Anatomy & Physiology: An Integrative Approach
Anatomy & Physiology: An Integrative Approach
2nd Edition
ISBN: 9780078024283
Author: Michael McKinley Dr., Valerie O'Loughlin, Theresa Bidle
Publisher: McGraw-Hill Education
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Chapter 6, Problem 1DYKB

_____1. Which statement is false about sebaceous glands?

  1. a. They release their secretion onto a hair follicle.
  2. b. They release their product by apocrine secretion.
  3. c. They are located in the dermis.
  4. d. The product they secrete acts as a lubricant and waterproofer.
Expert Solution & Answer
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Summary Introduction

Introduction:

Sebaceous glands are also called holocrine glands as they secrete oily, waxy secretion called sebum. It acts as a lubricant and prevents skin and hair from becoming dry, brittle and cracked.

Answer to Problem 1DYKB

Correct answer:

Sebaceous gland releases their product by apocrine gland is a false statement. Therefore, option b. is correct.

Explanation of Solution

Reason for the correct statement:

Option b. is given as “they release their product by apocrine gland”. The sebaceous gland releases their secretion by the holocrine gland. It secretes waxy, oily secretion called sebum in hair follicles and onto hair. Sebum acts as a lubricant that helps to lubricate the skin and hair. It prevents skin and hair from becoming dry and brittle. It is stimulated by androgen hormone in male and female during puberty.

Hence, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “They release their secretion onto hair follicles”. The sebaceous gland secretes sebum which is oily and waxy substances present on hair follicles. Hence, option a. is incorrect

Option c. is given as “They are located in the dermis”. The sebaceous glands are located in the dermis of skin as it contains connective tissues, blood vessels, oil and sweat glands. Hence, option c. is incorrect.

Option d. is given as “The product they secrete act as lubricant and waterproofer”. The sebaceous gland secretes sebum which is an oily and waxy substance that acts as a lubricant and is waterproof due to its waxy nature. Hence, option d. is incorrect.

Hence, options a., c., and d. are incorrect.

Conclusion

The sebaceous gland is a holocrine gland that secretes an oily and waxy substance called sebum that acts as a lubricant for skin and hair.

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For short answer questions, write your answers on the line provided. To the right is the mRNA codon table to use as needed throughout the exam. First letter U บบบ U CA UUCPhe UUA UCU Phe UCC UUG Leu CUU UAU. G U UAC TV UGCys UAA Stop UGA Stop A UAG Stop UGG Trp Ser UCA UCG CCU] 0 CUC CUA CCC CAC CAU His CGU CGC Leu Pro CCA CAA Gin CGA Arg CUG CCG CAG CGG AUU ACU AAU T AUC lle A 1 ACC Thr AUA ACA AUG Mot ACG AGG Arg GUU GCU GUC GCC G Val Ala GAC Asp GGU GGC GUA GUG GCA GCG GAA GGA Gly Glu GAGJ GGG AACASH AGU Ser AAA1 AAG Lys GAU AGA CAL CALUCAO CAO G Third letter 1. (+7) Use the table below to answer the questions; use the codon table above to assist you. The promoter sequence of DNA is on the LEFT. You do not need to fill in the entire table. Assume we are in the middle of a gene sequence (no need to find a start codon). DNA 1 DNA 2 mRNA tRNA Polypeptide C Val G C. T A C a. On which strand of DNA is the template strand (DNA 1 or 2)?_ b. On which side of the mRNA is the 5' end (left or…
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4. (6 pts) Use the molecule below to answer these questions and identify the side chains and ends. Please use tidy boxes to indicate parts and write the letter labels within that box. a. How many monomer subunits are shown? b. Box a Polar but non-ionizable side chain and label P c. Box a Basic Polar side chain and label BP d. Box the carboxyl group at the end of the polypeptide and label with letter C (C-terminus) H H OHHO H H 0 HHO H-N-CC-N-C-C N-C-C-N-GC-OH I H-C-H CH2 CH2 CH2 H3C-C+H CH2 CH2 OH CH CH₂ C=O OH CH2 NH2

Chapter 6 Solutions

Anatomy & Physiology: An Integrative Approach

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