
An ECG measures
a. changes in electrical potential during the cardiac cycle.
b. Ca2+ concentration of the ventricles in diastole.
c. the force of contraction of the atria during systole.
d. the volume of blood being pumped during the contraction cycle.

Introduction:
Heart is the pumping organ of humans. Its function is to pump blood in aorta which is the biggest artery of humans. This artery then subdivides into various different arteries like the superior vena cava inferior vena cava hepatic artery and some others. The pumping of blood is done by the generation of electrical pulse which is generated by the AV node which is also called pacemaker.
Answer to Problem 1U
Correct answer:
An ECG is a procedure that is used to measure the “changes in the electric potential during a cardiac cycle”. Therefore option a. is correct.
Explanation of Solution
Reason for the correct statement:
Electrocardiogram is a device to measure the electrical conductivity of heart. Its values are obtained in the form of a graph which is called electro cardiogram. This graph has four peaks called the P, Q, R, S peaks. These peaks tell about the electrical conductivity of the heart of a person. The highest peak is R and the smallest peak is the S peak.
Option a. is given as “changes in electrical potential during the cardiac cycle”.
As, “an ECG is used to measure the electrical conductivity or potential during a cardiac cycle”, is the correct answer.
Hence, the option a. is correct.
Reasons for the incorrect statements:
Option b. is given as “Ca2+ concentration of the ventricles in a diastole”.
An ECG is used for measuring electrical potential during a cardiac cycle not the Ca2+ concentration of the ventricles in a diastole. So, it is a wrong answer.
Option c. is given as “the force of contraction of the atria during systole"”.
The purpose of an ECG is to measure the electrical conductivity of heart during a cardiac cycle not the force of contraction of the atria during systole". So it is a wrong answer.
Option d. is given as “the volume of blood being pumped during the contraction cycle"”.
The aim an ECG is to measure the electrical conductivity of heart during a cardiac cycle and not the volume of blood being pumped during the contraction cycle". So it is a wrong answer.
Hence, options b., c. and d. are incorrect.
The function of an ECG is to measure the electrical conductivity of the heart. The electrical impulse is generated by pacemaker of the body.
Want to see more full solutions like this?
Chapter 49 Solutions
Biology
- What symbolic and cultural behaviors are evident in the archaeological record and associated with Neandertals and anatomically modern humans in Europe beginning around 35,000 yBP (during the Upper Paleolithic)?arrow_forwardDescribe three cranial and postcranial features of Neanderthals skeletons that are likely adaptation to the cold climates of Upper Pleistocene Europe and explain how they are adaptations to a cold climate.arrow_forwardBiology Questionarrow_forward
- ✓ Details Draw a protein that is embedded in a membrane (a transmembrane protein), label the lipid bilayer and the protein. Identify the areas of the lipid bilayer that are hydrophobic and hydrophilic. Draw a membrane with two transporters: a proton pump transporter that uses ATP to generate a proton gradient, and a second transporter that moves glucose by secondary active transport (cartoon-like is ok). It will be important to show protons moving in the correct direction, and that the transporter that is powered by secondary active transport is logically related to the proton pump.arrow_forwarddrawing chemical structure of ATP. please draw in and label whats asked. Thank you.arrow_forwardOutline the negative feedback loop that allows us to maintain a healthy water concentration in our blood. You may use diagram if you wisharrow_forward
- Give examples of fat soluble and non-fat soluble hormonesarrow_forwardJust click view full document and register so you can see the whole document. how do i access this. following from the previous question; https://www.bartleby.com/questions-and-answers/hi-hi-with-this-unit-assessment-psy4406-tp4-report-assessment-material-case-stydu-ms-alecia-moore.-o/5e09906a-5101-4297-a8f7-49449b0bb5a7. on Google this image comes up and i have signed/ payed for the service and unable to access the full document. are you able to copy and past to this response. please see the screenshot from google page. unfortunality its not allowing me attch the image can you please show me the mathmetic calculation/ workout for the reult sectionarrow_forwardIn tabular form, differentiate between reversible and irreversible cell injury.arrow_forward
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage LearningBiology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
- Fundamentals of Sectional Anatomy: An Imaging App...BiologyISBN:9781133960867Author:Denise L. LazoPublisher:Cengage LearningMedical Terminology for Health Professions, Spira...Health & NutritionISBN:9781305634350Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. SchroederPublisher:Cengage Learning



