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47 Cards in this Set

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Stephen Fyler 7.1


The first scientist to describe living cells as seen through a simple microscope.
Stephen Fyler 7.1


Hooke
Stephen Fyler 7.1


Uses two or more glass lenses to magnify either living cells or prepared slides.
Stephen Fyler 7.1


compound light microscope
Stephen Fyler 7.1


A scientist who observed that cork was composed of tiny, hollow boxes that he called cells.
Stephen Fyler 7.1


van Leeuwenhoek
Stephen Fyler 7.1


A scientist who concluded that all plants are composed of cells.
Stephen Fyler 7.1


Schleiden
Stephen Fyler 7.1


A scientist who concluded that all animals are composed of cells.
Stephen Fyler 7.1


Schwann
Stephen Fyler 7.1


The microscope that allowed scientists to view molecules.
Stephen Fyler 7.1


electron microscope
Stephen Fyler 7.1


Organisms that have cells lacking internal membrane-bound strutures.
Stephen Fyler 7.1


prokaryotes
Stephen Fyler 7.1


Do not have a nucleus.
Stephen Fyler 7.1


prokaryotes
Stephen Fyler 7.1


Are either single-celled or made up of many cells.
Stephen Fyler 7.1


eukaryotes
Stephen Fyler 7.1


Generally are single-celled organisms.
Stephen Fyler 7.1


prokaryotes
Stephen Fyler 7.1


Organisms that have cells containing organelles.
Stephen Fyler 7.1


eukaryotes
Stephen Fyler 7.2


Living cells maintain __________ by controlling materials that enter and leave.
Stephen Fyler 7.2


balance
Stephen Fyler 7.2


Without this ability, the cell cannot maintain _________ and will die.
Stephen Fyler 7.2


homeostasis
Stephen Fyler 7.2


The cell must regulate internal concentrations of water, _______, and other nutrients and must eliminate waste products.
Stephen Fyler 7.2


glucose
Stephen Fyler 7.2


Homeostasis in a cell is maintained by the __________, which allows only certain particles to pass through and keeps other particles out.
Stephen Fyler 7.2


plasma membrane
Stephen Fyler 7.2


This property of a membrane is known as __________.
Stephen Fyler 7.2


selective permeability
Stephen Fyler 7.2


It allows different cells to carry on different activities within the same _________.
Stephen Fyler 7.2


organism
Stephen Fyler 7.2


The structure and properties of the cell wall allow the plasma membrane to be selective and maintain homeostasis.
Stephen Fyler 7.2


true
Stephen Fyler 7.2


The plasma membrane is a bilayer of lipid molecules with protein molecules embedded in it.
Stephen Fyler 7.2


true
Stephen Fyler 7.2


A phospholipid molecule has a nonpolar, water-insoluble head attached to a long polar, soluble tail.
Stephen Fyler 7.2


true
Stephen Fyler 7.2


The fluid mosaic model describes the plasma membrane as a structure that is liquid and very rigid.
Stephen Fyler 7.2


false - it is flexible
Stephen Fyler 7.2


Eukaryotic plasma membranes can contain cholesterol, which tends to make the membrane more stable.
Stephen Fyler 7.2


true
Stephen Fyler 7.2


Transport proteins span the cell membrane, allowing the selectively permeable membrane to regulate which molecules enter and leave a cell.
Stephen Fyler 7.2


true
Stephen Fyler 7.2


Proteins at the inner surface of the plasma membrane attach the membrane to the cell's support structure, making the cell rigid.
Stephen Fyler 7.2


false - it makes the cell flexible
Stephen Fyler 7.3


A membrane-bound, fluid-filled sac.
Stephen Fyler 7.3


plasma membrane
Stephen Fyler 7.3


Closely stacked, flattened membrane sacs.
Stephen Fyler 7.3


golgi apparatus
Stephen Fyler 7.3


The sites of protein synthesis
Stephen Fyler 7.3


ribosomes
Stephen Fyler 7.3


A folded membrane that forms a network of interconnected compartments in the cytoplasm.
Stephen Fyler 7.3


endoplasmic reticulum (ER)
Stephen Fyler 7.3


The clear fluid inside the cell.
Stephen Fyler 7.3


cytoplasm
Stephen Fyler 7.3


Organelle that manages cell functions in eukaryotic cell.
Stephen Fyler 7.3


nucleus
Stephen Fyler 7.3


Contains chlorophyll, a green pigment that traps energy from sunlight and gives plants their green color.
Stephen Fyler 7.3


chloroplast
Stephen Fyler 7.3


Digest excess or worn-out cell parts, food particles, and invading viruses or bacteria.
Stephen Fyler 7.3


lysosomes
Stephen Fyler 7.3


Small bumps located on the endoplasmic reticulum.
Stephen Fyler 7.3


ribosomes
Stephen Fyler 7.3


Provides temporary storage of food, enzymes, and waste products.
Stephen Fyler 7.3


vacuoles
Stephen Fyler 7.3


Firm, protective structure that gives the cell its shape in plants, fungi, most bacteria, and some protists.
Stephen Fyler 7.3


cell wall
Stephen Fyler 7.3


Produce a usable form of energy for the cell.
Stephen Fyler 7.3


mitochondria
Stephen Fyler 7.3


Modifies proteins chemcially, then repackages them.
Stephen Fyler 7.3


golgi apparatus
Stephen Fyler 7.3


contains inner membranes arranged in stacks of membranous sacs called grana.
Stephen Fyler 7.3


thylakoid membrane
Stephen Fyler 7.3


Plant organelles that store starches or lipids or that contain pigments.
Stephen Fyler 7.3


plastids
Stephen Fyler 7.3


Cells have a support structure within the *cytoplasm* called the cytoskeleton.
Stephen Fyler 7.3


true
Stephen Fyler 7.3


The *exoskeleton* is composed of thin, fibrous elements that form a framework for the cell.
Stephen Fyler 7.3


false - cytoskeleton
Stephen Fyler 7.3


*Microtubles* of the cytoskeleton are thin, hollow cylinders made of protein.
Stephen Fyler 7.3


true
Stephen Fyler 7.3


Cilia and flagella are cell surface structures that are adapted for *respiration*.
Stephen Fyler 7.3


false - locomotion or feeding
Stephen Fyler 7.3


*Flagella* are short, numerous, hairlike projections from the plasma membrane.
Stephen Fyler 7.3


false - cilia
Stephen Fyler 7.3


Flagella are longer and *more* numerous than cilia.
Stephen Fyler 7.3


false - less
Stephen Fyler 7.3


In *multicellular* organisms, cilia and flagella are the major means of locomotion.
Stephen Fyler 7.3


false - unicellular
Stephen Fyler 7.3


In *prokaryotic* cells, both cilia and flagella are composed of microtubules.
Stephen Fyler 7.3


false - eukaryotic