Podcast
Questions and Answers
What is the purpose of the cuticle or bloom on the egg shell?
What is the purpose of the cuticle or bloom on the egg shell?
- To increase the attachment of the shell membrane
- To seal the pores in the shell and prevent excessive evaporation (correct)
- To allow gasses to pass in and out of the egg
- To make the shell less brittle
How many layers does the outer membrane of the egg shell have?
How many layers does the outer membrane of the egg shell have?
- 6 layers (correct)
- 5 layers
- 4 layers
- 3 layers
Which component is NOT part of the composition of the egg shell membrane?
Which component is NOT part of the composition of the egg shell membrane?
- Fibers
- Protein
- Calcium carbonate (correct)
- Polysaccharides
What happens if the cuticle or bloom is removed from an egg shell?
What happens if the cuticle or bloom is removed from an egg shell?
What is the main function of the shell membrane of an egg?
What is the main function of the shell membrane of an egg?
What is the main reason behind the formation of the air layer in an egg?
What is the main reason behind the formation of the air layer in an egg?
What gives strength to the vitelline membrane surrounding the egg yolk?
What gives strength to the vitelline membrane surrounding the egg yolk?
What does the germinal disc in the egg yolk develop into under suitable conditions?
What does the germinal disc in the egg yolk develop into under suitable conditions?
Which part of the egg makes up the largest percentage of its weight?
Which part of the egg makes up the largest percentage of its weight?
What happens when storage conditions impact the thickness of the albumin in an egg?
What happens when storage conditions impact the thickness of the albumin in an egg?
Study Notes
Egg Shell Structure and Function
- The cuticle, or bloom, protects the egg from bacteria and moisture loss, enhancing shelf life.
- The outer membrane of the egg shell consists of two layers: the outer and inner membranes.
- Components not part of the egg shell membrane include the yolk and albumin, which serve different functions.
Effects of Cuticle Removal
- Removal of the cuticle increases vulnerability to bacterial contamination and moisture loss, shortening the egg's freshness.
Shell Membrane Functions
- The primary function of the shell membrane is to provide a barrier against microorganisms and maintain the egg's internal environment.
Air Cell Formation
- The air layer, or air cell, forms due to evaporation of moisture and contributes to gas exchange, crucial for embryo development.
Vitelline Membrane Strength
- The vitelline membrane surrounding the yolk gains strength from proteins and a network of glycoproteins, protecting the yolk contents.
Germinal Disc Development
- Under suitable conditions, the germinal disc in the egg yolk can develop into an embryo, initiating the reproductive cycle.
Weight Composition of the Egg
- The albumin (egg white) accounts for the largest percentage of the egg's weight, contributing to its nutritional value.
Storage Impact on Albumin
- Poor storage conditions can lead to thinning of the albumin, affecting texture and quality, important for culinary applications.
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Description
Learn about the different parts of an egg, including the shell which forms the protective covering. Explore the composition of the shell and its functions in protecting the developing embryo.
