Cardiovascular Physiology Exam Questions
with correct answers provided
Autorhythmicity - ✅✅The heart's ability to trigger its own contractions
Cardiac muscle and some types of smooth muscle have the ability to contract without any external
stimuli - ✅✅True
Skeletal muscle requires depolarizing signals from the nervous system to contract - ✅✅True
The total cardiac action potential lasts 250-300 msec and has __________ phases - ✅✅Five
The ______ nerve carries parasympathetic signals to the heart - ✅✅Vagus
Stimulation of the parasympathetic nervous system increases the heart rate and the force of contraction
of the heart - ✅✅False
What is vagal escape? - ✅✅when the heart resumes to beat again after stopping momentarily
The frog heart is different from the human heart in that it contains - ✅✅Two atria and a single,
incompletely divided ventricle
The _________ node has the fastest rate of depolarization and determines the heart rate -
✅✅sinoatrial (SA) node
Humans are able to maintain an external body temperature of 35.8-38.2C in spite of environmental
conditions and are referred to as - ✅✅Homeotherms
Sympathetic nerve fibers release epinephrine and ACh at their cardiac synapses - ✅✅False
with correct answers provided
Autorhythmicity - ✅✅The heart's ability to trigger its own contractions
Cardiac muscle and some types of smooth muscle have the ability to contract without any external
stimuli - ✅✅True
Skeletal muscle requires depolarizing signals from the nervous system to contract - ✅✅True
The total cardiac action potential lasts 250-300 msec and has __________ phases - ✅✅Five
The ______ nerve carries parasympathetic signals to the heart - ✅✅Vagus
Stimulation of the parasympathetic nervous system increases the heart rate and the force of contraction
of the heart - ✅✅False
What is vagal escape? - ✅✅when the heart resumes to beat again after stopping momentarily
The frog heart is different from the human heart in that it contains - ✅✅Two atria and a single,
incompletely divided ventricle
The _________ node has the fastest rate of depolarization and determines the heart rate -
✅✅sinoatrial (SA) node
Humans are able to maintain an external body temperature of 35.8-38.2C in spite of environmental
conditions and are referred to as - ✅✅Homeotherms
Sympathetic nerve fibers release epinephrine and ACh at their cardiac synapses - ✅✅False
