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Questions and Answers
Which type of disease is characterized by the progressive deterioration of tissues and organs due to aging?
Which type of disease is characterized by the progressive deterioration of tissues and organs due to aging?
What is the primary function of mitochondria within a human cell?
What is the primary function of mitochondria within a human cell?
What distinguishes a eukaryote cell from a prokaryote cell?
What distinguishes a eukaryote cell from a prokaryote cell?
Which of the following accurately describes the function of ribosomes within a cell?
Which of the following accurately describes the function of ribosomes within a cell?
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What is the primary difference between a benign tumor and a malignant tumor?
What is the primary difference between a benign tumor and a malignant tumor?
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Which type of cell is most directly responsible for the development of cancer?
Which type of cell is most directly responsible for the development of cancer?
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What is the primary difference between rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER)?
What is the primary difference between rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER)?
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How does cell differentiation contribute to the complexity of a multicellular organism?
How does cell differentiation contribute to the complexity of a multicellular organism?
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Which of the following statements accurately describes the role of the Golgi apparatus in a human cell?
Which of the following statements accurately describes the role of the Golgi apparatus in a human cell?
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Which of the following are biological factors that influence a person's health? (Select all that apply)
Which of the following are biological factors that influence a person's health? (Select all that apply)
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What type of muscle tissue is responsible for the contraction of internal organs?
What type of muscle tissue is responsible for the contraction of internal organs?
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What is the function of microglia in the nervous system?
What is the function of microglia in the nervous system?
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What is the definition of health according to the WHO?
What is the definition of health according to the WHO?
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Which of the following is NOT a determining factor of health?
Which of the following is NOT a determining factor of health?
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What type of tissue provides support and protection to the body, filling spaces between organs?
What type of tissue provides support and protection to the body, filling spaces between organs?
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Which of the following is a characteristic of adipose tissue?
Which of the following is a characteristic of adipose tissue?
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Which of the following is NOT a type of connective tissue?
Which of the following is NOT a type of connective tissue?
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What is the main function of the respiratory system?
What is the main function of the respiratory system?
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What is the difference between a symptom and a sign?
What is the difference between a symptom and a sign?
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Which of the following is a characteristic of acute diseases?
Which of the following is a characteristic of acute diseases?
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What type of disease is caused by a pathogenic microorganism or a substance produced by it?
What type of disease is caused by a pathogenic microorganism or a substance produced by it?
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Which of the following is NOT a lifestyle factor that influences health?
Which of the following is NOT a lifestyle factor that influences health?
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What type of muscle tissue is found in the walls of the heart?
What type of muscle tissue is found in the walls of the heart?
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Which type of epithelial tissue is responsible for the secretion of substances?
Which type of epithelial tissue is responsible for the secretion of substances?
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What is the function of the urinary system?
What is the function of the urinary system?
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Which of the following is NOT a component of the nervous system?
Which of the following is NOT a component of the nervous system?
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Flashcards
Chronic diseases
Chronic diseases
Conditions that develop slowly and last a long time, sometimes a lifetime.
Genetic diseases
Genetic diseases
Disorders caused by alterations in genes, affecting health over generations.
Tumor or neoplastic diseases
Tumor or neoplastic diseases
Caused by abnormal cell proliferation, often linked to cancer.
Immune disorders
Immune disorders
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Mental disorders
Mental disorders
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Degenerative diseases
Degenerative diseases
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Prions
Prions
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Reservoir
Reservoir
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Host
Host
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Immunity
Immunity
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Levels of organization
Levels of organization
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Atomic level
Atomic level
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Molecular level
Molecular level
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Cellular level
Cellular level
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Tissue level
Tissue level
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Human cells
Human cells
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Cancer
Cancer
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Tumor
Tumor
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Prevention and Early Detection
Prevention and Early Detection
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Risk Factors for Cancer
Risk Factors for Cancer
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Muscle Tissue
Muscle Tissue
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Skeletal Muscle
Skeletal Muscle
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Cardiac Muscle
Cardiac Muscle
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Smooth Muscle
Smooth Muscle
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Epithelial Tissue
Epithelial Tissue
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Nervous Tissue
Nervous Tissue
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Connective Tissue
Connective Tissue
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Nutrition Function
Nutrition Function
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Health Determining Factors
Health Determining Factors
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Disease
Disease
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Symptoms vs Signs
Symptoms vs Signs
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Types of Diseases by Origin
Types of Diseases by Origin
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Acute Diseases
Acute Diseases
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Study Notes
Levels of Organization in the Human Body
- Human bodies, like all living things, have a hierarchical structure.
- Basic units are atoms.
- Atoms combine to form molecules.
- Molecules combine to form cells, considered the first level of life.
- Similar cells working together create tissues.
Human Cells
- Human cells are eukaryotic and heterotrophic (taking in external nutrients).
- They have a nucleus enclosing genetic material, unlike prokaryotes.
- Essential cell functions include nutrition, interaction, and reproduction.
Cellular Organelles
- Ribosomes: Protein production sites, non-membrane bound particles.
- Mitochondria: Oval shaped, site of cellular respiration and energy production.
- Endoplasmic Reticulum (ER): Network of membranous sacs and channels, rough (with ribosomes) and smooth types.
- Golgi Apparatus: Flattened sacs (cisternae) responsible for processing and packaging molecules.
- Vesicles: Small membranous sacs transporting and storing materials within the cell.
Cell Differentiation and Disease
- Cells follow a growth, division, and death cycle.
- Cancer: Uncontrolled cell proliferation, forming a tumor.
- Tumors can be benign (slow growth, confined) or malignant (cancer, invasive).
- Many factors contribute to cancer development.
- Prevention and early detection are crucial.
Tissue Types
- Muscle tissue: Composed of elongated cells (myocytes) with contractile proteins.
- Skeletal muscle: Striated, elongated cylindrical cells (multi-nucleated), voluntary movement (attached to bones).
- Cardiac muscle: Striated, branched cells (one or two nuclei), involuntary heart contractions.
- Smooth muscle: Non-striated, single-nucleated cells, involuntary movements (internal organs, blood vessels).
- Epithelial tissue: Layers of closely packed cells, covering surfaces and lining cavities.
- Two types: lining and glandular.
- Nervous tissue: Conducts nerve signals, composed of neurons and glial cells.
- Microglia: Protects against infections, removes damaged cells.
- Oligodendrocytes: Forms a protective sheath around neuron extensions.
- Neurons: Highly specialized cells, can't divide.
- Astrocytes: Nourish neurons via blood capillaries.
- Connective tissue: Supports, connects and separates tissue.
- Loose connective tissue: Abundant matrix, fills spaces between organs
- Adipose tissue: Scarce matrix, fat-storing cells for insulation, energy reserves.
- Blood tissue: Liquid matrix (plasma), transports substances.
- Cartilaginous tissue: Flexible matrix with fibers, supports the developing skeleton.
- Bone tissue: Hard solid mineralized matrix (calcium and phosphorus), provides structural support.
Function of Nutrition
- Nutrition provides materials for structure and energy for vital processes.
- Respiratory system: Gathers oxygen and releases carbon dioxide.
- Urinary system: Eliminates cellular waste products.
- Digestive system: Extracts nutrients and removes indigestible materials,.
Health and Illness
- Health: State of complete physical, mental, and social well-being, not just absence of disease (WHO definition).
- Three dimensions: social, physical, and mental health. Factors impacting well-being include societal structures like peace, education, housing, and equitable resources.
- Health-determining factors:
- Biological: Genetics and physiology.
- Lifestyle: Personal behaviours (diet, exercise).
- Environment: Natural elements (climate), artificial factors (pollution), and socioeconomic aspects.
- Health system: Quality and access to healthcare resources.
- Disease: Disruption to body structure or function.
- Etiology: The study of disease causes.
Types of Diseases
- Infectious (due to pathogens): caused by microorganisms like prions, viruses, bacteria, fungi, or parasites.
- Non-infectious:
- Genetic: Gene mutations, e.g., Down Syndrome.
- Tumor/Neoplastic: Abnormal cell growth, e.g., cancer.
- Immune : Disorder of the immune system, e.g., allergies.
- Mental disorders: Disturbances in thoughts, emotions, or behaviours, e.g., anxiety.
- Degenerative: Progressive tissue/organ degradation, e.g., Alzheimer's.
- Nutritional and behavioural: Poor nutrition, eating disorders.
- Accidents: Injuries, burns, poisonings.
- Environmental Exposure: E.g., asbestosis.
Pathogens, Reservoirs & Sources
- Pathogens: Microorganisms causing disease.
- Reservoir: Natural habitat of a pathogen.
- Source: Where a pathogen is acquired by the host.
Host, Endemic & Epidemic
- Host: An organism (animal, plant) harboring a pathogen.
- Endemic: Regular disease presence within a geographic area.
- Epidemic: Sudden spread of a disease within a geographic area.
- Pandemic: An epidemic spreading across multiple countries or continents.
Immunity
- Immunity: Body's defense system against harmful agents.
- Innate immunity: First and second lines of defense.
- Primary barriers: Prevent entry (skin, mucous membranes).
- Secondary barriers: Fight invaders (inflammation, phagocytes).
- Acquired immunity: Body adapts and improves defenses over time, remembering pathogens.
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Description
Explore the hierarchical structure of the human body, starting from atoms to cells and their functions. Understand how cells, as the basic units of life, are organized into tissues, and learn about various cellular organelles. This quiz covers essential concepts in human biology.