Describe the structure of cardiac muscle; Identify and describe the components of the conducting system that distributes electrical impulses through the heart; Compare the effect of ion movement on membrane potential of cardiac conductive and contractile cells; Relate characteristics of an electrocardiogram to events in the cardiac cycle

In order to speed up the heart rate and restore full sinus rhythm, a cardiologist can implant an artificial pacemaker, which delivers electrical impulses to the heart muscle to ensure that the heart continues to contract and pump blood effectively. These artificial pacemakers are programmable by the cardiologists and can either provide ...

2021年4月18日 · Automaticity is the ability of the cardiac muscle to beat at regular intervals by the pace maker cardiac cells to spontaneously depolarize and generate an action potential. Simultaneous activation of the whole cardiac muscle cells is achieved primarily by the conduction of action potentials from one cell to the next.

2024年10月20日 · Describe the structure of cardiac muscle tissue and cells; Identify and describe the components of the conducting system that distributes electrical impulses through the heart

In this article we will discuss about the transmission of cardiac impulse of humans with the help of suitable diagram. 1. Conduction over Atrial Muscle: Cardiac impulse originated at the S.A node is transmitted over both the atria like concentric waves and thus the P wave is produced in E.C.G. (Electrocardiogram).

involved in the cardiac action potential. Describe the mechanisms underlying excitation-contraction coupling. Relate the structure of myofilaments to their function in health and disease. Discuss the metabolic pathways that provide energy for cardiac muscle contraction. The heart is a biomechanical pump at the centre of our cir-culatory system.

2022年7月27日 · There are two major types of cardiac muscle cells: myocardial contractile cells and myocardial conducting cells. The myocardial contractile cells constitute the bulk (99 percent) of the cells in the atria and ventricles. Contractile cells conduct impulses and are responsible for contractions that pump blood through the body.

2019年10月4日 · Cardiac muscle is controlled by the autonomous nervous system. Cells in your brain and cells embedded throughout your heart act to release well-timed nervous impulses which signal your heart cells to contract in the correct pattern.

2023年7月30日 · The mechanism behind each coordinated contraction involves the cardiac muscle and electrical impulses. These contractile functions of the heart require ATP, which can be obtained through various substrates, including fatty acids, carbohydrates, proteins, and ketones.

Discuss the metabolic pathways that provide energy for cardiac muscle contraction. Key points Resting membrane potential arises from ionic concentration gradients across the cell membrane coupled with varying membrane permeability to each ion.