SEELEY'S ANATOMY+PHYSIOLOGY
12th Edition
ISBN: 9781260172195
Author: VanPutte
Publisher: RENT MCG
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 20, Problem 6CT
Summary Introduction
To determine:
The reason that the athlete’s resting heart rate decreases instead of increasing.
Introduction:
Endurance athletes generally have a lower resting heart rate as compared to the nonathletes. The heart can be measured in beats per minute. The range of average resting is 60 to 80 beats per minute.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Describe the main theories for the termination of calcium sparks in the cardiac muscle excitation contraction-coupling process
Use the Karvonen formula to calculate the target heart rate at 65% intensity for a 70-year-old client who has a resting heart rate of 80 beats per minute. Discuss why it is important to be able to accurately predict training and maximum heart rates for your clients.
Many endurance-trained athletes have a decreased resting heart rate,compared with that of nonathletes. Explain why an endurance-trainedathlete’s resting heart rate decreases rather than increases.
Chapter 20 Solutions
SEELEY'S ANATOMY+PHYSIOLOGY
Ch. 20.1 - State the four functions of the heart.Ch. 20.2 - What is the approximate size and shape of the...Ch. 20.2 - Where is the heart located? How does this...Ch. 20.3 - Describe the parts of the pericardium and their...Ch. 20.3 - Describe the three layers of the heart wall, and...Ch. 20.3 - Name the chambers of the heart, and describe their...Ch. 20.3 - List the major blood vessels that enter and leave...Ch. 20.3 - Prob. 8AYPCh. 20.3 - Prob. 9AYPCh. 20.3 - Prob. 10AYP
Ch. 20.3 - Describe the openings of the right and left atria....Ch. 20.3 - Prob. 12AYPCh. 20.3 - Prob. 13AYPCh. 20.3 - Prob. 14AYPCh. 20.4 - Prob. 15AYPCh. 20.5 - Prob. 16AYPCh. 20.5 - Prob. 17AYPCh. 20.5 - Prob. 18AYPCh. 20.5 - Prob. 19AYPCh. 20.5 - Identify the parts of the conducting system of...Ch. 20.5 - Prob. 21AYPCh. 20.5 - Prob. 22AYPCh. 20.6 - Prob. 23AYPCh. 20.6 - Prob. 24AYPCh. 20.6 - Prob. 25AYPCh. 20.6 - Prob. 26AYPCh. 20.6 - What does an ECG measure? Nome the waves...Ch. 20.7 - Define systole and diastole.Ch. 20.7 - List the five periods of the cardiac cycle (see...Ch. 20.7 - Define isovolumetric. When does most ventricular...Ch. 20.7 - Prob. 31AYPCh. 20.7 - Prob. 32AYPCh. 20.7 - Prob. 33AYPCh. 20.8 - Prob. 34AYPCh. 20.8 - Explain the role of MAP in causing blood flow.Ch. 20.8 - Prob. 36AYPCh. 20.8 - Prob. 37AYPCh. 20.8 - Prob. 38AYPCh. 20.9 - Prob. 39AYPCh. 20.9 - Prob. 40AYPCh. 20.9 - Prob. 41AYPCh. 20.9 - Prob. 42AYPCh. 20.9 - Prob. 43AYPCh. 20.10 - Prob. 44AYPCh. 20.10 - Prob. 45AYPCh. 20.10 - What effect does an increase or a decrease...Ch. 20.10 - Prob. 47AYPCh. 20.11 - Prob. 48AYPCh. 20.11 - Prob. 49AYPCh. 20.11 - Prob. 50AYPCh. 20.11 - Prob. 51AYPCh. 20 - Which of these structures returns blood to the...Ch. 20 - Prob. 2RACCh. 20 - Prob. 3RACCh. 20 - Prob. 4RACCh. 20 - Prob. 5RACCh. 20 - Prob. 6RACCh. 20 - Action potentials pass from one cardiac muscle...Ch. 20 - During the transmission of action potentials...Ch. 20 - Given these structures of the conducting system of...Ch. 20 - Prob. 10RACCh. 20 - Prob. 11RACCh. 20 - The greatest amount of ventricular filling occurs...Ch. 20 - Prob. 13RACCh. 20 - Prob. 14RACCh. 20 - Prob. 15RACCh. 20 - Cardiac output is defined as blood pressure times...Ch. 20 - Pressure in the aorta is at its lowest a. at the...Ch. 20 - Prob. 18RACCh. 20 - Prob. 19RACCh. 20 - Prob. 20RACCh. 20 - Prob. 21RACCh. 20 - Increased parasympathetic stimulation of the heart...Ch. 20 - Prob. 23RACCh. 20 - Prob. 24RACCh. 20 - Prob. 25RACCh. 20 - Prob. 1CTCh. 20 - In most tissues, peak blood flow occurs during...Ch. 20 - Prob. 3CTCh. 20 - Prob. 4CTCh. 20 - A patient has tachycardia. Would you recommended a...Ch. 20 - Prob. 6CTCh. 20 - A doctor lets you listen to a patient's heart with...Ch. 20 - Explain why it is sufficient to replace the...Ch. 20 - Prob. 9CTCh. 20 - Prob. 10CTCh. 20 - Prob. 11CT
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Unlike skeletal muscle, cardiac muscle doesn’t undergo tetany. Explain how this is achieved and why is this necessary?arrow_forwardWhich ONE of the following statements is TRUE? OA Cardiac myocyte contraction results primarily from an increased concentration of intracellular Na OB Prazosin is an agonist at a2 adrenergic receptors OC Veins can accommodate large volumes of blood but this causes a large increase in pressure OD The pulse pressure is the addition of systolic and diastolic pressure OE The primary integrating centre for baroreceptor reflexes is the medullary cardiovascular centrearrow_forwardIn conditioned athletes, the resting Heart Rate is generally much lower than in non-athletes. Why? a-because long-term exercise reduces Cardiac Output at rest to conserve energy b-because athletes have a smaller Stroke Volume at rest, causing Heart Rate to decrease as well c-because long-term exercise leads to increased vagal tone which slows Heart Rate d-because athletes have stronger ventricles and therefore a larger Stroke Volume at rest, so they require fewer bpm to achieve the same Cardiac Outputarrow_forward
- Caffeine lowers the heart rate by increasing rates of depolarization at the SA node True False Nicotine raises the heart rate because it stimulates the activity of the sympathetic neurons in medulla oblongata True False The Frank-Starling Law of the Heart states that the force of heart contraction is directly proportional to the initial length of the muscle fiber, within optimal limits of length True False If the sarcomeres stretched beyond the optimal length, the force of contraction would go down, but that can potentially happen only during open heart surgery when the heart is not constrained by the pericardium, lungs, ribs and diaphragm. True False It is the Na+ channel-driven spontaneous depolarization that is affected by sympathetic and parasympathetic inputs to speed up or slow down the firing rate of the SA node and other conductive cells. True Falsearrow_forwardAfter exercising many of you saw an INCREASE in the amplitude of the pulse transducer suggesting vasodilation in the musculature AND an increase in heart rate. Which of the following combinations or regulatory factors explains this curious (but common) combination of physiological responses. Sympathetic NS increases vasodilation and increases heart rate Parasympathetic NS increases vasodilation and increases heart rate Parasympathetic NS increases vasodilation and sympathetic NS increases heart rate Local paracrine factors increase vasodilation and Frank-Starling effect increases heart rate Local paracrine factors increase vasodilation and Sympathetic NS increases heart ratearrow_forwardDescribe the effect of exercise on cardiac outputarrow_forward
- Autorhythmic cells in the SA node intrinsically fire at a rate of - 90 action potentials per minute. At rest, the heart rate is lowered primarily through modulation by: O Decreased delivery of acetylcholine and increased delivery of norepinephrine Increased delivery of acetylcholine and decreased delivery of norepinephrine Cardiac contractile cells Decreased delivery of acetylcholine and decreased delivery of norepinephrine Increased delivery of acetylcholine and increased delivery of norepinephrine O O Oarrow_forwardA patient has tachycardia. Would you recommend a drug that prolongsor shortens the plateau of cardiac muscle cell action potentials?arrow_forwardFibrillation is abnormal, rapid contractions of different parts of the heartthat prevent the heart muscle from contracting as a single unit. Explainwhy atrial fibrillation does not immediately cause death but ventricularfibrillation does.arrow_forward
- Exercise-induced stress increases cardiac output and vasoconstriction, so why does the amplitude of the pulse change the way it does (compare this to what happens during the dive response)?arrow_forwardA Zumba instructor remembers the data given in the following table, which shows the recommended maximum exercise heart rates for individuals of the given ages. Age (x years) 20 40 60Maximum heart rate 170 153 136(y beats per minute) d. Use the equation from part c to predict the maximum exercise heart rate for a person who is 72.e. Is the procedure in part d an example of interpolation or extrapolation?arrow_forwardUsing the new cardiovascular drug Entresto, relate how the Cardiac action potential arriving at the surface of the sarcolema results in the mobilisation of intracellular calcium and subsequent cellular contraction. List the references used to get the answerarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning
The Sensorimotor System and Human Reflexes; Author: Professor Dave Explains;https://www.youtube.com/watch?v=M0PEXquyhA4;License: Standard youtube license