Micro Life Notes

Notes – Activity Diseases can be caused by infectious agents, genes, environmental factors, lifestyle or a combination of these causes.

Notes – Activity Infectious diseases can spread rapidly through a population. 3. Data can be analyzed to determine trends and/or patterns.

Notes – Activity Disease is a breakdown in the structure or function of a living organism.

Notes – Activity A hypothesis is an explanation based on observed facts or an idea of how things work. New information may lead to a revision of a hypothesis.

Notes – Activity Analyzing trends in how a disease spreads can suggest ways of preventing its further spread.

Notes- Activity Epidemiologists track patterns of disease transmission in order to develop procedures to reduce the spread of disease.

Notes – Activity A carrier of a disease shows NO symptoms of the disease but can give (transmit) it to others.

Notes – Activity 32 Person Symptoms Disease Infected Carrier Not Infected

Notes – Activity Society sometimes responds to people with infectious diseases with fear, prejudice or cruelty.

Notes – Activity More complete knowledge of disease transmission has led to improved public health measures.

Notes – Activity Vectors are one way in which some infectious diseases are spread to humans.

Notes – Activity Making decisions about complex issues often involves trade offs (giving up one thing in favor of another).

Notes – Activity Hansen’s disease is one of the many diseases that have become rare in the United States due to the availability of effective drug treatments.

Notes – Activity Always carry a microscope using two hands, one under the base and one on the arm.

Notes – Activity Rotate the objectives carefully. Do not allow them to touch the stage or anything placed on the stage, such as the slide. This can damage the microscope.

Notes – Activity When using the coarse focus knob, turn so the body tube moves up SLOWLY!

Notes – Activity Use only lens paper to clean the eyepiece and objectives. 19. When you have finished using the microscope, remember to turn off the light and set the objectives back to low power (4x).

Notes – Activity The microscope can be used as a tool for investigation. 21. Microscopes reveal organisms that cannot be seen with the naked eye.

Notes – Activity Most infectious diseases are caused by microbes. 23. Life is composed of a variety of organisms that vary greatly in size.

Notes – Activity Cells of different organisms have some similar structures, such as the cell membrane. Other structures vary among cells.

Notes – Activity Viewing structures within the cell, like the nucleus, can be made easier by staining.

Notes – Activity Cells are alive. The function of living organisms, including respiration, are performed by cells.

Notes – Activity All living things are composed of microscopic units called cells.

Notes – Activity The function of the cell membrane is to control what can enter or leave the cell. Cell membranes are selective; some particles pass through but others can not.

Notes – Activity Creating models is one way to understand and communicate scientific information.

Notes – Activity The small size of cells increases the rate at which particles can cross the cell membrane.

Notes - Activity The cell membrane separates cytoplasm from its external (outside) environment. 32. The nuclear membrane protects the genetic material in the nucleus.

Notes – Activity Protists and bacteria are single-celled microbes.

Notes – Activity Characteristics that distinguish organisms include size, shape and structure.

Notes – Activity Differences between protists and bacteria include the presence or absence of a nucleus and size.

Notes – Activity The category of “microbes” includes microorganisms, such as bacteria and protists, and also viruses, which are not considered to be alive.

Notes – Activity Differences between protists, bacteria, and viruses include whether they are cells, the presence or absence of a nucleus and size.