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Life Science Midterm Review

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by

Takisha Toussaint

on 17 December 2013

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Transcript of Life Science Midterm Review

Nature Of Science
Scientific Process
Steps of the scientific process
Ask a question
Formulate a hypothesis
Conduct an experiment
Collect data
Analyze data
Draw conculsion
Scientific Theory
Cell Theory
Cellular Processes
Types of Cells
Eu
karyotic =
Nu
cleus
Pro
karyotic =
NO
nucleus
Organization
Atoms Molecules Cells Tissue


Organ Organ System Organism
Unicellular vs Multicellular
Unicellular
has one cell only,
multicellular
has multiple.
Unicellular
are usually smaller, less specialized, and
prokaryotic
;
multicellular
are usually larger, more specialized, and
eukaroyotic

Classification
Classification
Different types of living things are put into groups so that it's easier to classify them. This is called classification. The branch in Biology that is to do with classification is called 'taxonomy'. The people that study this are called taxonomist. In 1753, Carolus Linnaeus invented a new way or grouping and naming living things that scientis use today. They are put into 7 groups...
Human Body
Digestive/Excretory System
Digestive System: The digestive system breaks down food, absorbs nutrients and eliminates waste.
Excretory System
responsible for eliminating waste from the body
Skeletal/Muscular System
Repetition Vs Replication
Repetition: Occurs when multiple sets of measurements are made during one scientific investigation.
Replication occurs when a scientific investigation is reproduced by another person.
Scientific Name
Known as Binomial Nomenclature
made up of the Genus and species name
Life Science Midterm Review
Ready Or Not:
Here it comes! Clear your desks and take out a pencil
Independent Vs. Dependent Variables
Independent: What you can control or manipulate in an experiment

Dependent: The results as a reaction to the controlled or manipulated
Scientific theory is a proposed description, explanation or model of something occurring in nature. These theories have to be testable so that scientists can use the scientific method to see if they work.
Scientific evidence can either support or counter a theory. IF such evidence is found, a new theory may be proposed.
All living things are made up of cells.
Cells are the basic units of structure and function in living things.
Living cells only come from other living things.
The human body is the entire structure of a human organism. By the time it reaches adulthood, the body consists of close to 100 trillion cells.
Mouth
Beginning of the digestive system
Mechanical process: chewing
Chemical process: Saliva

Esophagus
Connects mouth to the stomach
Stomach
Mechanical digestion occurs from the smooth muscle of the stomach walls contract.
Chemical digestion occurs as the food mixes with digestive juices.
Small Intestine
Chemical digestion by substances produced by liver and pancreas.
Nutrients are absorbed by the villi.
Large Intestine
Water is absorbed here
Well...
We all know what happens next!!! Waste is eliminated through the rectum.
Digestive System
Parts of the Cell
The skeletal system is responsible for supporting the body, protecting internal organs, storing minerals, allowing movement and producing blood cells.
The muscular system produces movement, circulate blood and move blood through the digestive system.
The skeletal and muscular system work TOGETHER to help the body move.
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