IB Biology Topic C3.1.8 Nerves as Bundles of Nerve Fibres of Both Sensory and Motor Neurons Revision Notes (SL/HL)

IB Biology Topic C3.1.8 Nerves as Bundles of Nerve Fibres of Both Sensory and Motor Neurons Revision Notes (SL/HL) | RevisionDojo

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Nerves Are Bundles of Fibres That Carry Signals Across the Body

A nerve is a bundle of nerve fibres wrapped in protective connective tissue.
The fibres are the long extensions of neurons, the cells that carry communication through the nervous system.

Definition

Nerve

A bundle of axons that transmits electrical signals between the CNS and the body.

Myelination Sets the Speed of a Nerve Fibre

Myelinated fibres: wrapped in a myelin sheath that acts as an insulator.
1. They transmit impulses rapidly by saltatory conduction, where the impulse jumps between gaps in the sheath.
Unmyelinated fibres: have no myelin sheath.
1. They transmit impulses more slowly.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Nerves Are Bundles of Fibres That Carry Signals Across the Body

A nerve is a bundle of nerve fibres wrapped in protective connective tissue.
The fibres are the long extensions of neurons, the cells that carry communication through the nervous system.

Definition

Nerve

A bundle of axons that transmits electrical signals between the CNS and the body.

Myelination Sets the Speed of a Nerve Fibre

Myelinated fibres: wrapped in a myelin sheath that acts as an insulator.
1. They transmit impulses rapidly by saltatory conduction, where the impulse jumps between gaps in the sheath.
Unmyelinated fibres: have no myelin sheath.
1. They transmit impulses more slowly.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic C3.1.8: Nerves as Bundles of Nerve Fibres of Both Sensory and Motor Neurons Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Nerves Are Bundles of Fibres That Carry Signals Across the Body

Myelination Sets the Speed of a Nerve Fibre

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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Nerves Are Bundles of Fibres That Carry Signals Across the Body

Myelination Sets the Speed of a Nerve Fibre

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account