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| Smallest unit of structure and function |
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| a thin covering which forms the outer boundary of the cell; keeps the cell intact; selectively permeable |
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| semi-liquid material which makes up the cell; found between cell membrane and nucleus; where chemical reactions take place |
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| the control center of the cell; contains chromosomes, contains the nucleolous, bound by a double-layer nuclear membrane |
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| Intracellular structures that have specific functions |
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| allow lipid-soluable materials to enter or leave the cell by diffusion through the cell membrane |
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| decreases the fluidity of the membrane, making it more stable |
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| some form pores to permit passage of materials, some are carrier enyzymes which help substances enter the cell, some are markers to identify cells, some serve as receptor sites so hormones can bond to trigger chemical reactions |
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| What is the structure of DNA? |
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| in the chromosomes in the nucleus of the cell |
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| network of membranous tubules, extend from nuclear membrane to cell membrane, passageway to transport materials for cell function |
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Small structures made of protein and ribosomal RNA.
Some found on surface of Rough ER. Some float freely in cytoplasm
Site of protein synthesis. |
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Series of flat membranous sacs.
Synthesize carbohydrates.
Secrete materials from cells. |
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Oval or spherical organelles.
Inner folds called "Cristae."
Site of ATP (energy) production. |
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Single membrane structures.
Contain digestive enzymes.
Digests bacteria, worn-out cell parts and dead cells. |
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A pair of rod-shaped structures, perpendicular to each other.
Organize spindle fibers during cell division. |
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Definition
mobile thread-like projections throughout the cell membrane.
Beat in unison to sweep material across the cell surface.
*Fallopian tubes have ________ to sweep egg cells to the uterus. |
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Mobile thread-like projections throughout the cell membrane.
Provides movement for sperm cells (only human cell with _________). |
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| Some proteins form _________ to permit passage of materials |
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Definition
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| Some proteins serve as ___________ __________ so hormones can bond to trigger chemical reactions |
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Definition
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| Endoplasmic Reticulum is a ________ to transport materials for _________ __________ |
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Definition
| passageway, cell function |
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| Ribosomes are the site of __________ synthesis |
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| Golgi Apparatus synthesizes ____________ |
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| Mitochondria is the site of ________ (________) production |
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| Lysosomes contain __________ enzymes |
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| Centrioles organize ________ fibers during _________ _________ |
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