Skeletal System and Nasal Complex Quiz
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Questions and Answers

Which layer of the skin is the thinnest?

  • Epidermis (correct)
  • Dermis
  • Hypodermis
  • Stratum basale

    • What is the purpose of the subcutaneous layer?

  • To produce sweat
  • To store fat (correct)
  • To provide sensation
  • To protect the skin

    • Which layer of the skin contains accessory structures such as glands, hair, blood, and nerves?

  • Hypodermis
  • Dermis (correct)
  • Epidermis
  • Stratum basale

    • What is the function of osteoblasts?

    <p>To build bones</p> Signup and view all the answers

    Which type of joint allows for the greatest range of motion?

    <p>Ball and socket joint</p> Signup and view all the answers

    What is the main function of sweat glands?

    <p>To regulate body temperature</p> Signup and view all the answers

    Which layer of the epidermis contains cells that are constantly dividing through mitosis?

    <p>Stratum basale</p> Signup and view all the answers

    Which bones form the nasal septum?

    <p>Ethmoid bone and vomer</p> Signup and view all the answers

    How many vertebrae are in the thoracic region?

    <p>12</p> Signup and view all the answers

    Which curve of the vertebral column develops with the ability to stand?

    <p>Lumbar curve</p> Signup and view all the answers

    Which ribs are attached directly to the sternum?

    <p>True ribs</p> Signup and view all the answers

    Which type of joint allows the widest range of motion?

    <p>Ball and socket joint</p> Signup and view all the answers

    What is the function of skeletal muscles in maintaining body temperature?

    <p>Produce heat</p> Signup and view all the answers

    What is the role of acetylcholine in muscle contraction?

    <p>Stimulates acetylcholine release</p> Signup and view all the answers

    Which layer of the skin is responsible for making keratin and becoming water resistant?

    <p>Stratum granulosum</p> Signup and view all the answers

    Where is thick skin found in the body?

    <p>Palms of hands and soles of feet</p> Signup and view all the answers

    How many layers of keratinized cells are found in the stratum corneum?

    <p>15 to 20</p> Signup and view all the answers

    How long does it take for a cell to move from the stratum basale to the stratum corneum?

    <p>7-10 days</p> Signup and view all the answers

    What is the pigment that colors the skin?

    <p>Melanin</p> Signup and view all the answers

    What is the function of melanocytes?

    <p>Production of melanin</p> Signup and view all the answers

    What is the process called when epidermal cells are exposed to UV radiation in sunlight and convert into vitamin D3?

    <p>Photosynthesis</p> Signup and view all the answers

    Which enzyme breaks down acetylcholine in the synaptic cleft?

    <p>Acetylcholinesterase</p> Signup and view all the answers

    What triggers sodium to enter the muscle cell in response to acetylcholine receptor binding?

    <p>Sodium itself</p> Signup and view all the answers

    What is the size of a motor unit indicative of?

    <p>The strength of muscle contraction</p> Signup and view all the answers

    Which type of muscle fibers are found in motor units responsible for gross movements, such as muscles in the leg?

    <p>Fast-twitch fibers</p> Signup and view all the answers

    Which type of muscle cells can contract without neural stimulation?

    <p>Cardiac muscle cells</p> Signup and view all the answers

    What is the main energy source for muscle contraction?

    <p>Adenosine triphosphate (ATP)</p> Signup and view all the answers

    What happens to ATP levels during muscle contraction?

    <p>ATP levels decrease</p> Signup and view all the answers

    What is the role of creatine phosphate (CP) in muscle contraction?

    <p>It helps generate ATP from ADP</p> Signup and view all the answers

    What are the four effects of aging on skeletal muscle?

    <p>Increase in muscle fiber diameter, decreased elasticity, increased fibrosis, decreased exercise tolerance</p> Signup and view all the answers

    Which layer of the skin is responsible for producing keratin and becoming water resistant?

    <p>Stratum corneum</p> Signup and view all the answers

    What is the main function of sebaceous glands?

    <p>To produce oil</p> Signup and view all the answers

    What is the relationship between sunlight exposure and vitamin D3?

    <p>Sunlight exposure causes the skin to produce vitamin D3</p> Signup and view all the answers

    Which type of joint allows for the greatest range of motion?

    <p>Ball and socket joint</p> Signup and view all the answers

    What are osteoblasts responsible for?

    <p>Building bone tissue</p> Signup and view all the answers

    What is the main function of sweat glands?

    <p>To regulate body temperature</p> Signup and view all the answers

    What is the role of melanocytes in the skin?

    <p>To produce melanin</p> Signup and view all the answers

    What is the main function of osteoclasts?

    <p>Secrete acid and enzymes that dissolve the matrix</p> Signup and view all the answers

    What is the purpose of the epiphyseal line?

    <p>To indicate the former location of the epiphyseal cartilage</p> Signup and view all the answers

    What is the process called when epidermal cells are exposed to UV radiation in sunlight and convert into vitamin D3?

    <p>Calcitriol conversion</p> Signup and view all the answers

    Which type of bone cells are responsible for producing new bone through a process called ossification?

    <p>Osteoblasts</p> Signup and view all the answers

    What is the function of melanocytes?

    <p>To produce melanin, a pigment that colors the skin</p> Signup and view all the answers

    What is the main energy source for muscle contraction?

    <p>ATP</p> Signup and view all the answers

    What is the function of sweat glands?

    <p>To regulate body temperature and excrete waste products</p> Signup and view all the answers

    Which bones form the nasal septum?

    <p>Ethmoid bone and vomer</p> Signup and view all the answers

    Which type of joint allows for the widest range of motion?

    <p>Ball and socket joint</p> Signup and view all the answers

    What triggers sodium to enter the muscle cell in response to acetylcholine receptor binding?

    <p>Troponin</p> Signup and view all the answers

    What is the role of acetylcholine in muscle contraction?

    <p>To bind to troponin and allow myosin to bind to actin</p> Signup and view all the answers

    What is the function of skeletal muscles in maintaining body temperature?

    <p>To generate heat</p> Signup and view all the answers

    Which curve of the vertebral column develops with the ability to stand?

    <p>Lumbar curve</p> Signup and view all the answers

    What happens to ATP levels during muscle contraction?

    <p>ATP levels decrease</p> Signup and view all the answers

    Which enzyme breaks down acetylcholine in the synaptic cleft?

    <p>Acetylcholinesterase</p> Signup and view all the answers

    What triggers sodium to enter the muscle cell in response to acetylcholine receptor binding?

    <p>Calcium ions</p> Signup and view all the answers

    What are the four effects of aging on skeletal muscle?

    <p>Decrease in muscle size, increase in muscle flexibility, decrease in tolerance for exercise, decrease in thermoregulation</p> Signup and view all the answers

    Which type of muscle fibers are found in motor units responsible for gross movements, such as muscles in the leg?

    <p>Type II muscle fibers</p> Signup and view all the answers

    What is the main function of skeletal muscles in maintaining body temperature?

    <p>To generate heat</p> Signup and view all the answers

    What is the role of acetylcholine in muscle contraction?

    <p>To trigger sodium entry into the muscle cell</p> Signup and view all the answers

    What happens to ATP levels during muscle contraction?

    <p>ATP levels decrease</p> Signup and view all the answers

    What is the role of creatine phosphate (CP) in muscle contraction?

    <p>To provide energy for muscle contraction</p> Signup and view all the answers

    Which layer of the skin is responsible for making keratin and becoming water resistant?

    <p>Stratum granulosum</p> Signup and view all the answers

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