HUMAN BIOLOGY: CONCEPTS - 9780134312729
8th Edition
ISBN: 2819260095972
Author: Johnson
Publisher: PERUSALL
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Textbook Question
Chapter 4, Problem 9TY
Which of the following is responsible for skin pigmentation?
a. melanin
b. keratin
c. collagen
d. sebum
e. dermicidin
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Chapter 4 Solutions
HUMAN BIOLOGY: CONCEPTS - 9780134312729
Ch. 4 - Health clinics sometimes cite retrospective...Ch. 4 - How important to you is FDA approval and/or...Ch. 4 - Describe some advantages and disadvantages of...Ch. 4 -
2. Name the four main types of tissues in the...Ch. 4 - Prob. 3CRCh. 4 - Prob. 4CRCh. 4 - List the 11 organ systems of the body and give at...Ch. 4 -
6. Define interstitial fluid.
Ch. 4 - Name the two cavities of the anterior body cavity...Ch. 4 - Prob. 8CR
Ch. 4 - Discuss the purpose of homeostasis in the body.Ch. 4 - Prob. 10CRCh. 4 -
1. Collagen and elastin fibers are typically...Ch. 4 -
2. Cells in cardiac muscle are able to contract...Ch. 4 - Which of the following membranes is not composed...Ch. 4 -
4. Exocrine and endocrine glands are types...Ch. 4 - Prob. 5TYCh. 4 - What property do all muscle tissues have in...Ch. 4 -
7. Injury to bone heals more quickly than injury...Ch. 4 - Which of the following tissues may be found in the...Ch. 4 - Which of the following is responsible for skin...Ch. 4 - Prob. 10TYCh. 4 - Prob. 11TYCh. 4 - Prob. 12TYCh. 4 - A substantial amount of nonliving extracellular...Ch. 4 - Prob. 14TYCh. 4 - Reducing food intake may lead to weight loss by...Ch. 4 -
1. Your roommate says that the concept of...Ch. 4 - What do you think would be some of the problems...Ch. 4 - Sherlock Holmes, the greatest fictional detective...Ch. 4 -
4. Dieting is difficult. People who do manage to...Ch. 4 - Fibrous connective tissue consists of ground...Ch. 4 -
6. By definition, an organ is a structure...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following statements relating to burns is false? a. it is tissue damage caused by extreme heat b. first-degree burns have damage only in the epidermis c. second-degree burns include damage in the upper dermal layer d. third-degree burns exhibit damage in the entire skin thickness e. None of the abovearrow_forwardWhich of the following is not a function of the subcutaneous layer of skin? a. Stores fat that can be used for food b. Helps the body in temperature regulation c. Protects the underlying tissue by acting as a "shock absorber" d. Produces melanin to protect skin from the ultraviolet rays of the sun The lower right abdominopelvic quadrant includes all of the: a. right epigastric region b. right lumbar region c. right iliac region d. right hypochondriac region An important function of the cell membrane is: a. the production of energy b. aiding in protein formation c. acting as an "identification tag" for the cell d. none of the abovearrow_forwardMelanocytes and keratinocytes work together in protecting the skin from UV damage when keratinocytes ________ a.maintain the appropriate pH in order for the melanocyte to synthesize melanin granules. b.provide the melanocyte with nutrients necessary for melanin synthesis. c.maintain the appropriate temperature so the product of the melanocyte will not denature. d.accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer.arrow_forward
- Which of the following is not a function of the skin? a. Synthesis of vitamin C b. Retention of water c. Sensation of pain, temperature, and pressure d. Thermoregulationarrow_forwardA callus may develop when both thin and thick skin are subjected to repeated pressure. Which layer of the epidermis develops the callus? a. stratum spinosum b. stratum corneum c. stratum basale d. stratum lucidumarrow_forwardThe hair follicle is found in the A.epidermis B. Dermis C.Subcutaneous layer D.Hypodermisarrow_forward
- 1. A) A major function of the skin is protection from ______. A. abrasion B. ultraviolet light C. entry of a microorganism D. dehydration E. All of the above B) What is one important function of melanin? A. Resets the diurnal biological clock B. Increases the amount of blood vessels C. Causes the skin to become cooler D. Absorbs harmful radiation E. Strengthens the skin or eyes C) Most of the cells of the epidermis are ________________. A. fibroblasts B. keratinocytes C. macrophages D. Langerhans cells D) The epidermis is nourished by diffusion from capillaries in the ___________. A. papillary layer of the dermis B. hypodermis C. epidermis D. reticular layer of the dermis E) Cell division occurs in which layer of the epidermis? A. Stratum lucidum B. Stratum corneum C. Stratum basale D. Stratum granulosum F) Which of the following is NOT…arrow_forwardHow do melanocytes and keratinocytes work together to protect the skin from UV damage? a. Keratinocytes maintain the proper pH for melanocytes to synthesize melanin granules. b. Keratinocytes provide the melanocyte with nutrients critical for melanin synthesis. c. Keratinocytes maintain the appropriate temperature so the melanin will not denature. d. Keratinocytes accumulate melanin granules to shield the keratinocyte’s DNA.arrow_forwardMark the following statements as true or false. If a statement is false, correct it to make a true statement. a. The primary skin pigment is melanin, which is derived from the amino acid tyrosine. b. Melanin is produced by melanocytes and covers the nuclei of neighboring dendritic cells. c. Carotene is a brown-black pigment that accumulates in the stratum corneum. d. Increased amounts of blood flowing through the dermis lead to pallor in the skin. e. Hemoglobin is a pigment found in red blood cells, and its color depends on the oxygen level of the blood.arrow_forward
- Which of the following statements about melanocytes and keratinocytes is true? a. Melanocytes are in the dermis and keratinocytes are in the epidermis b. Melanocytes produce pigment but keratinocytes do not. c. Both cell types produce waterproofing material. d. Both cell types divide and die as they move away from their blood supply.arrow_forwardWhich of the following statements about epidermal cell types is false? a. Keratinocytes produce the fibrous keratin protein b. Melanocytes produce the pigment melanin c. Langerhans cells produce macrophages d. Merkel cell send information to sensory neurons e. None of the abovearrow_forwardWhich of the following layers of the skin has projections of melanocytes? O A. Stratum basale O B. Stratum granulosum O C. Stratum lucidum O D. Stratum spinosumarrow_forward
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