What is Life? A Guide to Biology with Physiology
3rd Edition
ISBN: 9781464157745
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 26, Problem 1MC
Summary Introduction
Introduction:
The integumentary system consists of the physical barriers, their secretions and their appendages, that prevent the entry of pathogens.
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What is Life? A Guide to Biology with Physiology
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- Please send me answer of this question immediately and i will give you like sure sirarrow_forwardAs individuals age, the number of collagen fibers that are found in the dermis of the skin decreases. What are the results of decreased collagen fibers in the dermis? Select all that apply. A The skin loses firmness and becomes wrinkled B The skin develops necrosis and slowly begins to die. C The inflammation levels in the skin increase drastically. The wound healing process in the skin is slower.arrow_forwardMark the following statements as true or false. If a statement is false, correct it to make a true statement.a. Melanocytes account for the bulk of the epidermis. b. Keratinocytes begin life in the stratum corneum and gradually are pushed into the stratum basale. c. Dendritic cells are phagocytes of the immune system that protect the skin and deeper tissues from invasion by pathogens. d. Merkel cells produce the pigment melaninarrow_forward
- All of the following interfere with microbialinvasion of the body excepta. the acid mantle.b. melanization.c. dendritic cells.d. keratinization.e. sebum.arrow_forwardAfter a skin injury, the body initiates a wound-healingresponse. The first step of this response is the formation ofa blood clot to stop bleeding. Which of the following wouldbe the next response?a. increased production of melanin by melanocytesb. increased production of connective tissuec. an increase in Pacinian corpuscles around thewoundd. an increased activity in the stratum lucidumarrow_forwardLabelarrow_forward
- Which one of the following is NOT a function of the integumentary system? a. Regulation of body temperature by controlling blood flow b. Protection against abrasion and UV light c. Excretion of small amounts of waste products d. Vitamin A production with exposure to UV light Detection of heat, cold, pressure, and pain sensationsarrow_forward1. 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_forwardWhy would collagen and elastin added to skin creams be unlikely to penetrate the skin—as some advertisements imply they do? HINT Think about the features of the skin that make it a good physical barrier.arrow_forward
- 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_forwardThe function of melanin in the skin is toa. lubricate the skin.b. prevent skin infections.c. protect the skin from ultraviolet light.d. reduce water loss.e. help regulate body temperaturearrow_forwardUltraviolet (UV) radiation is known to damage skin. UVA wavelengths are able to reach the dermis, whereas UVB wavelengths are only able to penetrate the epidermis. Excessive exposure can cause enough damage to stimulate acute inflammation (sunburn). Histamine secretion initiates the inflammation. Select the TWO that are likely to be true: O vitamin D activation will decline O blood flow to the affected area will increase O UVB activates Pascinian corpuscles O UVB activates mast cells O UVA activates mast cells O blood flow to the affected area will decreasearrow_forward
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The Integumentary System, Part 1 - Skin Deep: Crash Course Anatomy & Physiology #6; Author: CrashCourse;https://www.youtube.com/watch?v=Orumw-PyNjw;License: Standard youtube license