Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 49, Problem 2A
Summary Introduction
Introduction:
The human heart is a four-chambered muscular organ that is associated with the circulation of blood throughout the human body. It is a part of the circulatory system that consists of blood vessels (arteries, capillaries, and veins) along with the heart. The heart is located within the ribcage between the lungs, slightly left in position.
The upper two chambers are referred as auricles or atrium, while the lower two chambers are referred as ventricles. Antrio-ventricular valves are present in between atrium and ventricles that separates them from one another. These valves include mitral valve and tricuspid valve. Tricuspid valve is present on the right side, while mitral valve is present on the left side.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A molecule of CO2 that is generated in the cardiac muscle of the left ventricle would not pass through which of the following structures before leaving the body?a. right atriumb. left atriumc. right ventricled. left ventricle
Which of the following is the best description of what happens in capillaries?
A. Capillaries are surrounded by thicker smooth muscle moving blood cells to exchange nutrients and oxygen.
B. Capillaries connect minor veins to major veins returning blood to the heart.
C. Capillaries are the location where oxygen, carbon dioxide, and nutrients are exchanged with tissues at the cellular level.
D. Capillaries are the site where blood mixes with interstitial fluid to allow for gas and nutrient exchange.
Figure 16.10 Which of the following statements about the circulatory system is false?a. Blood in the pulmonary vein is deoxygenated.b. Blood in the inferior vena cava is deoxygenated.c. Blood in the pulmonary artery is deoxygenated.d. Blood in the aorta is oxygenated.
Chapter 49 Solutions
Biology
Ch. 49 - An ECG measures a. changes in electrical potential...Ch. 49 - Systole is vitally important to heart function and...Ch. 49 - Which of the following is the correct sequence of...Ch. 49 - Which of the following statements is not true? a....Ch. 49 - Prob. 5UCh. 49 - Prob. 6UCh. 49 - When a sphygmomanometer is used, a. blood pulses...Ch. 49 - Prob. 8UCh. 49 - In vertebrate hearts, atria contract from the top,...Ch. 49 - Prob. 2A
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
- All of the following mechanisms assist in returning venous blood to the heart except: a. an increase in heart rate b. pressure changes in the abdominal and thoracic cavities due to breathing c. contraction of skeletal muscles in the legs d. one-way valves located inside veinsarrow_forwardWhich is not true about our heart A. ventricular systole squeezes blood to the lungs and the body B. Both ventricles hold the same volume of blood C. The pacemaker is in the right atrium D. blood from the left lung goes to the left atrium and blood from the right lung goes to the right atriumarrow_forwardThe heart’s internal pacemaker beats by: a. an internal implant that sends an electrical impulse through the heart b. the excitation of cardiac muscle cells at the sinoatrial node followed by the atrioventricular node c. the excitation of cardiac muscle cells at the atrioventricular node followed by the sinoatrial node d. the action of the sinusarrow_forward
- which of the following is TRUE for a cardiac cycle? a. it only includes pressure changes that occur during one heart beat b. it refers to volume changes that occur in one heart beat c. it includes mechanical events during one complete heart beat d. it refers to electrical activity of the heart during one complete heart beatarrow_forwardWhich of the following is NOT a population of pacemaker cells in the heart? a. papillary muscles b. sinoatrial (SA) node c. atrioventricular (AV) node d. Purkinje fiber systemarrow_forwardWhich of the following has a correct sequence in cardiac cycle? A. Atrial depolarization → Ventricular diastole → T-wave B. Atrial diastole → Closing of tricuspid valve → Early ventricular diastole C. Ventricular repolarization → Ventricular contraction → P-wave D. Ventricular diastole → Opening of the pulmonic valve → Atrial systolearrow_forward
- This diagram shows a _______ and the green things being released into the space are _____. A. cardiac pace maker cell; calcium B. sarcoplasmic reticulum; calcium C. synapse; Sodium ions D. neuromuscular junction; neurotransmittersarrow_forwardThe blood vessels responsible for variably distributing cardiac output among organs in the body are: a. Veins b. Arteries c. Capillaries d. Arteriolesarrow_forwardWhich of the following statements is correct? a. Arteries carry blood away from the heart and veins carry blood to the heart. b. Arteries carry blood to the heart and veins carry blood away from the heart. C. All arteries carry oxygen-rich blood and veins carry oxygen-poor blood. d. Arteries carry oxygen-poor blood and veins carry oxygen-rich blood.arrow_forward
- The heart chamber that receives oxygenated blood from the lungs of animals with a double circulation is the a. left atrium. b. right ventricle. c. left ventricle. d. right atrium.arrow_forwardWhich of the following structures provides the anchoring site for the valves of the heart and prevents the conduction of electrophysiologic impulses form the atria to the ventricles? A. Chordae Tendineae B. Fibrous Pericardium C. Fibrous Skeleton of the heart D. MyocardiumE. Sinus Venosumarrow_forwardIn terms of being open or closed, what is the state of the mitral and tricuspid valve (left and right atrioventricular valves respectively) at the end of the first heart sound? a. Mitral is closed, Tricuspid is open b. Mitral is open, Tricuspid is closed c. Both are closed d. Both are openarrow_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