Textbook Question
Sebaceous glands secrete by____ secretion; sweat glands secrete by____ secretion.
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5. Integumentary System
Glands
1:55 minutesProblem 9
Textbook Question
The product of this type of sweat gland includes protein and lipid substances that become odoriferous as a result of bacterial action:
a. Apocrine gland
b. Eccrine gland
c. Sebaceous gland
d. Pancreatic gland
Verified step by step guidance1
Step 1: Understand the function of each gland listed in the options. Apocrine glands are specialized sweat glands that secrete a thicker fluid containing proteins and lipids, which can become odoriferous due to bacterial action. Eccrine glands primarily produce watery sweat for thermoregulation. Sebaceous glands secrete sebum, an oily substance, to lubricate the skin and hair. Pancreatic glands are involved in digestive enzyme secretion and are not related to sweat production.
Step 2: Focus on the key terms in the question: 'sweat gland,' 'protein and lipid substances,' and 'odoriferous due to bacterial action.' These clues point to a gland associated with sweat production and bacterial interaction.
Step 3: Eliminate options that do not match the description. Eccrine glands produce watery sweat without proteins or lipids, so they do not fit. Sebaceous glands produce oil, not sweat, and pancreatic glands are unrelated to sweat production.
Step 4: Recall that apocrine glands are found in areas like the armpits and groin, and their secretions contain proteins and lipids. These secretions can become odoriferous when bacteria break them down, matching the description in the question.
Step 5: Based on the analysis, the correct answer is the apocrine gland. This gland fits all the criteria described in the problem.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Apocrine Gland
Apocrine glands are a type of sweat gland primarily found in areas such as the armpits and groin. They secrete a thicker fluid that contains proteins and lipids, which can become odoriferous when broken down by bacteria on the skin's surface. This process is responsible for body odor, distinguishing apocrine glands from other sweat glands.
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Eccrine Gland
Eccrine glands are the most common type of sweat gland, found all over the body, particularly on the palms, soles, and forehead. They produce a watery, odorless sweat primarily composed of water and salts, which helps regulate body temperature through evaporation. Unlike apocrine glands, eccrine secretions do not contribute to body odor.
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Sebaceous Gland
Sebaceous glands are associated with hair follicles and secrete an oily substance called sebum, which helps to lubricate and protect the skin and hair. While they play a crucial role in skin health, they do not produce sweat and are not involved in the odoriferous processes associated with sweat glands.
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