Locomotion

Note DAT Down!

Axopodia

• Needle-like projections used by some protozoans for locomotion

• Can be used to capture food

Cilia

• Movement of fluids and substances (motile)

• Sensory receptors and involved in cell signaling (primary)

Flagella

• locomotion of cell or fluids

• made of microtubules

• sperm tail = long flagellum

Microvilli

• Increase surface area for absorption

• primarily in the small intestine

  • located on surface of villi

Pili

• Hair-like structures used for attachment or genetic exchange between bacteria (sex pili)

• can facilitate movement via “twitching”

• can help attach bacteria to surfaces

• biofilm formation

Pseudopodia

• temporary locomotion by extension of amoeboid cell’s cytoplasm

• can be used to engulf food via phagocytosis

  • creates temporary vacuole of digestion

Stereocilia

• Increase surface area for absorption and secretion

• Convert sound into electrical signals (ear)

  • Detect movement and changes in position

Villi

• Increase surface area for absorption

• primarily in the small intestine

• facilitate nutrient exchange between the mother and fetus

  • chorionic villi in placenta