Science Notebook - Student Edition

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Cellular Structure and Function 71

Name Date

Main Idea Details

Section 7.3 Structures and Organelles (continued)

Cytoplasm and Cytoskeleton

on page I found this information.

SE, pp. 191–192RE, p. 75

Cell Structures

on page I found this information.

SE, pp. 193–199RE, pp. 75–

Compareboxes. the cytoplasm and cytoskeleton by defining each in the

semifluid material inside the Cytoplasm Cytoskeleton

organelles or plasma membrane in which cell processes take

place directly

supporting network of long, thin protein fibers forming a

framework for the cell and providing an anchor for

organelles

Identifydescribed. the part of the cell that corresponds to each function

nucleus directs cell processes; contains the cell’s DNA; stores information for cell growth,

nuclear envelope function, and reproduction

double membrane that surrounds the nucleus

ribosome helps manufacture proteins

nucleolus produces ribosomes inside the nucleus

endoplasmic reticulumsite of ribosome attachment; can be smooth or rough

Golgi apparatus modifies, sorts, and packages proteins for transport outside the cell

vacuole membrane-bound storage area within the cell

lysosome vesicle that contains substances that digest excess or worn-out organelles

centriole structure near the nucleus that functions during cell division

mitochondrion converts fuel particles (sugars) into useable energy

chloroplast captures light energy and converts it to chemical energy through photosynthesis

cell wall gives support to plant cells

cilia and flagella projections that allow the cell to move or to move substances along the surface of

the cell

CellularStructureandFu

nction^69

Name

Date

oIfonpuangdethisinformation.

SE,REp,pp.p^18.^87 – 31 –^9704

Model theplasmamemb

rane.Labeleachpart,and

describethe

functionof thatpartin

detail.

Diaproteins,gramsandshould clearcholesterol.ly show and explain phospholipids,

phospholipids: polar phosphate hea

dsallow membranetointeract

with surface water; nonpolar tail

s are on insideof membr

ane and

makeit difficult for water-soluble

particles to move through the

membrane

transport proteins:regulate what is

allowed to enterand exit the

cell through the membr

ane

cholesterol: keeps phospho

lipidsfluid, preventsthem

from

sticking together

receptors: transmit signals

totheinside ofcells

Discuss howthetermsfl

uid andmosaic describet

heplasma

membrane.

Fluid: It is fluid because the phospholipids, prot

eins, and

cholesterol float in the

membrane.

Mosaic:It is a mosaic

because it has many parts.

The proteins

create patterns on the m

embrane’s surface.

Section 7.2 The Plasma Membrane

(continued)

Main^ Idea

Details

Analyze therole of thepla

smamembranein ma

intaining

homeostasis in thecell.

Accept all reasonable responses. As a select

ively permeable barrier between the

inside of the

cell and the outside environm

ent,the plasmamembrane controls the

amount ofsubstances

entering and leaving the cell and the tim

ing of substance flow.

(^) SUMMARIZE
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