explain how heart rate is controlled by the heart itself and by the ANS

Q: Parasympathetic stimulation decreases the heart rate by Decreasing permeability of SA node cells…

A: Parasympathetic postganglionic nerve fibers tend to be vagus nerve and are cholinergic in nature.…

Q: Trace a drop of blood from Left Ventricle to the Upper Limb

A: Arteries are the blood vessels that carry blood from the heart to different parts of the body. All…

Q: Consider the equation cardiac output (CO) = stroke volume (SV) X heart rate Which of the following…

A: Afterload is the pressure the heart must work against to eject blood during systole. When…

Q: Explain isovolumetric ventricular relaxation?

A: The time between the atrial contraction and ventricular relaxation or between one heartbeat's end to…

Q: Describe two effects on the heart of sympathetic nervous system stimulation.

A: Introduction: The nervous system is categorized into the peripheral nervous system (PNS) and the…

Q: Where are the cardiovascular control centers located?

A: The cardiovascular system is made up mostly of the circulatory system, that is, the system of blood…

Q: Describe how GSR and Heart rate interact with the PSNS and SNS

A: GSR (Galvanic Skin Response) and heart rate are two physiological measures that are often used to…

Q: Describe how the heartbeat is controlled

A: Sympathetic nervous system which includes the ‘fight and flight responses’ release neurotransmitter…

Q: Describe how blood flows through the heart.

A: The human heart is responsible for pumping and transportation of blood throughout the body via the…

Q: Explain the structural differences between the atria and ventricles.

A: The heart is the one of the important organs of our circulatory system. The heart is a fist sized,…

Q: Which of the following statements are true? (a) The left ventricle wall is thicker than the right…

A: It is related to the circulatory system

Q: Compare and contrast sympathetic and parasympathetic control of heart rate

A: The sympathetic and parasympathetic nervous systems are part of the autonomic nervous system that…

Q: If you were running late for lab and had to run to get there on time, the sympathetic neurons of…

A: The sympathetic nervous system (or SNS) is involved in the innervation of major organ systems across…

Q: Explain differences between action potentials of cardiac muscle cells and those in nodal cells of…

A: On the surface of the heart, muscle fibers are arranged to form a fused interconnected mass termed a…

Q: Fewer action potentials travel up the afferent nerves to the medullary cardiovascular center, and…

A: The cardiovascular center is part of the autonomic nervous system and is responsible for controlling…

Q: Explain why the walls of the atria are thinner than those of theventricles, and why the walls of the…

A: The heart of human beings is four-chambered, comprising of two atrial chambers and two ventricular…

Q: Predict the effects of a drug that blocks the sympathetic nervous system on blood pressure and heart…

A: Sympathetic nervous system (SNS) and para sympathetic nervous system are the two main divisions of…

Q: Explain why ventricles are more muscular than atria

A: Heart ventricles: The large, lower chembers of the fibromuscular organ(heart) that collect and expel…

Q: How do the sympathetic and parasympathetic divisions of the autonomic nervous system adjust heart…

A: Heart rate can be defined as the pace at Which the heartbeats in a minute. The average heart rate of…

Q: What effect will an increase in parasympathetic activity have on heart rate, force of contraction,…

A: The  Autonomic nervous system (ANS) has two interacting systems: the sympathetic and parasympathetic…

Q: Define atrioventricular (AV) node

A: The atrioventricular (AV) node is situated in the right posterior portion of the inter-atrial…

Q: Why would blocking the action of a vasoconstriction lower blood pressure?

A: Circulatory system is a type of body system in which circulation of body fluids occur and…

Q: Discuss the baroreceptor reflex and explain its influence on blood pressure and heart rate.

A: Homeostasis is the mechanism that is performed by the body's physiological processes to maintain…

Q: Parasympathetic – Slows heart rate because it increases flow through _____ channels and decreases…

A: The parasympathetic nervous system can be defined as the type of nervous system that conserves the…

Q: Roberto is a 78-year-old male who has recently been diagnosed with Class III Congestive Heart…

A: Congestive heart failure refers to the loss of pumping efficiency of the heart.  Due to the low…

Q: explain how heart rate and stroke volume are regulated include the role of parasympathetic ans…

A: Heart rate: Is the number of times the heart beats in a minute. It is regulated by the autonomic…

Q: If the cardioinhibitory center of the medulla oblongata were damaged, which division of the…

A: The rhythmic contraction of the heart is under the influence of the autonomic nervous system and is…

Q: Explain why heart attack victims will often exhibit pain in the left shoulder and arm.  How is it…

A: The heart is an organ that is a muscular organ that pumps blood into the circulation. The heart lies…

Q: Why is your heart rate high after running a short distance, but not as elevated after running a much…

A: Introduction: To maintain blood circulation throughout the body, the heart beats nonstop. Its rate…

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: Identify the locations of the four ventricles and thestructures that connect them

A: The ventricles are mechanisms that contain and carry cerebrospinal fluid in the cranial cavity. The…

Q: What effect would stimulating the acetylcholine receptors of the heart have on cardiac output?

A: The heart is the primary muscular organ of the cardiovascular system that is responsible for pumping…

Q: In response to a severe hemorrhage, blood pressure lowers, the heart rate increases dramatically,…

A: The human body is made of different organ systems. Each of them is involved in maintaining the…