A&P Exam Review: Chapter 3 - Cells
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Questions and Answers

What is the primary function of the cochlea in the inner ear?

  • Production of auditory hormones
  • Balance maintenance
  • Hearing receptor housing (correct)
  • Regulation of blood pressure
  • Which gland is responsible for stimulating milk production in mammary glands?

  • Adrenal gland
  • Pituitary gland (correct)
  • Pancreas
  • Thyroid gland
  • What occurs when there is an over-secretion of thyroid hormone?

  • Goiter formation
  • Metabolism slows down
  • Calcium levels drop
  • Metabolism speeds up (correct)
  • What is the main role of parathyroid hormone in the body?

    <p>Increases calcium levels in blood (A)</p> Signup and view all the answers

    Which of the following best describes Type I diabetes mellitus?

    <p>Characterized by destroyed pancreatic cells (C)</p> Signup and view all the answers

    What type of connective tissue is responsible for supporting and providing structure in the body?

    <p>Cartilage (A)</p> Signup and view all the answers

    Which of the following correctly describes the layers of skin?

    <p>Epidermis consists of stratified squamous epithelium (A)</p> Signup and view all the answers

    Which gland type releases its substances locally into ducts?

    <p>Exocrine glands (C)</p> Signup and view all the answers

    What function does the skin NOT perform?

    <p>Production of red blood cells (B)</p> Signup and view all the answers

    What characterizes fibrous connective tissue?

    <p>It includes loose and dense types. (B)</p> Signup and view all the answers

    Which type of muscle is involuntary and found in the heart?

    <p>Cardiac muscle (A)</p> Signup and view all the answers

    Where are melanocytes primarily found?

    <p>In the epidermis (A)</p> Signup and view all the answers

    Which of these membranes produces mucus and traps pathogens?

    <p>Mucous membrane (D)</p> Signup and view all the answers

    What is a key characteristic that distinguishes eukaryotic cells from prokaryotic cells?

    <p>Eukaryotic cells have specialized organelles. (B)</p> Signup and view all the answers

    Which structure is responsible for synthesizing ribosomes within the nucleus?

    <p>Nucleolus (D)</p> Signup and view all the answers

    What type of transport requires ATP to move substances against their concentration gradient?

    <p>Active transport (C)</p> Signup and view all the answers

    What element of the plasma membrane aids in identifying cells as 'self' or 'foreign'?

    <p>Glycoproteins (A)</p> Signup and view all the answers

    Which process involves the movement of water from high to low concentration?

    <p>Osmosis (B)</p> Signup and view all the answers

    Which type of tissue is primarily responsible for covering and lining organs and cavities?

    <p>Epithelial tissue (C)</p> Signup and view all the answers

    What is the function of the Golgi complex in the cell?

    <p>Modifies proteins (D)</p> Signup and view all the answers

    Which type of solution would cause a cell to swell due to water entering it?

    <p>Hypotonic solution (D)</p> Signup and view all the answers

    What is the primary function of osteoblasts in the skeletal system?

    <p>Build bone (A)</p> Signup and view all the answers

    Which type of muscle is involuntary and striated?

    <p>Cardiac muscle (D)</p> Signup and view all the answers

    What type of joint is characterized as non-movable, typically found between cranial bones?

    <p>Suture (B)</p> Signup and view all the answers

    Which of the following structures is found in the epiphyseal plate?

    <p>Growth plate cartilage (C)</p> Signup and view all the answers

    Which skeleton component includes bones of the limbs?

    <p>Appendicular skeleton (A)</p> Signup and view all the answers

    What type of muscle is found in the interior of hollow organs?

    <p>Smooth muscle (A)</p> Signup and view all the answers

    Which condition is characterized by the weakening of bone density?

    <p>Osteoporosis (C)</p> Signup and view all the answers

    What role do antagonistic muscles play in movement?

    <p>One contracts while the other relaxes (A)</p> Signup and view all the answers

    What is the primary function of red blood cells (erythrocytes)?

    <p>Carry oxygen (B)</p> Signup and view all the answers

    Which condition is characterized by low blood oxygen levels due to insufficient red blood cells?

    <p>Anemia (D)</p> Signup and view all the answers

    What are the glycoproteins on the surface of red blood cells that trigger an immune response called?

    <p>Antigens (C)</p> Signup and view all the answers

    Which blood type is considered the universal donor?

    <p>O negative (A)</p> Signup and view all the answers

    In which blood vessel does the exchange of materials with tissues mainly occur?

    <p>Capillaries (A)</p> Signup and view all the answers

    What is the role of platelets (thrombocytes) in the bloodstream?

    <p>Clotting of blood (A)</p> Signup and view all the answers

    What condition occurs when a Rh negative mother is pregnant with a Rh positive baby?

    <p>Hemolytic disease of the newborn (B)</p> Signup and view all the answers

    Which structure in the heart is responsible for separating the left and right sides?

    <p>Septum (C)</p> Signup and view all the answers

    What is the primary function of valves in the circulatory system?

    <p>To prevent the backflow of blood (A)</p> Signup and view all the answers

    Which process involves the movement of fluid out of the glomerulus into the glomerular capsule?

    <p>Glomerular filtration (D)</p> Signup and view all the answers

    What is the role of B lymphocytes in the immune system?

    <p>Produce antibodies (A)</p> Signup and view all the answers

    Which statement accurately describes the process of inhalation?

    <p>The thoracic cavity enlarges to decrease pressure (D)</p> Signup and view all the answers

    What condition occurs when the lower gastroesophageal sphincter fails to close properly?

    <p>Heartburn (A)</p> Signup and view all the answers

    Which type of cell is primarily involved in the cell-mediated immune response?

    <p>T lymphocytes (B)</p> Signup and view all the answers

    Which of the following statements correctly describes autoimmune disorders?

    <p>The immune system attacks its own tissues (A)</p> Signup and view all the answers

    What is the main consequence of atherosclerosis?

    <p>Blockage of blood flow due to fatty deposits (A)</p> Signup and view all the answers

    What are the primary organs responsible for waste elimination in the human body?

    <p>Kidneys and liver (A)</p> Signup and view all the answers

    What triggers the inflammatory response in the body?

    <p>Infection or injury (C)</p> Signup and view all the answers

    Which process is primarily responsible for the movement of food through the gastrointestinal tract?

    <p>Peristalsis (A)</p> Signup and view all the answers

    Which of the following accurately describes the role of the diaphragm in breathing?

    <p>It relaxes during exhalation to expel air (D)</p> Signup and view all the answers

    What marks the point of fertilization in human reproduction?

    <p>Zygote (D)</p> Signup and view all the answers

    Flashcards

    Eukaryotic cell

    A larger, more complex cell with specialized organelles, found in multicellular organisms.

    Prokaryotic cell

    A smaller, simpler cell lacking many organelles, found in single-celled organisms.

    Plasma membrane

    The phospholipid bilayer that surrounds a cell, controlling what enters and exits.

    Selective permeability

    The ability of a membrane to allow only certain substances to pass through.

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    Diffusion

    The movement of substances from high to low concentration without energy.

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    Active transport

    The movement of substances from low to high concentration using energy (ATP).

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    Hydrophobic

    Water-fearing; not dissolving in water (e.g., lipids).

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    Hydrophilic

    Water-loving; dissolving in water (e.g., ions, polar substances).

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    Epithelial Tissue

    Covers body surfaces and lines body cavities; forms glands

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    Connective Tissue

    Connects, supports, and transports in the body; diverse types

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    Muscle Tissue

    Contracts to produce movement, three types: cardiac, smooth, skeletal

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    Nervous Tissue

    Conducts electrical impulses for communication; forms brain, spinal cord, nerves

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    Skin Layers

    Epidermis (outer; dead cells), Dermis (inner; vessels, nerves), and Hypodermis (adipose tissue)

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    Homeostasis

    Maintaining a stable internal environment

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    Negative Feedback

    Mechanism that reduces a stimulus; like a thermostat

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    Positive Feedback

    Mechanism that increases a stimulus, such as childbirth

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    Skeletal System Function

    Provides support, movement, protection, mineral storage, and blood cell production.

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    Compact Bone

    Dense bone tissue that is found in the shafts of long bones.

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    Spongy Bone

    Bone tissue with cavities like a sponge, found inside the ends of long bones.

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    Osteocyte

    A bone cell.

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    Axial Skeleton

    The part of the skeleton that forms the head, neck, and trunk.

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    Synovial Joint

    A freely movable joint.

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    Fontanel

    Soft spots in a baby's skull that allow for the head to compress during childbirth and brain growth.

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    Antagonistic Muscles

    Muscles that work together in pairs, where one contracts while the other relaxes, allowing for movement.

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    Endocrine Glands

    Glands that release hormones directly into the bloodstream.

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    Hormone

    A chemical signal released by endocrine glands into the bloodstream, affecting target cells.

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    Target Cell

    A cell that responds to a specific hormone because it contains receptors for that hormone.

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    Pituitary Gland

    The master endocrine gland located at the base of the brain.

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    Type II Diabetes

    A condition where the body produces insulin, but cells don't respond properly to it, leading to high blood sugar.

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    Blood Functions

    Blood transports nutrients and waste, carries gases (oxygen & CO2), distributes hormones and helps fight infection.

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    Plasma

    The liquid component of blood, containing dissolved substances like nutrients, proteins, and waste.

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    Red Blood Cells (RBCs)

    These cells carry oxygen throughout the body with the help of hemoglobin.

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    White Blood Cells (WBCs)

    These cells are part of the immune system, fighting infection and destroying pathogens.

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    Platelets

    Tiny cell fragments responsible for blood clotting, essential for stopping bleeding.

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    Hemoglobin

    A protein found in RBCs, responsible for binding and transporting oxygen and carbon dioxide.

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    Jaundice

    A condition characterized by yellowing of skin and whites of the eyes, caused by a build-up of RBC breakdown products in the liver.

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    Deoxygenated blood

    Blood that has delivered oxygen to tissues and picked up carbon dioxide, traveling back to the heart and lungs.

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    Hypertension

    High blood pressure, where the force of blood against artery walls is too high.

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    Atherosclerosis

    Buildup of fatty deposits inside arteries, narrowing them and reducing blood flow.

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    Angiogram

    A medical imaging test using dye to visualize blood vessels, particularly for detecting blockages due to atherosclerosis.

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    Myocardial infarction

    A heart attack, caused by oxygen deprivation to the heart muscle, leading to tissue death.

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    Valve function

    To prevent backflow of blood within the heart and blood vessels, ensuring one-way flow.

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    Lymphatic system function

    Removes excess fluid from tissues and helps transport immune cells and substances to fight infections.

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    Phagocyte

    A type of immune cell that engulfs and destroys harmful microbes and cellular debris.

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    Thymus gland

    An organ responsible for training and maturing immune cells, especially during childhood.

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    Pathogen

    A foreign microorganism, like bacteria or viruses, capable of causing disease.

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    Barrier defense

    The body's first line of defense against pathogens, including skin, mucous membranes, and stomach acid.

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    Inflammatory reaction

    A localized response to injury or infection, characterized by redness, swelling, heat, and pain.

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    B lymphocytes (B cells)

    Produce antibodies to fight infections, a type of antibody-mediated immune response.

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    T lymphocytes (T cells)

    Attack infected cells directly, involved in cell-mediated immunity.

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    Vaccination

    Injecting weakened or inactive pathogens to trigger an immune response, building immunity and memory against future infections.

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    Study Notes

    A&P Exam Review

    • The exam covers chapters 3-17 (excluding chapter 8) plus the appendix lecture in unit 1.
    • Study all materials thoroughly.

    Chapter 3 - Cells

    • Eukaryotic vs. Prokaryotic: Eukaryotic cells are larger, more complex, and contain specialized organelles. Multicellular organisms have eukaryotic cells; prokaryotic cells are smaller and lack most organelles and are single celled.
    • Cell Structure:
      • Nucleus - stores DNA, enclosed by a nuclear envelope.
      • Nucleolus - produces ribosomes.
      • Nuclear pores - control passage of substances into and out of the nucleus.
      • Ribosomes - produce proteins.
      • Rough endoplasmic reticulum (RER) - has ribosomes, synthesizes proteins.
      • Smooth endoplasmic reticulum (SER) - no ribosomes, synthesizes lipids.
      • Golgi complex - modifies proteins.
      • Mitochondria - performs cellular respiration, produces ATP.
      • Cytoskeleton - provides structure and support for organelles.
      • Cytoplasm - fluid containing dissolved substances and organelles.
      • Extracellular fluid - surrounds cells, holds organelles.
      • Plasma membrane - lipid bilayer with hydrophilic heads facing outwards and hydrophobic tails facing inward, allows only certain substances through.
      • Hydrophobic and small hydrophilic substances cross plasma membrane easily.
      • Proteins on cell surface help identify cells as self or foreign (glycoproteins).
      • Diffusion - movement of substances from high to low concentration without energy.
      • Osmosis - movement of water from high to low concentration.
      • Active transport - movement of substances from low to high concentration using energy (ATP).
      • Exocytosis - vesicles move substances out of the cell.
      • Endocytosis - vesicles move substances into the cell.

    Chapter 4 - Organization and Regulation of Body Systems

    • Four types of tissue: epithelial, connective, muscle, nervous.
    • Connective tissue:
      • Functions: binding, support, transport, energy storage.
      • Types: fibrous (loose, dense), cartilage (support), bone, blood.

    Muscle

    • Three types: cardiac, skeletal, and smooth.
    • Skeletal (voluntary)
    • Cardiac (involuntary)
    • Smooth(involuntary)

    Nervous Tissue

    • Definitions of brain, spinal cord, nerves.

    Epithelial Tissue

    • Shape: squamous (flattened), cuboidal (cube-shaped), columnar (column-shaped).
    • Layers: simple (single layer), stratified (multiple layers)
    • Glands: endocrine (releases hormones into the blood), exocrine (releases substances into ducts).

    Skin

    • Functions: protection, regulation body temperature, sensory perception, vitamin D production.
    • Two layers: epidermis (outer layer), dermis (inner layer).

    Cavities

    • Thoracic, pleural, pericardial, abdominal, cranial, spinal.

    Membranes

    • Mucous (lines body cavities open to the environment), serous_(lines closed body cavities), synovial (lines joints), meninges (surrounding the brain and spinal cord).

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    Description

    Prepare for your A&P exam with this review focusing on Chapter 3, which covers essential concepts about eukaryotic and prokaryotic cells, their structures, and functions. Study materials include details on the nucleus, ribosomes, and various cell organelles. Be well-equipped to tackle questions related to cell biology.

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