Question

which segment of the intrinsic cardiac conduction system directly depolarizes the atria?

When blood flowing to tissues reaches the ______________, pulsations cannot be detected because pulse pressure falls to 0 mmHg. Mean arterial blood pressure (MAP) also falls most significantly at this segment.

Which segment of the intrinsic cardiac conduction system directly depolarizes the atria?

Which of the following changes would decrease total peripheral resistance (TPR)?

Why are intercalated discs vital to normal cardiac function

Which structures are found below the endocardium lining the inner surface of each auricle

Norepinephrine (a sympathetic neurotransmitter) and epinephrine (an adrenal hormone) exert their effects on the heart through their interaction with __________________ receptors.

sympathetic stimulation of the heart occurs through the _______________, while parasympathetic stimulation of the heart occurs through the ________________.

What pressure is responsible for filtration and for driving fluids from blood plasma into the interstitial space in tissues in the arterial end of capillaries?

The phase of the cardiac cycle that occurs when the atrioventricular valves and semilunar valves are closed while ventricular volume is constant but pressure rises is

Answer 1

1. Sinoatrial node ,segment of the intrinsic cardiac conduction system directly depolarizes the atria.

2.When blood flowing to tissues reaches the Pulmonary capillaries, pulsations cannot be detected because pulse pressure falls to 0 mmHg. Mean arterial blood pressure (MAP) also falls most significantly at this segment.

3.Sinoatrial node ,segment of the intrinsic cardiac conduction system directly depolarizes the atria.

4.Vasodilation  would decrease total peripheral resistance (TPR)

5.Intercalaled disc contains gap junctions which makes the connection between cells and define the boundary. In cardiac muscles,it maintains the cell-cell communication which is required for coordinated muscle contraction and blood circulation.