The differences between serous, mucous, and mixed glands and examples of each. Introduction: A gland is a single cell or organ that contains a collection of secretory epithelial cells. It is formed by epithelial cells in the underlying layer of connective tissues. It has two major functions namely to secrete substance or remove waste from the body. Exocrine gland develops into the duct, which is essential for the secretions. The secretions are released in the form of sweat, mammary, salivary, and tear glands. It is also released from the lumen cavity such as the mouth or intestine.

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In order to establish the expiration date of perishable food, growth curve data must be collected. Once the microbial load is so high that it poses a hazard to human health, the food item is no longer considered safe (expired). Generally a load of x50,000 bacteria/gram is considered unsafe. Your task is to determine the microbial growth curves for MicroYo, a new brand of yogurt. The growth is determined by sampling the yogurt and growing the bacterial isolates in broth culture which is then serially diluted by a total of x10,000 and inoculated onto standard petri plates of nutrient agar. The following colony counts are measured: Time (days) MicroYo colony count# 1 1 4 1 12 2 16 20 4 7 What day should you recommend expiring the yogurt (the last possible date before the microbial load is unsafe). 12 4 20 16

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Chapter 5.5, Problem 8AYLO

Summary Introduction

To discuss:

The differences between serous, mucous, and mixed glands and examples of each.

Introduction:

A gland is a single cell or organ that contains a collection of secretory epithelial cells. It is formed by epithelial cells in the underlying layer of connective tissues. It has two major functions namely to secrete substance or remove waste from the body.

Exocrine gland develops into the duct, which is essential for the secretions. The secretions are released in the form of sweat, mammary, salivary, and tear glands. It is also released from the lumen cavity such as the mouth or intestine.

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In order to establish the expiration date of perishable food, growth curve data must be collected. Once the microbial load is so high that it poses a hazard to human health, the food item is no longer considered safe (expired). Generally a load of x50,000 bacteria/gram is considered unsafe. Your task is to determine the microbial growth curves for MicroYo, a new brand of yogurt. The growth is determined by sampling the yogurt and growing the bacterial isolates in broth culture which is then serially diluted by a total of x10,000 and inoculated onto standard petri plates of nutrient agar. The following colony counts are measured: Time (days) MicroYo colony count# 1 1 4 1 12 2 16 20 4 7 What day should you recommend expiring the yogurt (the last possible date before the microbial load is unsafe). 12 4 20 16

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