Flashcards in Cells Deck (33)
Name three different types of organs in our bodies.
Lung organ, the brain and the ovaries.
Name three types of cells in our bodies.
Epithelial lung cells, reproductive cells and nerve cells.
Name two systems that these organs and cells are a part of.
Respiratory system and the reproductive system.
Name some types of microscopes.
Compound light microscope, the electron miscroscope, the Stereo microscope and the Scanning microscope.
What does a compound light microscope do?
Is used to view thin specimens mounted on a slide. The specimens need to be thin so that light is allowed to pass through them to form 2D images.
What does an electron microscope do?
They use a stream of electrons to produce an image.
What does a Stereo microscope do?
They are used to view living or non living specimens. They provide an enlarges 3D image as light does not to be passed through them so do not need to be thin.
What does a scanning microscope do?
They pass electrons over the surface of a specimen to give a 3D image.
What does a transmission electron microscope do?
They pass electrons through a thing specimen to produce a cross sectional image.
What is a cell wall?
A thick, rigid layer that surrounds the plant cell and provides support and structure.
What is the cell membrane?
A barrier that surrounds the cell and controls the transport of materials into and out of the cell.
What is a vacuole?
A large, fluid-filled space in a plant cell that helps keep its shape as well as storing nutrients.
What is the nucleus?
Acts as the central storage area for genomic DNA.
What is cytoplasm?
Fluid that fills the cell and suspends the various organelles.
What is the mitochondria?
THE POWER HOUSE OF A CELL!!! It produces energy to fuel the cell's activities.
What is the chloroplast?
The food producer in a plant cell. It converts the light from the sun into energy using photosynthesis.
What is respiration?
The process of which glucose + oxygen is turned into carbon dioxide and energy and water.
What do the roots of a cell do?
They absorb water from the ground.
What does the xylem cell do?
It carries the water to the leaves from the roots.
What does the phloem cell do?
It carries food from the leaf to all parts of the plant.
What does the stomate cell do?
Allows O2/CO2/H2O in and out of the plant.
How do unicellular organisms reproduce?
Using binary fission.
What is binary fission?
Cells divide into two, increasing the number of unicellular organisms and each is identical genetically.
How do multicellular organisms reproduce?
What are all living things made up of?
Draw a diagram that describes asexual reproduction.
What is the word equation for photosynthesis?
Carbon dioxide+ water - food + oxygen
Describe some differences between plant and animal cells
Plant cells: tend to be larger and more regular in shape, are enclosed by a rigid cell wall, contain a vacuole and chloroplast.
Animal cells: have many different shapes and sizes, are enclosed by a cell membrane.
How does one calculate the total magnification on a microscope?
Eyepiece magnification x object lens magnification