Module 3: Cellular Extensions

Question 1

Cilia

Answer 1

• Generated by centrioles and
  made up mainly of microtubules
• Cellular extensions (stick out
  from cell surface)
• Shorter
• Move substances along cell
  surface
• Located on many human cells

Question 2

Flagella

Answer 2

• Generated by centrioles and
  made up mainly of microtubules
• Cellular extensions (stick out
  from cell surface)
• Longer
• Propel cell itself
• ONLY ONE in humans: sperm

Question 3

Microvilli

Answer 3

• Small, hair-like
• Increase surface area of plasma membrane/cell (A LOT!)
• Typical in absorbing cells (ie. GI tract)