Which is TRUE regarding the regulation of heart rate?
A. Stimulation of parasympathetic nerves to the heart causes a slowing of heart rate.
B. A person whose heart lacks autonomic innervation has a faster heart rate at rest than a person with a normally innervated heart.
C. Stimulation of sympathetic nerves to the heart causes an increase in heart rate.
D. The slope of diastolic depolarization in SA node cell action potentials determines the heart rate.
E. All of the choices are true.
Answer: E
You might also like to view...
What is the shape of the inner ear canal?
What will be an ideal response?
Of the following muscle types, which type is not branched and has one nucleus per cell?
A) skeletal muscle B) cardiac muscle C) smooth muscle D) All of the above
Body weight is borne by the two largest tarsal bones: ________ and ________
A) navicular, calcaneus B) talus, calcaneus C) navicular, cuneiform D) talus, navicular
A substance that interferes with the active transport of Na+ in the cortical collecting ducts will also interfere with K+ reabsorption
Indicate whether the statement is true or false.