When you are cold, your blood vessels contract. However, your heart rate and blood pressure increases. Explain. What is the physiological function of increasing heart rate?

Q: Why is the gap junctions between heart muscle cells play a relevant role in producing a regular…

A: Only the heart contains cardiac muscle tissue. Cardiac muscle contractions are well-coordinated,…

Q: The ____________ nerves innervate the heart and tend to reduce the heart rate.

A: The heart is the most important organ for the body and made up of several different types of tissues…

Q: A chemical called EDTA, like citrate, binds to (or “chelates”) Ca2+. Suppose a person had EDTA…

A: Blood circulates under pressure through the vasculature. Following vascular injury, escaping blood…

Q: Ventricular Contractility increases in response to circulating Epinephrine.  What factor is…

A: The heart is one of the vital organs of a human body. It is responsible for pumping blood through…

Q: Why would a wide pulse pressure be logical to give a patient with the condition aortic…

A: Aortic regurgitation is referred aortic valves that fails to close completely and there is the…

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: Predict, with reason, one change in blood flow that would occur if the person were moved to a cold…

A: The circulatory system consists of the heart, the blood vessels and the blood. The function of the…

Q: Why does blood pressure decrease from arteries to veins

A: The blood vessels are tubular carriers of blood in our body. They carry oxygenated blood from our…

Q: Describe the Flank-Starling law in the heart.

A:

Q: Describe the control processes that interact to regulate blood flow and pressure in tissues, and…

A: Blood flows in the body through blood vessels that form the cardiovascular system with the heart.…

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: Imagine that you are feeling very anxious as you walk to the podium to deliver a speech. If your…

A: Ans: Cardiac output: The cardiac out put is the amount of blood pumped by heart to different organs…

Q: Inflammation of the pericardium can lead to a condition called pericardial effusion, in which fluids…

A: The heart is a conical hollow organ which consists of four chambers. Two auricles and two ventricles…

Q: Explain how the baroreceptor reflex helps to compensate for a fall in blood pressure. Why will a…

A: The baroreceptor reflex, propitiated by the autonomic nervous system (ANS) joining the heart and…

Q: Explain the origin and conduction of the excitation that leads to a heart contraction. Why is the…

A: Since, there are multiple questions. I have answered the first question only. If you need the…

Q: raw a ventricular muscle cell action potential in the figure below. Briefly describe the changes in…

A: Similar to skeletal muscle, the resting membrane potential of ventricular cells, is around -90…

Q: Describe cardiac output, including the factors involved in its regulation.

A: Our heart can likewise expand its stroke volume by pumping powerfully & expanding the amount of…

Q: The death of cardiac tissue from lack of blood flow is commonly known as a heart attack, but…

A: Every muscle and tissue of our body needs oxygen for its survival, so as your heart muscles. A heart…

Q: the human heart rate increases when the person is scared?

A: The heart rate of human adults in resting-state ranges from 60 beats to 100 beats per minute.…

Q: Define the term homeostasis. Define the term set point. Explain how a normal range of values for…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…

Q: PREDICT THE EFFECTS OF A DRUG THAT BLOCKS THE SYMPATHETIC NERVOUS SYSTEM ON BLOOD PRESSURE AND HEART…

A: Sympathetic nervous system regulates many homeostatic mechanisms and are well known for…

Q: They carry oxeganated blood away from the heart,while capillaries?

A: Blood vessels referred to as the tubular channels from which blood get transported all over the…

Q: An animal has a pulse that must be triggered by the brain. What type of pulse does this animal have?

A: A brain is an organ that is a part of the nervous system that fills in as the focal point of the…

Q: Describe why your heart rate increases with exercise. What would happen if your heart did not beat…

A: The heart is a muscular organ that pumps blood throughout the body. It is located in the middle…

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: Considering the function of the heart, why is it important that the myocardium cannot be tetanized?

A: Tetanized state is a sustained muscle contraction. This happens because muscle’s motor unit is…

Q: The entry of calcium into a ventricular muscle cell helps to maintain depolarization of the membrane…

A: A well-working conduction system generates a depolarization wave, which causes the atria and…

Q: During rest, an adult's heart rate averages 60-100 beats per minute. When exercising, an adult's…

A: Heart is the pumping organ of our body which pumps blood to the entire body. At resting condition,…

Q: What kind of catabolism occurs in the heart?

A: The heart pumps blood through a system of blood vessels, called the circulatory system. The heart…

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: Describe why a wide pulse pressure would be logical to give a patient with the condition aortic…

A: Pulse pressure is the difference between systolic blood pressure, which is the top number of…

Q: The role of calcium currents in cardiac contractile cells is to .  The role of calcium currents in…

A: A neuromuscular junction is a biochemical synapse between muscle fiber and a motor neuron. It…

Q: Fill in the blank:  A pulse that feels full and is not easily compressed is produced by an elevated…

A: Blood pressure:   Heart pump blood which moves all around the body and provides oxygen and…

Q: A drop in blood pH causes an increase in heart rate.What is the function of this control mechanism?

A: The pH of blood is 7.4. When pH of blood changes, it may lead to acidosis and alkalosis. The buffer…

Q: If 2 liters of blood were injected into a normal human body, what influence would this injection…

A: Cardiovascular result, communicated in liters/minute, is how much blood the heart siphons in 1…

Q: Knowing that a patient with chronic heart failure is using digoxin (digitalis) for more than 1 year,…

A: Digoxin is a medication that is commonly used to treat a variety of different heart conditions, such…

Q: Fill in the blank:  Endings of sympathetic nerve fibers secrete _______________________, which…

A: Nervous system coordinates and controls the activities of the animals such as perceptions, behaviors…

Q: How can an individual’s maximum heart rate be estimated explain with a formula?

A: Heart rate is defined as the number of heartbeats per minute. A normal resting heart rate for adults…

Q: What type of cardiac rhythm is this??

A: Electrocardiogram (ECG): This is a simple test. this test can be used to check: -Heart's rhythm…

Q: You wanted to prepare a fish dish for your grandfather that he loves the dried salted Codfish. But…

A: Osmosis is the process where the solvent(water) moves towared a higher concerntration of solute…

Q: Role cardioregulatory centers play in regulating heart rate

A: Cardio regulatory center is a part of brain that found in the medulla oblongata. It is responsible…

Q: Pressure changes that occur during the cardiac cycle are responsible for what two physiologic…

A: The cardiac cycle is the time interval between atria contraction and ventricular relaxation. Fluids,…

Q: When you have a blockage of blood flow to the heart, it will likely result in what...?

A: Heart block is an abnormal heart rhythm where the heart beats too slowly,which results in the…

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.