Fundamentals of Anatomy and Physiology

240 Chapter 10

Stimulus

(A)

1

1

2

(^)
1 2
(^)
1 2
(^)
1 2

2

2

1 2 2 1

2

1

1 2 1

1

2

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 1

2 1

(^)
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
2 11
(^2 1)
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 11 2 2 1
(^1 2 2 1)
(^1 2 2 1)
1 2 2 1
(^1 2 2)
(^1 2)
(^1 2)
(^1)

(B)

(^)
Area of action potential

1

1

2

(^)
1 2
(^)
traveling along neuron
2
1
1 2

2

2

2

1

Na^1 Na^1  1    2

1 2

1

2 1

1 2

2 1

1 2 2 2 2 2 1 1 1 1 1 1 1 1 2 2

1

2 1 1 1 1 1 2 2 2 2 2 2 2 2 2 1

(^1)
2 1 1 1 1 1 2 2 2 2 2 2 2 2
(^2 1)
2 2 1
1 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 (^1 2 2 1)
Na^1 Na^1 1 2
(^2 1)
1 2 2 1
1 2 2 1
(^1 2 2)
(^1 2)
(^1 2)
1
1

1

2

(^)
1 2
(^)
1 2
(^)
Area of repolarization^1 2 2 21
(^) Na (^1) Na (^1 1 2 2 1)
1 2 (^2 1)
1

2

2 1

(^)
1 1 1 1 1 2 2 2 2 2 2 2 1 2
2 2 2 2 2 2 1 1 1 1 1 2 2 1
2 1
(^)
K^1 K^1 Na^1 1
2 2 2 2 2 2 1 1 1 1 1 2
(^2 1)
2 2 1
1 1 1 1 1 2 2 2 2 2 2 2 1 1 2 2 1
Na^1 Na^1
(^1 2 2 1)
1 2 2 1
1 2 2 1
(^1 2 2)
(^1 2)
(C)
(^1 2)
(^1)
Figure 10- 6 The electrical distribution surrounding a nerve fiber and transmission of a nerve impulse.
(^) ®
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