General Physiology Review Questions
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Which of the following best describes homeostasis?

  • Maintenance of body function at the optimum level at all times
  • Multiple systems working cooperatively to maintain body function at an optimal level
  • Multiple systems working cooperatively to maintain body function within normal limits (correct)
  • Maintenance of body functions
  • What component of the homeostatic regulatory mechanism detects a stimulus?

  • A control center
  • An efferent pathway
  • A receptor (correct)
  • An effector
  • Which scenario is an example of positive feedback?

  • Increased heart rate during exercise to meet oxygen demand
  • Blood glucose level rising after a meal, which causes the release of insulin to decrease blood glucose
  • A blood clot that results in the release of factors that stimulate more blood clotting (correct)
  • Body temperature rising during hot weather, resulting in sweating
  • Which organelle is responsible for synthesizing fatty acids and steroids?

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

    Which of the following statements about the nucleus is true?

    <p>It is where most of the cell’s hereditary units are located (A), Nucleoli within the nucleus are the sites of ribosome synthesis (C), In nondividing cells, DNA is found in the nucleus in the form of chromatin (D)</p> Signup and view all the answers

    What is the primary role of insulin in blood glucose regulation?

    <p>Increasing glucose absorption in muscle and fat cells (B)</p> Signup and view all the answers

    Which mechanism primarily operates to maintain cardiovascular homeostasis?

    <p>Neural regulation through baroreceptors (B)</p> Signup and view all the answers

    Which system plays a vital role in hormonal regulation?

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

    What is the primary component of blood that lacks fibrinogen and other clotting factors?

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

    Which area of the brain is primarily responsible for coordinating skilled movements and regulating posture and balance?

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

    What type of aphasia results from damage to Broca’s speech area?

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

    The dominant adrenergic receptor primarily found in the heart is known as:

    <p>Beta 1 (C)</p> Signup and view all the answers

    Erythropoietin, which directly controls erythrocyte production, is primarily produced in which organ?

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

    Damage to Wernicke’s speech area leads to which type of aphasia?

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

    What is the role of thrombopoietin in the body?

    <p>Stimulates platelet production (C)</p> Signup and view all the answers

    Which part of the brain is often referred to as the 'seat of intelligence'?

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

    Which cells are primarily responsible for cell-mediated acquired immunity?

    <p>T-lymphocyte (C)</p> Signup and view all the answers

    Which cranial nerve stimulates the parotid gland to secrete saliva?

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

    An elevated white blood cell count of 15,000 in a 30-year-old male is most indicative of what condition?

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

    Which vitamin is essential for the formation of clotting factors in the liver?

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

    When a blood vessel is damaged, platelets first adhere to which structure?

    <p>Sub-endothelial matrix (A)</p> Signup and view all the answers

    Which chamber of the heart has the thickest myocardium?

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

    What is the correct route of blood flow from the systemic circulation through the heart?

    <p>Right atrium, tricuspid valve, right ventricle, pulmonary valve, left atrium, bicuspid valve, left ventricle, aortic valve (D)</p> Signup and view all the answers

    What do hormones primarily regulate in the body?

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

    Flashcards

    Acquired Immunity Cells

    T-lymphocytes are the key cells in acquired immunity.

    Saliva Gland Stimulating Nerve

    Cranial nerve VII (CN VII) stimulates the parotid gland.

    High WBC Count (Leukocytosis)

    A white blood cell count above normal (15,000 in a 30-year-old male) indicates leukocytosis.

    Clotting Factor Vitamin

    Vitamin K is necessary for liver production of clotting factors.

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    Platelet Adhesion Site

    Platelets adhere to the sub-endothelial matrix when a blood vessel is damaged.

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    Heart Chamber with Thickest Myocardium

    The left ventricle has the thickest myocardium in the heart.

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    Blood Flow Through Heart (Systemic)

    The route is right atrium, tricuspid valve, right ventricle, pulmonary valve, lungs, left atrium, mitral valve, left ventricle, aortic valve, body.

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    Immune Defense Materials

    Immune defense materials play a crucial part in the immune response.

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    Homeostasis

    The ability of a biological system to maintain a stable internal environment despite external changes.

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    Positive Feedback

    A feedback loop where the initial stimulus triggers further amplification of the response.

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    Cell Membrane Components

    The cell membrane is composed of phospholipids, cholesterol, and proteins.

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    Smooth ER Function

    The smooth endoplasmic reticulum (ER) is involved in synthesizing lipids, detoxifying harmful substances, and releasing glucose.

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    Nucleus Function

    The nucleus contains the cell's genetic material (DNA) and is responsible for ribosome synthesis.

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    Site of Protein Synthesis

    Ribosomes are the sites where proteins are synthesized.

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    Components of Homeostatic Regulatory Mechanism

    A homeostatic regulatory mechanism comprises a receptor, a control center, and an effector.

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    Cell Membrane Function

    The cell membrane acts as a barrier, regulates what enters and exits the cell, and plays a role in cell communication.

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    What is Broca's aphasia?

    A type of aphasia characterized by difficulty speaking fluently due to damage to Broca's area in the brain.

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    What is Wernicke's aphasia?

    A type of aphasia characterized by difficulty understanding language and producing meaningful speech due to damage to Wernicke's area in the brain.

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    What does the Cerebellum do?

    The Cerebellum coordinates skilled movements, regulates posture and balance, and helps with motor learning.

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    What is the Beta 1 receptor?

    The dominant adrenergic receptor in the heart, responsible for increasing heart rate and contractility.

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    What is Serum?

    The fluid portion of blood that lacks fibrinogen and other clotting factors.

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    What stimulates Erythrocyte Production?

    Erythropoietin, a hormone produced by the kidneys, directly controls the production of red blood cells.

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    What is the role of the Thalamus?

    The thalamus acts as a relay center for sensory information, filtering and directing it to the appropriate areas of the brain.

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    What is the Hypothalamus?

    The hypothalamus controls essential bodily functions like temperature regulation, hunger, thirst, and sleep-wake cycles.

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    Study Notes

    General Physiology Review Questions

    • Homeostasis: Multiple systems working together to maintain body functions within normal limits, at an optimal level at all times.
    • Homeostatic Regulatory Mechanism: Components include a receptor that detects a stimulus, a control center that processes information, and an effector that responds to the stimulus.
    • Positive Feedback: Enhances the original stimulus, like blood clotting. Good examples are blood clotting and shivering.
    • Proteins Responding To Hormones: Receptor proteins bind to hormones or other trigger molecules to initiate specific cell responses.
    • Water Diffusion: Osmosis is the diffusion of water across a semipermeable membrane.
    • Oxygen Cell Entry: Oxygen enters cells via diffusion.
    • Cell Membrane Composition: Cell membranes contain phospholipids, cholesterol, but not galactose or nucleic acid.
    • Organelle Function: Smooth Endoplasmic Reticulum (ER) helps in synthesizing fatty acids and steroids, and liver detoxification.
    • Nucleus Role: The nucleus houses DNA and is responsible for ribosome synthesis and storing chromatin.
    • Protein Synthesis Location: Ribosomes are the sites of protein synthesis, both free and attached.
    • Protein Synthesis Sequence: Proteins are synthesized in a sequence: DNA template making mRNA, mRNA leaving nucleus, mRNA attaching to ribosome, ribosomes reading mRNA to synthesize proteins.
    • Sodium-Potassium Pump Ratio: The sodium-potassium pump has a 3:2 ratio in transport.
    • Muscle Contraction Speed: Skeletal muscle has the fastest contraction speed.
    • Muscle Contraction Duration: Smooth muscle has the longest duration of contraction.
    • Transcription: The copying of DNA message onto mRNA.
    • Chromatin: DNA in nondividing cells is in the form of chromatin, a less condensed form.
    • Muscle Contraction Calcium Requirement: Calcium binds to troponin, allowing actin and myosin to interact, which is required for skeletal muscle contraction.
    • Calcium Ion Storage: Sarcoplasmic reticulum is responsible to store calcium ions similar to smooth endoplasmic reticulum.
    • DNA Copying (transcription): GGCAGACTT becomes CCGUCUGAA

    Cranial Nerves & Physiology

    • Cranial Nerve I: Olfactory
    • Autonomic Preganglionic Fibers: Cholinergic
    • Neurotransmitter in Autonomic Nerves: Acetylcholine (in preganglionic fibers of the parasympathetic nerves and preganglionic sympathetic nerves)

    Brain Regions & Functions

    • Medulla Oblongata: Controls breathing, heart rate, blood vessel diameter and vomiting/coughing
    • Broca's Area Damage: Results in nonfluent aphasia.
    • Wernicke's Area Damage: Results in fluent aphasia.
    • Cerebellum Function: Coordinates skilled movements and posture
    • Parietal Lobe: Coordinates skilled movements, posture, and balance
    • Intelligence Seat: The cerebrum is the "seat of intelligence."

    Blood & Cardiovascular

    • RBC Count Norm (Men): 13-18 grams per deciliter.
    • WBC Count Norm: 5,000-10,000 per liter of blood.
    • Platelet Count Norm: 150,000 - 400,000 per microliter of blood.
    • Types Of Blood Vessels Arteries, Veins, Capillaries
    • Most Important Vessel for Peripheral Resistance: Arterioles
    • Oxygen Carrying Protein: Hemoglobin
    • Blood Pressure Measurement: Diastolic pressure is indicated by the sound disappearance while the cuff is deflated.
    • Pacemaker SA node(Sinoatrial node)

    Blood Clotting & Transfusion Reactions

    • Clotting Factor Formation: Vitamin K is necessary for liver formation of clotting factors.
    • Transfusion Reaction: A transfusion reaction can occur if the recipient's blood type is incompatible with the donor's blood type.

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    Description

    Test your understanding of key concepts in general physiology through a series of review questions. Topics include homeostasis, feedback mechanisms, cellular responses, and membrane composition. Perfect for reinforcing essential physiological principles.

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