Biology Courses
The study of modern biology began to develop with the dramatic improvement of the microscope, enabling the discovery of spermatozoa, bacteria, and the diversity of microscopic life. Beyond cellular biology, the field contains several broad subcategories including DNA research, genetics, human physiology, and ecology. Early experiments pointed to DNA as the component that carries genes. A chromosome is a highly-organized structure consisting of DNA and histones, while genes are the primary units of inheritance, corresponding to a region of DNA that influences the form or function of an organism. A focus on new organisms such as viruses, along with the discovery of the double-helical structure of DNA, marked the transition to molecular genetics. Cells transcribe a DNA gene into an RNA version of the gene, and a ribosome then translates the RNA into a protein, a sequence of amino acids.
Biotechnology uses the DNA of living organisms to bioengineer new products artificially. Depending on the tools and applications, it often overlaps with the related fields of biomedicine, pharmacology, and genetic engineering. Modern biotech methods are used to manufacture existing medicines more easily, in order to treat human diseases. Further, biotechnology has enabled emerging techniques like gene therapy. Stem cell research offers new hope in the areas of cancer treatment as well as life extension. The regulation of genetic engineering aims to assess and manage the risks of developing genetically modified organisms (GMO), including commercial food crops and fish. Although mired in ethical debate, the fast-growing field of biotech offers many employment opportunities.
At the smallest scale, mechanical engineering becomes nanotechnology, one goal of which is to build molecules and materials via micro-synthesis. Current areas of mechanical engineering research in nanotechnology include nanofilters, nanofilms, and nanostructures such as microtubules. Self-assembly of these structures may lead to new breakthroughs in artificial tissue generation. Micron-scale mechanical components such as springs, gears, and heat-transfer devices are fabricated from a variety of substrate materials such as silicon, glass and polymers like SU8. Biomechanics applies traditional engineering methodology to the analysis of biological systems. By copying the efficiency of nature, the study of biomechanics aids in creating prosthetic limbs and artificial organs for medical application.From a macro perspective, ecology studies the distribution and habitat of living organisms, as well as the interactions between individual organisms and their environment. A microscopic bacterium in a localized sugar gradient is responding to its environment as much as a lion searching for food in the African savanna. For any species, behaviors can be co-operative, competitive, parasitic, or symbiotic in nature. Ecological systems may be studied at several different levels, from individuals and populations to ecosystems and the biosphere.
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Anatomy & Physiology Basic Human Anatomy Human Skeleton and Bones Muscles Intro to Circulatory System Circulatory Diseases Intro to Respiratory System Respiratory Diseases Intro to Endocrine System Gastrointestinal System Lymphatic System Renal System The Lungs Gas Exchange Red Blood Cells Clotting The Heart Arteries Veins Nervous System Brain Organization Neurotransmitters Spinal Cord Neurons Muscle Cells Kidneys Urinary System Water Homeostasis Protein Transport Lymphatic System Eye Function Retina Focal Distance Hearing Digestion Intestines Elimination Epidermis (skin) Thermoregulation Reproduction Pregnancy Fetal Development Cell Division |
Cell Biology Cell Structure Microbiology Osmosis Nuclei Membrane Transport Cellular Respiration Adenosine Triphosphate (ATP) ATP Hydrolysis Glycolysis Photosynthesis Krebs Cycle Calvin Cycle Immunology Phagocytes immune system B Lymphocytes (B cells) Stem Cells Cancer Molecular Biology DNA, RNA replication Human Genome Project Transcription Chromosomes Genetics Conservation Ecosystems Climate Change Forestry Genetically Modified Crops Pesticides Bee Colony Disorder Livestock Additives Marine Biology Food Chain Ocean Circulation Intertidal Zone Rivers |
Biology Practice Tests
Each of the following multiple-choice biology tests has 10 questions. No sign-up is required, just straight to the test.Anatomy Courses Online
Basic Human AnatomyHuman Skeleton and Bones
Muscles
Intro to Circulatory System
Circulatory Diseases
Intro to Respiratory System
Respiratory Diseases
Intro to Endocrine System
Gastrointestinal System
Lymphatic System
Renal System
Free Biology Courses Online
Intro to Biology – A brief introduction to the field of biology by Khan Academy.
Cell Structure – Cell structure, prokaryotic cells, eukaryotic cells, plasma membrane, cytoplasm, nucleus and ribosomes, endoplasmic reticulum and golgi bodies, mitochondria, chloroplasts, peroxisomes, cytoskeleton, extracellular matrix, cell walls, cell junctions.
Membrane Transport – Fluid mosaic model, diffusion, osmosis, plasma membrane, concentration gradients, selective permeability, facilitated diffusion, passive transport, active transport, sodium potassium pump, electrochemical gradients, immune cells, membrane, endocytosis, phagocytosis, exocytosis.
Cellular Respiration – ATP: Adenosine triphosphate, ATP hydrolysis, Oxidation and reduction, redox reactions, fermentation, cellular respiration, Glycolysis.
Cellular Biology – Fertilization, sperm, eggs, gametes, zygotes, germ cells, chromosomes, chromatids, cell division, phases of mitosis, meiosis, cell cycle regulation, cancer, and stem cells.
Biology & Medical Jobs – Listings
Healthcare jobs such as Registered Nurses, LPN’s, LVN’s and related Medical Technicians provide over 15 million jobs, and ten of the 20 fastest growing occupations are healthcare-related. Most healthcare workers have jobs that require less than 4 years of college education, such as health technologists and technicians, medical records, billing and coding, health information technicians, diagnostic medical sonographers, radiologic technologists and technicians, and dental hygienists. As people age they have more medical problems, and hospitals will require more staff. Wages vary by the employer and area of the county. Aside from their salary, most medical jobs include excellent benefits, as well as retirement plans.| Links below list current openings: | Starting Salary (up to) |
10 Year Salary (up to) |
| Diagnostic Medical Sonographers | $41,090 | $58,520 |
| Dietitians | $34,450 | $53,250 |
| Emt, Paramedic Jobs | $39,390 | $65,280 |
| Fitness Trainers | $31,710 | $46,750 |
| Home Health Aides | $33,100 | $57,030 |
| Licensed Vocational Nurses (LVN) | $44,480 | $66,780 |
| Massage Therapist Jobs | $33,000 | $52,670 |
| Medical Assistants | $28,980 | $37,140 |
| Medical Lab Technicians | $30,550 | $49,260 |
| Mental Health | $34,550 | $48,370 |
| Nursing | $47,760 | $68,130 |
| Occupational Therapists | $66,010 | $87,330 |
| Physical Therapist Assistants | $41,410 | $56,220 |
| Physical Therapists | $65,050 | $94,810 |
| Physician Assistants | $41,270 | $57,230 |
| Psychologists | $60,360 | $77,840 |
| Public Health | $52,250 | $72,250 |
| Radiation Therapists | $47,580 | $62,110 |
| Radiologic Technicians | $52,110 | $71,160 |
| Registered Nurses (RN) | $59,730 | $83,440 |
| Rehabilitation | $49,350 | $62,940 |
| Respiratory Therapy Technicians | $39,860 | $56,220 |
| Skin Care Specialists | $25,300 | $48,510 |
| Surgical Technologists | $45,680 | $67,630 |
| Medical Jobs (updated hourly) | Starting (up to) |
| Dental Hygienists | $30,430 |
| EMT, Paramedics | $39,390 |
| Fitness Trainers | $31,710 |
| Licensed Vocational Nurses (LVN) | $44,480 |
| Massage Therapists | $33,000 |
| Medical Assistants | $28,980 |
| Medical Lab Technicians | $30,550 |
| Mental Health | $34,550 |
| Nursing | $47,760 |
| Occupational Therapists | $66,010 |
| Physical Therapists | $65,050 |
| Physician Assistants | $41,270 |
| Public Health | $52,250 |
| Radiologic Technicians | $52,110 |
| Registered Nurses (RN) | $59,730 |
| Rehabilitation | $49,350 |
| Respiratory Therapy Technician | $39,860 |
| Surgical Technologists | $45,680 |
| Ultrasound | $41,090 |
Tag Cloud
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Radiology employment prospects
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