BIOLOGY VOL. II
16th Edition
ISBN: 9781308795317
Author: Raven
Publisher: Mcgraw-Hill/Create
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Chapter 49, Problem 4S
Summary Introduction
To determine:
The clinical symptoms that indicate that a person requires surgical implantation of mechanical pacemaker.
Introduction:
The heart’s natural pacemaker is the SA (sinoatrial) node. It is also known as the sinus node. The work of SA node is to generate electrical impulses of the heart. It is a major part of cardiac conduction system and helps to control the heart rate. It consists of cells that are located in the upper part of the right atrium wall.
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After you feel comfortable with your counting method and identifying cells in the various stages of mitosis, use the four images below of whitefish blastula to count the cells in each stage until you reach 100 total cells, recording your data below in Data Table 1. (You may not need to use all four images. Stop counting when you reach 100 total cells.)
After totaling the cells in each stage, calculate the percent of cells in each stage. (Divide total of stage by overall total of 100 and then multiply by 100 to obtain percentage.)
Data Table 1Stage Totals PercentInterphase Mitosis: Prophase Metaphase Anaphase Telophase Cytokinesis Totals 100 100%
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Chapter 49 Solutions
BIOLOGY VOL. II
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
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