Chapter 10.2 Adaptive Quizzing

Which cytoskeletal elements is/are associated with supporting the movement of materials inside the cell?

both microtubules and microfilaments

Which of the cytoskeletal elements is/are capable of assembling and disassembling in the cell?

Microtubules and microfilaments

Could melanin granules be moved by dynein and kinesin along an actin microfilament?

No, these motor proteins are specific to microtubules and cannot move along microfilaments.

Metastatic cancer cells have a dynamic actin cytoskeleton associated with their cell membrane. The presence of the membrane cytoskeleton most likely accounts for:

the ability of these cells to move and crawl to new locations in the body.

In nerve cells, the centrosome is located near the nucleus. Vesicles move from near the nucleus to the end of long extensions (axons) along microtubules. Based on these two facts, it is possible to conclude that these vesicles are moving in the _____ direction on the microtubule using the motor protein _____. Click to view full size.

plus end; kinesin

Macrophage cells undergo a process called phagocytosis in which material is brought into a cell in the form of membrane vesicles and then transported along microtubules toward the cell center. Assuming that the centrosome is near the cell center, you can predict that these vesicles are moving to the _____ of microtubules using the motor protein _____.

minus end; dynein