Module 23 - Excitable Cells of plants and microbes

Question 1

In the excitable tissues of the Venus flytrap, action potentials are transmitted via:

Answer 1

Plasmodesmata

Question 2

The Dancer mutant of Paramecium generates enhanced voltage gated calcium currents. The consequence of this mutation is that Dancer:

Answer 2

reverses in response to weaker stimuli than wild type

Question 3

The motor protein responsible for movement of a cilium is:

Answer 3

dynein

Question 4

Some plants use excitable cells to make rapid movements. This behaviour can allow them to:

Answer 4

Protect from damage

Question 5

Which is thought to be the order (earliest to latest) in which voltage gated ion channels evolved?

Answer 5

Potassium, calcium, sodium

Question 6

The depolarisation phase of action potentials in Paramecium is based around which ion?

Answer 6

Ca2+