8/12/2019 Gr5 Wk5 Active Passive Transport

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Cross-Curricular Reading Comprehension Worksheets: E5-of 36

v ng t ngs are ma e up o t ny un ts ca e ce s. ece s are surroun e y a cover ng ca e a mem rane . e

mem rane contro s w at moves n an out o t e ce .Cells need many kinds of materials in order to thrive. Theymust have water, oxygen, glucose (sugar), sodium, potassiumand a variety of other minerals. The body has to have a deliverysystem to get these materials where they need to go. In addition,every cell produces waste materials that it needs to get rid of.The body has to have a method of waste collection and disposal.Like a eet of trucks form a transport system to the pick up and

e ver goo s n t e wor , t e o y as a transport system, too.

There are two types of transport: act ve transport , anpass ve transport .ass ve transport s eas est or t e ce s ecause t ey on t

nee to use any energy to ma e t appen. us on s t esimplest and most common form of passive transport. Duringthe diffusion process, tiny particles of the materials that needto be delivered to the cells are spread through either a gas, likeoxygen, or a liquid, like water. Areas with high concentrations ofthe materials slowly diffuse them to areas of low concentration ofthe materials. Osmosis is a unique form of passive transport thatallows water to pass through the cell membrane but keeps mostot er mater a s out.

Active transport is used when the concentration of materialsns e t e ce s g , an t e ce nee s to pus mater a s outto areas o ow concentrat on o t e mater a s. n ortunate y,t s n o transport requ res t e ce to wor aga nst t e naturadirection of diffusion. This causes the cell use energy. Oneexample of this is how nerve cells work. They pump sodium outand pull potassium in. Although they must expend energy in this

process, doing so allows them to thrive.

Answer the following questions based on thereading passage. Dont forget to go back tothe passage whenever necessary to nd orcon rm your answers.

ross-Curr cular Focus: L e c enceName: ______________________________________ Act ve & Pass ve Transport

1) What is the covering around a cell called?

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2) How are active and passive transport different?

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3) What is osmosis?

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4) What comparison is made to help the reader of thispassage etter un erstan ow mater a s are movethroughout the body?

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ame one type o ce t at uses act ve transport.

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8/12/2019 Gr5 Wk5 Active Passive Transport

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