Cells, tissues, organs and organ systems Flashcards
How many life processes does all organisms carry out?
Seven
What are the seven life processes?
Movement, reproduction, sensitivity, growth, respiration, excretion and nutrition
What is the function of the cell surface membrane?
It keeps cell together and controls what goes into and out of the cell?
What is the function of the nucleus?
It controls the cell
What is the function of the cytoplasm?
Where activities happen, including respiration (which occurs in the mitochondria)
What is the function of the chloroplast?
It contains chlorophyll to trap sunlight for photosynthesis
What is the function of the cell wall?
It is made of cellulose and provides support
What is the function of the vacuole?
Storage space
What is a microscope used for?
To magnify tiny things such as cells
How do you find out the total magnification?
Magnification of objective lens x magnification of eyepiece lens
The object you look at. What is this called?
A specimen. (It has to be thin to let light get through it)
What is the first step to use a microscope?
Place the smallest objective lens over the hole in the stage
What is the second step to use a microscope?
Turn the focusing wheel to move the objective lens close to the stage
What is the third step to use a microscope?
Place the slide on the stage
What is the fourth step to use a microscope?
Adjust the light source or mirror
What is the fifth step to use a microscope?
Look in to the eyepiece lens
What is the last and final step to use a microscope?
Turn the focusing wheel until what you see is in focus
What are the two specialised cells in animals?
Muscle cells and fat cells
What are the two specialised cells in plants?
Root hair cells and xylem cells
What is a function of muscle cells?
Muscle cells shape to move things
What is a function of fat cells?
Fat cells in animal store fat
What is a function of root hair cells?
Root hair cells take in water
What is a function of xylem cells?
Xylem cells carry water
A group of cells that are the same, all doing the same job, is called a________ (eg. muscle ______)
Tissue
A group of different tissues working together to do an important job is an ______
Organ
