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Cells
cells and their functions
16
Science
7th Grade
04/28/2015

Additional Science Flashcards

 


 

Cards

Term
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Definition

Cell membrane

a double-layered membrane that surrounds the cell. Also called the plasma membrane, it regulates what enters and leaves the cell.

 

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Centriole

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a bundle of microtubules that helps organize the movement of chromosomes during cell division.

 

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Cytoplasm

a jelly-like substance, composed mainly of water, occupying most of the space between the cell membrane and the nucleus.

 

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Vacuole

a type of vesicle that stores water, nutrients, and other chemicals. The large vacuole found in plant cells helps the cells maintain their shape.

 

 

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Nucleus

a round body in the center of the cell that contains DNA and directs the cell’s activities.

 

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Endoplasmic reticulum

a network of passageways in which chemical compounds are manufactured, processed, and transported.

 

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Nucleolus

a small body in the nucleus where ribosomes are synthesized.

 

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Ribosome

tiny structure where proteins are synthesized.

 

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Lysosome

a small sac, or vesicle, that contains digestive chemicals.

 

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Vesicle

small, sac-like package of nutrients, proteins, or water created by the Golgi apparatus. Types of vesicles include vacuoles and lysosomes.

 

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Mitochondria

organelles that, using oxygen, convert nutrients into energy that can be used by the cell.

 

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Golgi apparatus

a stack of membranes that collects, modifies, and packages chemical compounds. 

 

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Nuclear membrane

a double-layered membrane that surrounds and protects the nucleus.

 

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Plastid

small structure that can store food (leucoplast) or pigment (chromoplast).

 

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Cell wall

the rigid, porous outer layer of a plant cell.

 

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Chloroplast

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an organelle that converts the radiant energy of the Sun into chemical energy through the process of photosynthesis.

 

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