The heart MUST receive electrical stimulation from the nervous system in order to contract.

Which of the following hormones is INCORRECTLY with its target organ?

The ______________ are the last part of the electrical conducting system of the heart which stimulates the ventricular myocardium.

Which of these regulatory mechanisms would occur in response to a sudden increase in blood pressure?

Select all correct answers Which is(are) functions performed by the fibrous skeleton of the heart?

Select all correct answers. Calcitonin

Select all correct answers. Calcitonin

Hormones from the adrenal medulla prolong the effects of the sympathetic nervous system.

The pressure of arterial blood is _____ the pressure of venous blood.

An autorhythmic heart cell is one in which