When the vagus nerve is stimulated (A), a rapid drop in arterial pressure occurs, when the depressor nerve is stimulated (B), the pressure decreases smoothly. The different nature of changes in blood pressure in these cases is due to the fact that

Q: A(n) ...... in blood pressure...... the baroreceptors and thus..... the sympathetic…

A: The blood circulating through the cardiovascular system is responsible for the transport of oxygen…

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: Blood flow to the skeletal muscles increases with exercise. Explain how the autonomic nervous system…

A: The functioning of every tissue requires energy which is provided by the generating metabolic energy…

Q: A blockage in the right internal carotid does not necessarily cause a loss of blood supply to the…

A: The carotid arteries are important blood vessels of the neck that deliver the face, neck, and brain…

Q: Excess extracellular potassium functions to: (A) decrease the resting membrane potential of the…

A: The heart is part of the cardiovascular system that helps in transportation of blood. Deoxygenated…

Q: If blood pressure was to drop, how is the signal transmitted to the central nervous system?   a)…

A: Introduction Blood pressure is the pressure of blood pushing against the walls of our arteries. Our…

Q: Total blood flow in the cerebral circulation a. varies with systemic arterial pressure. b. is…

A: Cerebral circulation: It is the transportation of blood in the brain through a network of blood…

Q: Explain how vascular resistance and blood flow are regulated by (a) sympathetic adrenergic fibers,…

A: The heart is a muscular organ that pumps blood through the blood vessels of the circulatory system…

Q: The forearm and hand would continue to receive oxygenated blood if the complete blockage occured at…

A: Arteries can be defined as the blood vessels of the body that are principally accountable for…

Q: As a result of ventricular depolarization (T wave), calcium ions are returned to the sarcoplasmic…

A: T wave on ECG denotes ventricular repolarisation or relaxation. It occurs after the QRS segment…

Q: Blood velocity is slowest in the capillaries  A. Explain the mechanics of why blood slows down in…

A: Blood is in a state of continuous motion with in the cardiovascular system, it circulates from heart…

Q: Danny is an overweight, hypertensive, 58-year-old male that experiences heavy pressure on his chest…

A: As is mentioned in question , Danny is overweight, hypertensive and has chest pain .In medical…

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: At point A, note that mean arterial blood pressure (MABP) is slightly lowered despite the large fall…

A: Cardiac output is the amount of blood pumped by the heart in one minute and is determined by the…

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: The Alexandrian physician Herophilus, originally from Chalcedon, was able to make which of the…

A: That a weak but rapid pulse was a sign of significantly increased blood volume: This conclusion…

Q: Blood pressure can be significantly affected by (a) cardiac output (b) peripheral resistance (c)…

A: The wall of the arteries experiences a force that is exerted by the blood, this force is called…

Q: The muscle cells of a heart chamber work as a  functional syncytium.  In terms of heart function…

A: The heart is a meso-dermally derived organs. The walls of heart are made up of cardiac muscles.…

Q: While downhill skiing, Jerry lost control and appeared to hit into a tree, chest first. The ski…

A: Triage: Determining the degree of urgency in the patient's treatment depending on the severity.…

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: Hemorrhage is a serious, life-threatening situation. Discuss the various reflex compensatory…

A: Hemorrhage is a clinical condition which arises when the volume of the blood is drastically…

Q: Based on Starling’s Law, how would increased blood flow to the heart during diastole (remember, this…

A: The cardiovascular system is one of the 11 major body organ systems that is concerned with the…

Q: After her workout, Arlene lies down on a mat to stretch out her leg muscles. She stands up suddenly…

A: Whenever an individual lies horizontally and exercises and then stands vertically, the blood supply…

Q: How does the barorecptor reflex explain the decrease in heart rate during carotid sinus massage?

A: The carotid sinus and aortic arch contain baroreceptors, which are mechanoreceptors. Their job is to…

Q: Why, in physiological terms, does heart rate increase during exercise? Discuss contributions from…

A: Heart rate is the average number of times per minute that the heart beats. For adults, this ranges…

Q: Which of the following statements is correct regarding the mechanisms of regulation of intercranial…

A: The adult cranium is rigid, hence cannot expand upon changes in intracranial pressure.  Thus the…

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…

Q: When you are cold, your blood vessels contract. However, your heart rate and blood pressure…

A: When the temperature increases or decreases beyond the set point of the body there is a…

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: Women in the late nineteenth and early twentieth centuries wore whalebone corsets that severely…

A: The whalebone corsets causes various discomforts when worn. It can also impede the digestion and…

Q: If the vagal nerves to the heart were cutthe result would be that A) the heart would stop, since the…

A: The vagus nerve generally referred to as the pneumogastric nerve, is the 10th cranial nerve or CN X,…

Q: During vigorous exercise, vasoconstriction occurs in the digestive organs, while vasodilation occurs…

A: The physical activity of the body maintains physical and mental health. Those exercises that require…

Q: Your grandfather was told that his SA node (pacemaker) has stopped functioning. Explain how his…

A: The heart is a muscular organ that pumps blood through the blood vessels of the circulatory system…

Q: Pulse is a direct measure of(A) blood pressure.(B) stroke volume.(C) cardiac output.(D) heart rate.

A: The pulse of a person is measured by placing one’s finger on the inside wrist of that person. The…

Q: the herbal supplements bitter orange, also known as synephrine, mimics the effects of…

A: The major neurotransmitter of the sympathetic nervous system are the  acetylcholine and…

Q: Baroreflex is a positive feedback mechanism responsible for an increase in heart rate due to a low…

A: Introduction: There are various mechanisms present inside the body to regulate systemic arterial…

Q: The ""lub-dup"" heart sounds are produced by the _______"   A "opening of the atrioventricular…

A: Heart sounds are heard by auscultation using a stethoscope. It is an important aspect of the…

Q: Johanna experiences a hemorrhage in an artery, and now blood is leaking out of the resulting hole.…

A: The blood pressure(BP) refers to the hydrostatic pressure exerted by the blood down the walls of a…

Q: What two effects result when the baroreceptor response to elevated blood pressure (BP) is triggered?

A: The circulatory system is that organ of the body that is responsible for the circulation and…

Q: Epinephrine is released during vigorous exercise. How would epinephrine cause vasoconstriction in…

A: Epinephrine is a hormone which is secreted from the adrenal medulla gland as a fight or flight…

Q: Increased contractility of the heart results in all of the following EXCEPT (A) increased stroke…

A: The contractility of heart is the heart ability to eject a particular stoke volume at given preload…