3.2d Cell Extensions

What is the major role of microvilli?

• Increase cell's surface area

• Propel the cell itself

• Form the lysosomes of the cell membrane

• Stiffen the cytoskeleton of the cell

True or False: Cilia's purpose is to move substances across the cell membrane.

• True

• False

Tags

NGSS.MS-LS1-2

What stiffens the microvillus?

• A core of actin filaments extending into the internal cytoskeleton of the cell

• They increase the cell's surface area

• There are centrioles at the base therefore making it stronger.

• Microtubules surround it giving it support as it extends into the cell membrane

Fingerlike extensions of the plasma membrane that project from an exposed cell surface and form alcoves.

• cilia

• flagella

• microvilli

• all of the above

Since microvilli extend the surface area of the cell, what type of activity are they usually active?

• transport across the cell membrane

• absorption

• locomotion of the cell itself

• all of the above

What is the major role of flagella?

• transport through the cell membrane

• transport across the cell surface

• locomotion of the cell

• all of the above

Tags

NGSS.MS-LS1-2

Microtubules and centrioles are involved when a cell is about to make

• cilia

• microvilli

• psuedopods

• lysosomes

Which cell extensions action is described as "crowd surfing"?

• microivilli

• flagella

• microtubules

• cilia

Which type of extensions are typical of the lining of the respiratory system?

• flagella

• microvilli

• cilia

• microtubules