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Identification:: 4. Ecg Graph

The document discusses the significance of an ECG graph, which records the heart's electrical activities and identifies key waves such as 'P', 'QRS', and 'T'. It also outlines procedures for testing the presence of ammonia and urea in sample solutions using specific reagents. The tests confirm the presence of ammonia through color change and identify urea using phenol red and horse gram powder.

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rabu74
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294 views1 page

Identification:: 4. Ecg Graph

The document discusses the significance of an ECG graph, which records the heart's electrical activities and identifies key waves such as 'P', 'QRS', and 'T'. It also outlines procedures for testing the presence of ammonia and urea in sample solutions using specific reagents. The tests confirm the presence of ammonia through color change and identify urea using phenol red and horse gram powder.

Uploaded by

rabu74
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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4. ECG GRAPH
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Identification: 9HQWULFXODU
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tion is an ECG graph. 3 7

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Significance: 34 67
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• An ECG records the electrical activities of the 6
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heart over a period of time.   


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• The special flap of muscle called the Sino auricular


node in right atrium initiates the heart beat.
• The waves of the ECG are due to depolarization and not due to contraction of the
heart.
• A normal ECG shows 3 waves designated as ‘P’ wave, ‘QRS’ complex and ‘T’wave.

VI. 1. Identify the given sample solution ‘F’ f or the presence/activity of salivary amylase/
ammonia/urea.
2. Observe and write about the given ‘G’ experiment / specimen / picture.
Determine Your Blind Spot / Identify the sex of cockroach

1. TEST FOR AMMONIA

Aim : To test the presence of Ammonia in the given sample solution.


Materials Required: Test tube and holder.
Solution Required: Sample solution and Nessler’s Reagent.
Procedure:
1) Take 2ml of the given sample solution in a clean test tube.
2) Add few drops of Nessler’s reagent in the test tube containing sample solution.
3) Appearance of dark yellow/brown colour confirms the presence of Ammonia
in the given sample.

Inference: It is inferred that ammonia is present in the given solution.

2. TEST FOR UREA

Aim: To test the presence of urea in the given sample solution.


Material Required: Test tube, sample solution, test tube holder and pipette / dropper.
Required Reagents:  Phenol red and Horse gram powder (which contains the
enzyme urease).
292

XI Std Zoology Glossary EM.indd 292 24/12/2021 18:40:15

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