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Epithelial Tissue

Epithelial Tissue

Assessment

Presentation

•

Biology

•

University

•

Medium

•
NGSS
HS-LS1-2, HS-LS1-4

Standards-aligned

Created by

Christine Boudreau

Used 4+ times

FREE Resource

2 Slides • 24 Questions

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​Epithelial
Tissue

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The four types of tissue include epithelial, connective, muscle, and _________ tissue.

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This type of tissue covers body surfaces, lines body cavities, and forms glands. It is a protective barrier, controls permeability, provides sensation, and produces secretions.

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________ tissue consists of a few cells embedded in an extensive extracellular matrix composed of fibers (collagen, elastic, and reticular) and ground substance. The cells include fibroblasts, adipocytes, macrophages, mast cells, and others. It varies in vascularity, from avascular (cartilage) to highly vascular (bone).

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________ tissue is composed of elongated cells called muscle fibers that contain contractile proteins (actin and myosin). It is highly vascularized to meet the high metabolic demands of muscle cells. There are three types of muscle tissue: skeletal, cardiac, and smooth.

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________ tissue is composed of neurons (nerve cells) and neuroglia (supporting cells). Neurons have a cell body (soma), dendrites (receive signals), and an axon (sends signals). Neuroglia support, protect, and nourish neurons.

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Open Ended

Describe the primary functions of epithelial tissues.

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Epithelial tissues act as a barrier _________ underlying tissues from mechanical injury, harmful chemicals, pathogens, and excessive loss of water. For example, the skin's epidermis is a type of epithelial tissue that protects the body from external damage.

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Certain epithelial tissues are specialized to absorb substances. For instance, the epithelial lining of the ____________ is adapted for the absorption of nutrients from digested food into the bloodstream.

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Epithelial tissues also play a role in ________. In the kidneys, the epithelial cells in the glomeruli filter blood to form urine, removing waste products while retaining necessary molecules and water.

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Epithelial tissues are involved in the _______ of waste products. For instance, the epithelial lining of the urinary tract facilitates the removal of urine from the body.

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Many epithelial tissues are specialized to secrete substances. ________ epithelia form glands that produce and secrete hormones, enzymes, mucus, and other essential substances. For example, the epithelial cells in the stomach glands secrete digestive enzymes and acid.

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Epithelial tissues contain specialized cells that are capable of _______ stimuli. For example, the olfactory epithelium in the nose contains sensory receptors for the sense of smell.

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Open Ended

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What is the difference between simple and stratified epithelia?

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Simple epithelia consist of a _____ layer of cells.

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The primary functions of simple epithelia include absorption, secretion, and filtration. The single-cell layer allows for efficient _______ of materials.

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Composed of flat, thin cells; found in areas where rapid diffusion or filtration occurs, such as the alveoli of the lungs and the glomeruli of the kidneys.

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Consists of cube-shaped cells; commonly found in glandular tissues and in the tubules of the kidneys.

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Consists of cube-shaped cells; commonly found in glandular tissues and in the tubules of the kidneys.

21

Multiple Choice

Appears stratified due to the varying positions of nuclei within the cells but is actually a single layer; lines the respiratory tract, where it functions in secretion and movement of mucus.

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simple squamous

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simple cuboidal

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simple columnar

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pseudostratified columnar epithelium

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_______ epithelia consist of multiple layers of cells, with only the deepest layer in contact with the basement membrane.

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The primary function of stratified epithelia is _______ against abrasion, pathogens, and chemical attack. The multiple layers provide a more robust barrier.

24

Multiple Choice

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Specialized to stretch and change shape; found in the urinary bladder, allowing it to expand and contract.

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transitional epithelium

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Stratified Columnar Epithelium

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Stratified Cuboidal Epithelium

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Stratified Squamous Epithelium

25

Open Ended

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Discuss the polarity of epithelial cells, including differences between apical and basal surfaces

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Epithelial cells exhibit _______, meaning they have distinct structural and functional differences between their apical (top) and basal (bottom) surfaces. This polarity is crucial for the specialized functions of epithelial tissues.

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​Epithelial
Tissue

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