Question

A(n) ______ in the SNS rate coupled with a(n) ______ in the vagal rate leads to a greater increase in heart rate than would occur with either change alone.

increase, increase

decrease, decrease

increase, decrease

decrease, increase

Answer 1

An increase in the SNS rate coupled with a decrease in the vagal rate leads to a greater increase in heart rate than would occur with either change alone.

Step-by-step explanation:

An increase in the SNS rate coupled with a decrease in the vagal rate leads to a greater increase in heart rate than would occur with either change alone.

The normal sinus rhythm of the heart is influenced by the autonomic nervous system through sympathetic and parasympathetic nerves. The parasympathetic nerves act to decrease the heart rate, and the sympathetic nerves act to increase the heart rate.

Increased physical activity is detected by receptors in muscles, joints, and tendons. These receptors send nerve impulses to the cardiovascular centers, causing sympathetic nerves to increase the heart rate.

Answer 2

An increase in the SNS rate coupled with a decrease in the vagal rate leads to a greater increase in heart rate than would occur with either change alone.

Step-by-step explanation:

An increase in the SNS rate coupled with a decrease in the vagal rate leads to a greater increase in heart rate than would occur with either change alone.

The normal sinus rhythm of the heart is influenced by the autonomic nervous system through sympathetic and parasympathetic nerves. The parasympathetic nerves act to decrease the heart rate, and the sympathetic nerves act to increase the heart rate.

Increased physical activity is detected by receptors in muscles, joints, and tendons. These receptors send nerve impulses to the cardiovascular centers, causing sympathetic nerves to increase the heart rate.