Global Challenges

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90 Terms

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Acquired Immunodeficiency Syndrome (AIDS)

The later stage of HIV infection resulting in a weakened immune system susceptible to other infections.

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Afforestation

Growing trees to replace those cut down.

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Antibiotic

Medication curing bacterial disease by killing infective bacteria.

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Antibiotic Resistance

Bacteria's ability to resist antibiotics, providing evidence for evolution.

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Antibiotic Resistance Markers

Genes producing proteins enabling cells to resist antibiotics.

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Antigen

Protein on pathogen surface inducing an immune response.

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Antiseptic

Medication killing disease-causing microorganisms.

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Antiviral

Medication curing viral disease by killing infective viruses.

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Aseptic Techniques

Techniques to culture microorganisms under sterile conditions.

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Athlete’s Foot

Disease caused by fungus in animals, treated with antifungal creams.

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Autoclaving

Method to sterilize glassware and growth media in a heated container.

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Bacteria

Single-celled, prokaryotic pathogens (not all are pathogenic).

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Barley Powdery Mildew

Disease caused by fungus in plants, leading to white fluffy growth on leaves.

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Benign Tumour

Non-cancerous tumor that doesn't spread.

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Biodiversity

Variety of organisms in an ecosystem.

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Blood

Tissue containing red/white blood cells, plasma, and platelets.

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Bronchitis

Inflammation of bronchi and bronchioles, a non-communicable disease.

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Capture-Recapture

Estimating population size by marking and recapturing organisms.

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Cancer

Uncontrolled cell growth and division.

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Carcinogens

Cancer-causing chemicals or agents.

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Cardiovascular Disease

Non-communicable disease affecting the heart or blood vessels.

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Cell Wall

Outer layer providing strength and support to plant cells.

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Cervical Cancer

Disease resulting from prolonged HPV infection.

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Cilia

Hair-like structures on cells beating to waft substances.

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Cirrhosis

Disease causing liver scarring due to excess alcohol consumption.

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Communicable Disease

Spreadable disease caused by pathogens.

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Conservation

Preservation and management of the environment.

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Coronary Heart Disease

Blockage of coronary arteries affecting oxygen supply to the heart.

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Crown Gall Disease

Disease in plants caused by Agrobacterium, leading to stem and root tumors.

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Cuticle

Waxy leaf layer acting as a barrier to pathogens.

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Disease

Illness affecting animal or plant health.

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Ecosystem

Community of organisms and non-living components in an area.

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Ecotourism

Tourism benefiting local conservation schemes.

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Fertiliser

Materials added to soil to provide nutrients for plant growth.

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Flaming

Sterilization method to prevent contamination.

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Fungi

Eukaryotic pathogens, single-celled or multicellular.

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Genetic Engineering

Modifying an organism's genome to introduce desirable traits.

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Genetic Modification

Altering an organism's genetic information.

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Genome

Organism's complete genetic material.

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Habitat

Living place for organisms including biotic and abiotic factors.

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Health

Well-being concerning physical and mental state.

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Human Chorionic Gonadotropin (hCG)

Hormone present in pregnant women's urine.

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Human Immunodeficiency Virus (HIV)

Communicable virus transmitted through bodily fluids.

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Human Papillomavirus (HPV)

Communicable viral disease transmitted through unprotected sex.

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Hydroponics

Growing plants in a medium other than soil with added nutrients.

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Immune System

Body's defense against foreign bodies.

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Immunosuppressant Drugs

Medication suppressing the immune system post-transplant.

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Ligase

Enzyme joining DNA pieces together.

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Lymphocyte

White blood cell protecting against disease.

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Malaria

Disease caused by a protist spread by mosquitoes.

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Malignant Tumour

Cancerous tumor spreading rapidly.

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Monoclonal Antibodies

Specific antibodies produced from a single clone of cells.

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Non-Communicable Disease

Not spreadable, caused by environmental factors or inheritance.

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Non-Specific Defence System

Defense system against various pathogens.

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Pathogen

Microorganism causing disease.

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Pesticide

Chemical controlling pests around crops.

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Placebo

Inactive drug with no effect on the recipient.

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Plasmid

Circular DNA loop used as a vector in genetic engineering.

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Platelets

Cell fragments aiding blood clotting.

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Pollution

Contamination of the environment due to human intervention.

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Polymerase Chain Reaction (PCR)

Technique amplifying DNA fragments.

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Photosynthesis

Process by which trees take in CO2 and produce oxygen using sunlight.

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Biodiversity

Variety of different species in an ecosystem.

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Conservation

Efforts to protect and preserve habitats and species.

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Deforestation

Clearing of trees from an area, leading to habitat destruction.

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Genetic Engineering

Modification of an organism's genome to introduce desirable traits.

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Communicable Diseases

Illnesses that can be spread between individuals, caused by pathogens.

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ELISA

Enzyme-Linked Immunosorbent Assay, a test to detect pathogens in plants.

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Polymerase Chain Reaction (PCR)

Technique to amplify a small section of DNA for analysis.

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Observation in Plant Health

Involves assessing not only the appearance but also the tactile and olfactory aspects, e.g., stunted growth, presence of fungus.

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Non-Specific Defences

The immune system's general defense mechanisms to prevent pathogens from entering the body, including physical barriers like the skin and antimicrobial secretions.

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Specific Defences

Immune responses targeting specific pathogens, involving white blood cells producing antibodies and antitoxins to combat pathogens effectively.

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Monoclonal Antibodies

Identical antibodies produced from lymphocytes, used in various medical applications like pregnancy tests, cancer diagnosis, and treatment.

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Vaccines

Stimulate immunity against diseases by introducing a dead or weakened pathogen, aiding in preventing epidemics and providing immunity without causing illness.

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Antibiotics

Medicines that kill bacterial pathogens without harming body cells, contributing to the reduction of deaths from bacterial diseases.

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Antivirals

Medications used to stop viral replication, as viruses cannot be treated with antibiotics.

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Antiseptics

Chemicals that kill foreign microorganisms, commonly used to sterilize wounds and prevent infections.

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Aseptic Techniques

Procedures to prevent contamination of pure cultures, crucial for testing the effectiveness of antiseptics and antibiotics.

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Lifestyle Factors and NCDs

Lifestyle choices like diet, exercise, alcohol consumption, and smoking can influence the development of non-communicable diseases (NCDs) like cardiovascular diseases and diabetes.

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Coronary Artery Disease

A buildup of cholesterol in coronary arteries leading to fatty deposits, potentially causing a heart attack if untreated.

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Risk Factors for Cardiovascular Diseases

Factors like smoking, high blood pressure, high salt intake, and saturated fat consumption that increase the risk of heart diseases.

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Lifestyle Choices for CVD Prevention

Includes regular exercise, not smoking, weight loss, and reducing saturated fats in the diet to lower the risk of heart diseases.

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Statins

Drugs that lower blood cholesterol by reducing its production in the liver, prescribed for heart disease or high-risk individuals, with long-term use and potential side effects.

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Stents

Wire mesh tubes inserted into coronary arteries to keep them open for proper blood flow, typically made of metal alloys to prevent rejection.

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Cancer

Uncontrolled cell growth leading to tumours, which can be benign (grow slowly, don't spread) or malignant (grow quickly, spread to other parts).

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Risk Factors for Cancer

Include exposure to carcinogens, age-related mutations, genetic factors like BRCA1 gene, and lifestyle choices such as smoking and sun exposure.

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Stem Cells in Medicine

Versatile cells used to replace damaged cells, treat diseases like diabetes, multiple sclerosis, and leukaemia, with ethical concerns and potential for mutations.

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Gene Technology in Medicine

Involves genetic engineering for producing human insulin, treating inherited conditions by replacing faulty genes, and genetic testing for diseases like Huntington's.

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Human Genome Project

Project that enhanced understanding of human genes, disease prediction, and treatment effectiveness by targeting genomes.