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Exam 2 Review - MISC from last exam Nervous Tissue 19:09:00...

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MISC from last exam 30/03/2008 19:09:00 Nervous Tissue Conducts nervous impulses from one part of the body to another 2 types of cells Neurons o Generate and conduct nerve impulses Glial (neurologlia) o Surround, support and protect neurons Organs Formed from at least 2 tissues types that function together Most organs are housed in body cavities Dorsal o Cranial cavity o Spinal cavity Ventral o Thoracic cavity o Abdominal cavity Tissue Membranes Line body cavities and organ systems Sheets of epithelium supported by connective tissue Form physical barriers that protect underlying tissues
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Tissue Membranes 4 types Mucous membranes o Lines passageways that open to exterior Serous membranes o Line and lubricates body cavities and organs within Synovial membranes o Line cavities between bones of freely movable joints Cutaneous membranes o Skin, covers outside of body Which type of tissue membrane would you find lining the thoracic and abdominal  cavity? Serous membranes Organ Systems 2 or more organs that work together for a common function 11 major organ systems The Integumentary System Composed of the skin and its derivatives Functions Protection Regulate body temperature Production of Vitamin D
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Sensation o Provide info about external world Skin has 2 layers Epidermis Thin outer layer of epithelial tissue  o Stratified Squamous Protective barrier Dermis Inner layer of connective tissue Contains blood vessels, nerves, glands, and follicles Hypodermis Supportive layer below the skin Composed of loose connective tissue containing fat cells Surface Epidermal cells of the skin are? Dead and filled with Keratin Keratin is a type of intermediate filament Skin Derivatives Many diverse structures are derived from the epidermis Hair o Dead skin cells filled with keratin and formed into a column Nails
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o Dead cells designed to protect the tips of our toes and fingers Glands o Oil (sebaceous) o Sweat Sebaceous and sweat glands secrete their product into ducts and are thus? Exocrine glands Homeostasis A state of relative internal constancy Must constantly adjust in response to changes in the internal and external  environments Homeostasis is maintained by negative feedback Corrective measures that slow or reverse a variation from the normal value of the  factor Homeostatic Control Mechanism Receptor (sensor) Detects change and sends the information to the control center Control Center Compares information from receptors to set point (normal values) Effector Carries out selected response Muscle or gland
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