QUESTION 1 How do axons in invertebrates increase transmission speed of action p

Question

QUESTION 1

How do axons in invertebrates increase transmission speed of action potentials

increase diameter of axon

myelenate axons

faster voltage-gated sodium channels

faster refractory periods

1 points   

QUESTION 2

The lateral giant fiber is the largest giant axon fiber in the earthworm.

True

False

1 points   

QUESTION 3

Our lab procedure involves recording voltage differences between an intracellular electrode and an extracellular electrode.

True

False

1 points   

QUESTION 4

In the earthworm, the median and lateral fibers conduct their naturally generated impulses in opposite directions. What does the natural stimulation of the median giant fiber result in?  

rapid head withdrawal

rapid tail withdrawal.

depends on force applied

either direction depending on where the threat is

0.5 points   

QUESTION 5

The period in the action potential cycle when  it is impossible to initiate a second action potential is called the absolute _______________ period.

0.5 points   

QUESTION 6

Annelids are chordates.

True

False

0.5 points   

QUESTION 7

Nerve fibers in earthworms conduct impulses in either direction with equal facility.

True

False

increase diameter of axon

myelenate axons

faster voltage-gated sodium channels

faster refractory periods

Explanation / Answer

1.myelenate axons.

2. False.

Median giant fiber is the largest.

3. True.

4. A. rapid head withdrawal.

5. Absolute refractory period.

6. False.

Annelids are non chordates .

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