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Terms in this set (24)
viruses not made up of cells. therefore viruses are not considered to be living T-F
flagella made up fo microbes help organize cell division t:f
cilia and flagella are made of protein filaments called endoplasmic reticulum t-f
Ribosomes that synthesize proteins are found on the smooth endoplasmic reticulum. t-f
plant cells have chloroplast but not mitochondria t-f
water and carbon dioxide oxygen and some other substances can pass through the cell wall t-f
Proteins called aquaporins are important to the movement of water through cell membranes. These proteins participate in active transport.
f passive transport facilitated diffusion and osmosis
Moving materials from an area of low concentration to an area of high concentration requires active transport. t-f
a cell is a multicellular organism must be able to carry out all of the functions necessary for life in order for the organism to survive t-f
fill in the blank. according to the cell theory all cells come from existing_________________
depending weather you have a _____________ unicellular organism are classified as either eukaryote or prokaryote
most of the time the cell genetic info is found as a threadlike ___________ in the cells nucleus
Cells that need to make a lot of protein are expected to have a large number of ________________.
the cells takes in food and water and eliminates wastes through its selectively permeable__________________
Molecules tend to move from an area where they are more concentrated to an area where they are less concentrated. This process is called
Large molecules, such as glucose, that cannot cross the lipid bilayer can still move across the membrane through a type of passive transport called_________________
Some materials can move across the cell membrane against a concentration gradient by
the cells in a multicellular organism have specific jobs. this is called_____________
a cells with relatively constant internal physical and chemical conditions are called__________________
Cells within a multicellular organism communicate by chemical signals. In order to receive and respond to a certain chemical signal, a cell must have a ________________ for that chemical.
two functions for a cytoskeleton
the cytoskeleton helps the cell maintain it shape and internal organization. it is also involved in many forms of cell movement
Explain, in terms of osmosis, why a raisin placed in a cup of pure water overnight will puff up with water.
because the concentration of the water in the rain water will flow from the cup into the rasin
How do facilitated diffusion and active transport differ? is osmosis an example of facilitated diffusion or active transport
facilitated diffusion involves the movement of the molecules across a membrane through protein channels. osmosis is a example of facilitated diffusion
Discuss the levels of organization in multicellular organisms and explain why these levels are not used to describe unicellular organisms.
the levels of organization in a multicellular organism include cells, tissues, organs, and organ system. unicellular organisms can't have cell specialization.
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