What are the Effects of sympathetic nerves and plasma epinephrine on the arterioles in skeletal muscle?

Q: Following a large increase in sympathetic output from the vasomotor center, what tissues will get…

A: The sympathetic nervous system consists of the vasomotor center which is a part of the medulla…

Q: In what ways are autorhythmic fibers similar to and diff erent from contractile fibers?

A: Heart is a four chambered cardiovascular organ pumping blood throughout the body. The auricles and…

Q: What effect does a drug have that block the calcium channel in a cardiac muscle cells? What is the…

A: A calcium channel is an ion channel which shows selective permeability to positively charged calcium…

Q: Define physiologic contracture

A: Muscles are the largest delicate tissues of the musculoskeletal framework. Muscle is inferred from…

Q: What main effect do endothelin, angiotensin II, and norepinephrine have on the smooth muscle of…

A: The endothelin is secreted by vascular endothelial cells.   Angiotensin 2 is secreted by kidneys.…

Q: Explain the structure of cardiac muscle and how it helps produce coordinated contraction in each…

A: Cardiomyocytes or cardiac muscle cells form a highly branched cellular network in the heart. They…

Q: What are the causes of Hypertrophic cardiomyopathy?

A: A complex heart disease where the heart muscles get thickened is called as hypertrophic…

Q: How does the SNS control vascular smooth muscle in arterioles?

A: The autonomic nervous system possesses two major divisions, sympathetic and parasympathetic nervous…

Q: Describe how the autonomic release of noradrenaline onto vascular smooth muscle cells that…

A: The autonomic nervous system releases noradrenaline (also known as norepinephrine) into vascular…

Q: Explain in detail why the neurotransmitter acetylcholine has different effects in skeletal vs.…

A: Acetylcholine lie outside the CNS which transmits synapsis and at synapse, there are released some…

Q: Describe the structural and functional properties of cardiac muscle, and explain how it differs from…

A: Muscle is a soft tissue like structure which is primarily responsible for the movement in the body.…

Q: Compare and contrast the contractile mechanisms and the means of activation of skeletal and smooth…

A: Skeletal muscle  Skeletal muscles are attached to bones. These are long, cylindrical, striated…

Q: Explain the following terms: Preload, contractility, afterload

A: In human physiology, cardiac output refers to the total amount of blood pumped by the human heart…

Q: How does the excitation-contraction coupling in skeletal muscles and in cardiac muscles differ?

A: Introduction: The excitation/ depolarization of the muscle fiber results in developing action…

Q: Why can we say that cardiac muscle contraction is graded?

A: Cardiac muscle contraction refers to the contraction occurring within the cardiac muscles of the…

Q: If branch A is twice the length of branch B, what is true regarding the resistance in branch A…

A: The Poiseuille's law states that the flow of fluid is related to various factors including length…

Q: Describe the properties of the cardiac muscle, including automaticity, excitability, conductivity,…

A: Cardiac muscle or heart muscle is also known as myocardium. It is one of the three kinds of…

Q: Explain why a patient with congestive heart failure may have difficulty in generating enough muscle…

A: The cardiovascular system in the human body functions to circulate the blood in the body. It is also…

Q: What happens to systemic blood pressure when the smooth muscle of muscular atries contract?

A: Blood vessels : Blood capillaries are artery ,vein , capillaries are made by three layers - Tunica…

Q: Compare the structure and function of arteries and veins, and the significance of the skeletal…

A: The heart is the organ which plays an important role in the transport of blood and nutrients.the…

Q: What effect does hypocalcemia have on the contractile force developed by cardiac muscle?

A: Calcium plays an important role in the activity of muscles. It is released in the muscles from the…

Q: Mrs B had a heart transplant and as a result, she no longer has nerve supply to her heart. Keeping…

A: The heart transplant, or a cardiac transplant, is a careful transfer system performed on patients…

Q: Discuss in details the unique structure  of  a  cardiac muscle  fiber

A: The heart is a smooth muscle organ that pumps blood throughout the body. Oxygenated blood collected…

Q: Why, in physiological terms, does systolic blood pressure increase from rest to exercise and why…

A: Introduction: Metabolic requirements of the body at rest or during exercise are met by supplying…

Q: During strenuous exercise, which of the following changes most infuences total peripheral…

A: Introduction: According to the American Heart AssociationTrusted Source, you must exert yourself at…

Q: For cardiac muscle action potentials, describe ionmovement during the depolarization, early…

A: The cardiac muscles or cardiac myocytes contract and relax more than 100,000 times a day without…

Q: How does the cardiac contractile refractory period differ from a typical skeletal muscle refractory…

A: The muscle fibers are multi-nucleated (exclusively in the case of skeletal muscle fibers),…

Q: What effect does a pacemaker potential have on a smooth muscle cell?

A: Pacemaker cells, which are specialised cardiac muscle cells that directly control heart rate,…

Q: How does a positive inotropic agent decrease the duration of cardiac muscle contraction?

A: Cardiac muscle contraction occurs within the heart muscle when myosin protein binds with adenosine…

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.