Preview

unit 4 study guide

Powerful Essays
Open Document
Open Document
1108 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
unit 4 study guide
1. What is the integumentary system and its primary characteristics?
System that contains hair, skin, and oils. It covers the whole body, is 7% of weight, and is very thin.
2. Describe and give at least one example of each of the functions of the integumentary system.
Protection- different barriers to keep pathogens out. Ex- sebum
Body temperature regulation- helps with homeostasis. Ex- production of sweat
Sensory- receptors in the skin detect different things. Ex- nerve endings detect pain
Metabolic function- chemical conversions and production of vitamins. Ex- vitamin D
Blood reservoir- constriction and dilation of blood vessels. Ex-blood vessels
Excretion- elimination of different substances. Ex- salt and water
3. Differentiate between chemical, physical/mechanical and biological barriers provided by the integumentary system. Be sure to provide a minimum of one example for each.
Chemical Barriers (skin secretion and melanin)
Physical/Mechanical Barriers – continuity of the skin and hardness of keratinized cells Biological Barriers – Langerhans’ cells, macrophages, and DNA
4. Create a chart that helps you differentiate the epidermis and dermis. Be sure to include things such as cell composition, cell populations and layers.
A. Epidermis
Composed of epithelial tissue (keratinized stratified squamous)
Cell population:
-Keratinocytes (majority) – produce keratin
-Melanocytes – synthesize melanin .
-Langerhans’ cells (aka epidermal dendritic cells) – macrophages
- Merkel cells – sensory reception
Subdivided into four or five distinct layers
- Stratum basale (aka, stratum germinativum) – deepest layer
-Stratum spinosum
-Stratum granulosum
-Stratum lucidum (thick skin only)
-Stratum corneum – outermost layer
B. Dermis
Composed of fibrous connective tissue
Cell populations
- Fibroblasts producing a semi-fluid
5. Order the layers of the epidermis from outermost to deepest.
STRATUM CORNEUM
STRATUM LUCIDUM
STRATUM GRANULOSUM
STRATUM

You May Also Find These Documents Helpful

  • Satisfactory Essays

    Pt1420 Unit 2 Study Guide

    • 296 Words
    • 2 Pages

    1. A:The three types of a nucleotide are Deoxyribose sugar, Phosphate, and a Nitrogen Containing base.…

    • 296 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    Study Guide for Unit 1 Exam

    • 2853 Words
    • 12 Pages

    1) Kidneys – The left kidney is higher than the right kidney due to the position of the liver. Filters waste products of metabolism that collect in the blood. They remove waste from the blood to form urine. The kidneys maintain balance between retention and excretion of fluids ( play key role in fluid and electrolyte balance). The normal adult urine output is 1200 to 1500 ml/ day. An output less than 30 ml/hr indicates possible circulatory, blood volume or renal alterations. Erythropoietin functions within the bone marrow to stimulate RBC production and maturation. Patients with chronic kidney conditions cannot produce sufficient quantities of this hormone are prone to anemia. The kidneys affect calcium and phosphate regulation by producing a substance that converts vitamin D. Patients with chronic alteration in the kidney fuction do not make sufficient amounts of the active vitamin D. They are prone to develop renal bone disease resulting from impaired calcium absorption. Renal hormones affect blood pressure regulation, renal ischemia (decreased blood supply), and renin is released from juxtaglomerular cells. Renin functions as an enzyme to convert angiotensinogen (a substance synthesized by the liver) into angiotension1. Angiotensin 1 is converted to angiotensin 2 in the lungs. Angiotensin 2 causes vasoconstriction and stimulates aldosterone released from the adrenal cortex. Aldosterone causes retention of water, which increases blood volume. The kidneys also produce prostaglandin E2 and prostacyclin, which help maintain renal blood flow through vasodilation. These mechanisms increase arterial blood pressure and renal blood flow.…

    • 2853 Words
    • 12 Pages
    Powerful Essays
  • Good Essays

    Chapter 4 Study Guide

    • 560 Words
    • 4 Pages

    Channel Proteins: pass molecules through; contain channel down middle. – ions and small polar molecules.…

    • 560 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Pt1420 Unit 2 Study Guide

    • 1286 Words
    • 6 Pages

    (c) A student is completing a project for submission to the Geography department about rainfall in their area.…

    • 1286 Words
    • 6 Pages
    Good Essays
  • Good Essays

    Pt1420 Unit 9 Study Guide

    • 2622 Words
    • 11 Pages

    You are advised to read carefully the following instructions and the ‘Notice to candidates printed on the verso of your timetable.…

    • 2622 Words
    • 11 Pages
    Good Essays
  • Good Essays

    Pt1420 Unit 2 Study Guide

    • 460 Words
    • 2 Pages

    An imperative sentence gives a command or makes a request. It ends with a full stop…

    • 460 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    unit 13 study guide

    • 292 Words
    • 2 Pages

    12. List the function and location of the following structures: sclera, cornea, choroid, ciliary body, iris, lens, retina and pupil.…

    • 292 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Pt1420 Unit 4 Study Guide

    • 646 Words
    • 3 Pages

    Throughout the course of United States History, both parties would evolve from having clearly defined ideals to those which overlap as the socio-political landscape of America has grown in complexity prompting ambiguity of what being a Democrat or a Republican even means.…

    • 646 Words
    • 3 Pages
    Good Essays
  • Good Essays

    What force is responsible for the movement of substances through the filter paper? The filtration by the fiter paper is done by the volume and the surface…

    • 661 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Advantages of using sub-dermal implants such as the contraceptive rod are, It is highly effective, it lasts a long time (up to three years), it is reversible and the return to fertility is rapid, it does not require women to remember to take a pill. Some disadvantages for the contraceptive sub dermal implant are that it doesn’t protect the woman from sexually transmitted infections, and that it requires a minor procedure for insertion and removal of the ‘rod’.…

    • 687 Words
    • 3 Pages
    Satisfactory Essays
  • Powerful Essays

    unit 6 study guide

    • 423 Words
    • 3 Pages

    The Unit 6 Exam consists of a set of 20 multiple-choice questions. The questions for this Exam are based on Units 3–6, which focused on the POLC Model of Management as covered in the Bateman and Snell text (planning, organizing, leading, and controlling). There are 5 items for each of the four functions. You will be able to enter this Exam only once. There is a 2-hour time limit for this type of Exam. Make sure to complete the exam by the end of Unit 6 on Tuesday evening.…

    • 423 Words
    • 3 Pages
    Powerful Essays
  • Satisfactory Essays

    Skin and Layer

    • 254 Words
    • 2 Pages

    3. Name the three layers of the skin and give a brief description of each layer.…

    • 254 Words
    • 2 Pages
    Satisfactory Essays
  • Best Essays

    During this experiment we planned to compare and contrast human cheek cells of a variety of age groups, different stages of skin, and difference in species. We wanted to see if age could correlate to cell structure and size, if animal and human cells differed and if epidermal and cheek cells could differ in shape, size, and color. The age groups that we planned to study were adolescent, young adult, and adult for both human and animal. The animals that we studies were in the canine and lizard class. The collection of these cells played a vital role in our experiment. We documented who or what gave us the sample, the location of the sample, and the condition of the area. We prepared wet mount slides to examine the samples using the light microscope. Doing this experiment we compared and contrasted the samples. Finding that the age does play a huge role in the appearance of the cell. We found that the epidermal and the cheek cells do differ in the shape and scar tissue and healthy tissue also differ.…

    • 2913 Words
    • 12 Pages
    Best Essays
  • Good Essays

    The human body consists of eleven major organ systems that maintain homeostasis: the skeletal, muscular, circulatory, nervous, respiratory, digestive, urinary, endocrine, reproductive, integumentary and lymphatic systems. These organ systems are dependent on each other to keep the human body in homeostasis. For example, the nervous and endocrine systems coordinate functions of other body systems because they allow information to be communicated throughout the body. The nervous system consists of the brain, nerves and spinal cord. It is the fast acting control system because it responds to internal and external changes throughout the body. The integumentary system forms external covering and protects deeper tissue from injury, it includes hair,…

    • 306 Words
    • 2 Pages
    Good Essays
  • Powerful Essays

    Integumentary System

    • 785 Words
    • 4 Pages

    Before beginning, set up a data table similar to this Data Table 1. Fill in the names of the numbered structures.…

    • 785 Words
    • 4 Pages
    Powerful Essays