Flagellum Structure/Function

What are the three main parts of the flagellum?

1) Basal Body 2) Hook 3) Filament

The basal part of the flagellum has two functions what are they?

1) anchor 2) Electric motor

The prokaryotic flagellum’s mechanism of movement is _______.

rotation

The filament’s rotation ______ the cell through its environment.

propels

Some cells move in response to some sort of chemical stimulus. This is called what?

Chemotaxis

Chemotaxis can be ______ and _______. The cell can move away from a bad chemical and be drawn in by a desired one (i.e. glucose).

positive, negative

Most cell motility is driven by __________.

chemotaxis

Cells move by way of ____ and _______.

runs, tumbles

The MOVEMENT in some direction by way of flagella is the ___.

run

The CHANGE IN DIRECTION by way of flagella is called a ______.

tumble

Runs and tumbles are ______ movements done over and over again by cells without a stimulus.

random

Prokaryotes have ________ on their cellular surface that sense nutrients and can sense the concentration getting higher with movement (enables true change in position).

receptors

To ensure change in position, to reach area higher in nutrients during chemotaxis, the cell increases ___ between _______.

runs, tumbles

What differentiates random movements (runs and tumbles) from intentional movements (chemotaxis, negative or positive)?

runs get longer

What is the flagella of Spirochetes called?

Axial filaments

Axial filaments _____ around the cell of spirochetes rather than being attached to the outside.

wrap

Axial filaments are _________ the outermost layer of spirochetes.

underneath

What is the layer underneath the outermost layer of spirochete cells where axial filaments reside called?

periplasm

Axial filaments do not act like a ________; instead as the filaments spin it makes the ______ cell spin around acting like a corkscrew.

propeller, entire