Sympathetic innervation of the heart comes from the ______ accelerator nerves.

cardiac Signup and view all the answers

The parasympathetic nervous system slows the heart ______.

down Signup and view all the answers

Parasympathetic innervation of the heart comes from the ______ nerve.

vagus Signup and view all the answers

The ______ nervous system increases heart rate by depolarizing the pacemaker cells of the SA node.

sympathetic Signup and view all the answers

The ______ nervous system slows the heart rate by hyperpolarizing the pacemaker cells of the SA node.

parasympathetic Signup and view all the answers

The heart rate increases when the heart is exposed to ______, a hormone produced by the adrenal medulla.

epinephrine Signup and view all the answers

An '______ rush' experienced while riding a rollercoaster results in a faster heart rate.

adrenaline Signup and view all the answers

______ serves much the same purpose as the sympathetic nervous system and speeds up the heart's rate of contraction.

Epinephrine Signup and view all the answers

Heart rate is exclusively regulated via ______ mechanisms.

extrinsic Signup and view all the answers

Epinephrine and ______ are two catecholamines.

norepinephrine Signup and view all the answers

Epinephrine and norepinephrine bind to ______ adrenergic receptors in the heart.

beta-1 Signup and view all the answers

Binding to beta-1 adrenergic receptors increases ______, which enhances the presence of Ca2+ and increases contractility.

cAMP Signup and view all the answers

Afterload is the pressure that the ventricles have to work against to ______ blood from the heart.

expel Signup and view all the answers

As mean arterial pressure (MAP) increases, the heart has to work ______ to get the same amount of blood out.

harder Signup and view all the answers

Afterload is the pressure that the ventricles have to work against to ______ blood from the heart.

expel Signup and view all the answers

As mean arterial pressure (MAP) increases, the heart has to work ______ to get the same amount of blood out.

harder Signup and view all the answers

To demonstrate the idea of afterload, think about someone pushing a ______ up a steep hill.

boulder Signup and view all the answers

Hypertension is so dangerous because it makes the heart pump ______ to get the same volume of blood to the rest of the body.

harder Signup and view all the answers

Afterload, therefore, increases as ______ (MAP) increases.

mean arterial pressure Signup and view all the answers

Stroke volume depends not only on the force-generating capacity of the ventricles, but also on the ______ that it has to work against.

force Signup and view all the answers

Afterload is the pressure that the ventricles have to work against to ______ blood from the heart.

eject Signup and view all the answers

Increased contractility refers to the increased force generated for any given end ______ volume.

diastolic Signup and view all the answers

Sympathetic innervation and circulating ______ can increase ventricular contractility without changing end diastolic volume.

epinephrine Signup and view all the answers

As mean arterial pressure (MAP) increases, the heart has to work ______ to get the same amount of blood out.

harder Signup and view all the answers

An '______ rush' experienced while riding a rollercoaster results in a faster heart rate.

adrenaline Signup and view all the answers

Increased atrial pressure will result in an increased atrial contractility, which will then cause an increase in ventricular ______.

filling Signup and view all the answers

Cardiac Function and Regulation Quiz

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Questions and Answers

The heart is regulated by intrinsic and ______ control mechanisms.

Extrinsic control is the control exerted by something ______ of the heart.

The sympathetic nervous system speeds the heart ______.

Sympathetic innervation of the heart comes from the ______ accelerator nerves.

The parasympathetic nervous system slows the heart ______.

Parasympathetic innervation of the heart comes from the ______ nerve.

The ______ nervous system increases heart rate by depolarizing the pacemaker cells of the SA node.

The ______ nervous system slows the heart rate by hyperpolarizing the pacemaker cells of the SA node.

The heart rate increases when the heart is exposed to ______, a hormone produced by the adrenal medulla.

An '______ rush' experienced while riding a rollercoaster results in a faster heart rate.

______ serves much the same purpose as the sympathetic nervous system and speeds up the heart's rate of contraction.

Heart rate is exclusively regulated via ______ mechanisms.

Epinephrine and ______ are two catecholamines.

Epinephrine and norepinephrine bind to ______ adrenergic receptors in the heart.

Binding to beta-1 adrenergic receptors increases ______, which enhances the presence of Ca2+ and increases contractility.

Afterload is the pressure that the ventricles have to work against to ______ blood from the heart.

As mean arterial pressure (MAP) increases, the heart has to work ______ to get the same amount of blood out.

Afterload is the pressure that the ventricles have to work against to ______ blood from the heart.

As mean arterial pressure (MAP) increases, the heart has to work ______ to get the same amount of blood out.

To demonstrate the idea of afterload, think about someone pushing a ______ up a steep hill.

Hypertension is so dangerous because it makes the heart pump ______ to get the same volume of blood to the rest of the body.

Afterload, therefore, increases as ______ (MAP) increases.

Stroke volume depends not only on the force-generating capacity of the ventricles, but also on the ______ that it has to work against.

Afterload is the pressure that the ventricles have to work against to ______ blood from the heart.

Increased contractility refers to the increased force generated for any given end ______ volume.

Sympathetic innervation and circulating ______ can increase ventricular contractility without changing end diastolic volume.

As mean arterial pressure (MAP) increases, the heart has to work ______ to get the same amount of blood out.

An '______ rush' experienced while riding a rollercoaster results in a faster heart rate.

Increased atrial pressure will result in an increased atrial contractility, which will then cause an increase in ventricular ______.

Afterload is the pressure that the ventricles have to work against to ______ blood from the heart.

An increase in ______ pressure increases the afterload on the ventricles.

Factors that decrease ______ decrease the afterload on the ventricles.

Increased ______ increases the afterload on the ventricles.

Decreased ______ compliance increases the afterload on the ventricles.

The ______ nervous system increases afterload by causing vasoconstriction.

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