Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
expand_more
expand_more
format_list_bulleted
Question
Chapter 33.2, Problem 1CSC
Summary Introduction
To determine:
The structure of normal heart muscle and its contractions that coordinated to circulate blood effectively.
Introduction:
Heart is a muscular organ present in most of the organism. Heart serves as the pump to circulate the blood. The heart has four chambers. The cardiac muscles are of two types’ myocardial contractile cells and myocardial conducting cells.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Tia developed Rheumatic heart disease when she was 19 years old that caused stenosis of her mitral valve. Long-standing mitral stenosis led to left atrial enlargement. She is 29 now and her cardiologist, Dr. Irma Wu, advised her replacement of the mitral valve. According to her doctor, after the valve replacement, she would require life-long blood thinners.
Using your knowledge of physiology, explain how can clot formation be prevented prophylactically?
Knowing ECG. Do you think you can predict atrial enlargement from ECG? Why or why not? Support your answer with reasoning.
The exact cause of blood clotting in the left atrium of the heart during atrial fibrillation (AF) is not known. In part it might be due to blood stasis (not moving) or it may result in combination with endothelial cells damage.
(A) What are the potential mechanisms that might drive clotting and what markers might you look for in the blood to predict potential risk?
(B) Other than treating the arrhythmia, what other pharmacological intervention might be provided to AF sufferers?
Figure shows the conduction system of the heart that transmit the electrical impulses
for the coordination of cardiac cycle.
a) Referring to the Figure , which part of the heart's electrical conduction is known as
the “pacemaker” of the heart?
b)Explain how D controls atria and ventricles which causes ventricular systole.
Chapter 33 Solutions
Biology
Ch. 33.1 - Why doesnt insect hemolymph need hemoglobin?Ch. 33.1 - Prob. 1CYLCh. 33.1 - compare open and closed circulatory systems?Ch. 33.1 - describe the functions of the vertebrate...Ch. 33.2 - Prob. 1CSCCh. 33.2 - Prob. 1TCCh. 33.2 - Prob. 1HYEWCh. 33.2 - describe the three types of vertebrate hearts and...Ch. 33.2 - Prob. 2CYLCh. 33.2 - Prob. 3CYL
Ch. 33.3 - Prob. 1TCCh. 33.3 - Prob. 2TCCh. 33.3 - describe each component of blood and explain its...Ch. 33.3 - Prob. 2CYLCh. 33.3 - explain the sequence of events during blood...Ch. 33.4 - Prob. 1TCCh. 33.4 - Prob. 2TCCh. 33.4 - Prob. 1CYLCh. 33.4 - Prob. 2CYLCh. 33.4 - Prob. 3CYLCh. 33.5 - Prob. 1TCCh. 33.5 - Prob. 1CSCCh. 33.5 - Prob. 1CYLCh. 33.5 - Prob. 2CYLCh. 33.5 - Prob. 3CYLCh. 33 - Prob. 1MCCh. 33 - Which of the following is True? a. Arteriole...Ch. 33 - Prob. 3MCCh. 33 - Prob. 4MCCh. 33 - Which of the following is true of blood pressure?...Ch. 33 - Prob. 1FIBCh. 33 - Prob. 2FIBCh. 33 - The hearts pacemaker is called the (complete term)...Ch. 33 - Prob. 4FIBCh. 33 - Prob. 5FIBCh. 33 - Prob. 6FIBCh. 33 - Lymph is ___________ that has entered lymphatic...Ch. 33 - List the major structures of all circulatory...Ch. 33 - Describe and compare the features of open and...Ch. 33 - Explain how two- and three-chambered vertebrate...Ch. 33 - Prob. 4RQCh. 33 - Prob. 5RQCh. 33 - Prob. 6RQCh. 33 - Prob. 7RQCh. 33 - Prob. 8RQCh. 33 - Describe the cardiac cycle, and relate the...Ch. 33 - Prob. 10RQCh. 33 - Prob. 11RQCh. 33 - Prob. 12RQCh. 33 - In what way do veins and lymphatic vessels...Ch. 33 - Prob. 1ACCh. 33 - Prob. 2AC
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
- VSD, or ventricular septal defect, is a condition that accounts for half of all congenital cardiovascular anomalies. In this condition, a hole exists in the septum, the muscular wall between the ventricles, which allows blood from the right and left side of the heart to mix. What sort of problems might this condition cause?arrow_forwardYou wanted to prepare a fish dish for your grandfather that he loves the dried salted Codfish. But you noticed that this might be causing a problem for your elder grandfather since he has hypertension, what would you do to remove the salt from the fish? (Answer with one word) What is the mechanism by which the salt gets out from the fish? (one word) Please put a comma and space between * the two answers word. Answer:arrow_forwardConsidering the function of the heart, why is it important that the myocardium cannot be tetanized?arrow_forward
- 1) If a heart lacked gap junctions, an organ-level contraction would occur.True/False 2) We care about mean arterial pressure specifically because we care about having an appropriate rate of blood flow through capillaries. True/False 3) A person's L-type channels are mutated so that they do not inactivate. How would this affect the time duration of a cardiac action potential? Group of answer choices a)Increase b)No change c)Decrease 4) A person's L-type channels are mutated so that they do not inactivate. How would this affect the time duration of a cardiac muscle cell contraction? Group of answer choices a)Increase b)No change c)Decreasearrow_forwardLeft Atrium Right Atrium Left Ventricle Right Ventricle b) On the diagram of the heart above, use arrows to show the pathway of blood through the heart and its associated vessels. c) Use a blue colored pencil to shade in all regions of the heart that carry deoxygenated blood and a red colored pencil to shade in the regions that carry oxygenated blood. Conclusion:arrow_forwardThe mother of a three-month-old infant was concerned because her child had little energy and did not seem to be thriving. You examine the child and suspect the presence of a congenital cardiac defect, most likely a patent ductus arteriosus. What other symptoms would accompany this diagnosis? Left-to-right shunting of blood between the atria Notching of the ribs created by dilated intercostal arteries Decreased oxygen in the systemic circulation Distension of the right atrium Increased blood flow in the pulmonary circulationarrow_forward
- 1a) Exercise immediately increases end-diastolic volume.True/False b)Mean arterial pressure is a relevant stimulus for the baroreceptor reflex.True/False c)Which of the following would be the most relevant efferent pathway for the regulation of cardiac output by the hormone epinephrine. (baroreceptor, axon, blood, ventricular cells, AV node, brainstem)arrow_forwardJohn is your 68-year old neighbor who was recently told by his doctor that his heart’s main pacemaker stopped working (“They told me it is called an SA node”). He knows you are a nurse, so he came to you to ask why his heart is still beating, but only at a rate of 50 times per minute. Please explain using appropriate physiological and anatomical details.arrow_forward1)An increase in total peripheral resistance, all else remaining the same, will cause an increase in mean arterial pressure.True/False 2) We care about mean arterial pressure specifically because we care about having an appropriate rate of blood flow through capillaries. True/False 3) A person's L-type channels are mutated so that they do not inactivate. How would this affect the time duration of a cardiac action potential? Group of answer choices a)Increase b)No change c)Decrease 4) A person' L-type channels are mutated so that they do not inactivate. How would this affect the time duration of a cardiac muscle cell contraction? Group of answer choices a)Increase b)No change c)Decreasearrow_forward
- Put these types of blood vessels in order BEGINNING ((1) where blood leaves the left side of the heart) and ENDS (6) where blood returns to the right side of the heart). 1 [ Choose] [Choose] veins Arterioles systemic capillaries venules Muscle arteries Elastic arteries 4. [ Choose ] [ Choose ] [ Choose ] F5 F7 F8 F9 F10 F11 F12 PrtSc Pause Delarrow_forwardSelect the TRUE statement/s: During the isovolumetric contraction phase in the cardiac cycle, OA) the SL valves are open O B) the intraventricular pressure is increasing O C) the intraventricular volume does not change OD) Both A and C OE) Both B and Carrow_forwardThe aorta is the principal blood vessel through which blood leaves the heart in order to circulate around the body. (a) Calculate the average speed of the blood in the aorta if the flow rate is 5.0 L/min. The aorta has a radius of 10 mm. (b) Blood also flows through smaller blood vessels known as capillaries. When the rate of blood flow in the aorta is 5.0 L/min, the speed of blood in the capillaries is about 0.33 mm/s. Given that the average diameter of a capillary is 8.0 μm (1 μm = 1 X 10 –6 m), calculate the number of capillaries in the blood circulatory system.arrow_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 Cardiovascular System: An Overview; Author: Strong Medicine;https://www.youtube.com/watch?v=Wu18mpI_62s;License: Standard youtube license