Hypothesize what types of animals would have the fastest conduction velocitieds?

A larger nerve will have a faster conduction velocity. Hypothesize what types of animals would have the fastest conduction velocitites? Animals with larger axon diameter and myelination.

1. What types of animals would have the fastest conduction velocity?
2. What has the fastest conduction velocity?
3. What kinds of nerves have the highest conduction velocity?
4. What determines conduction velocity?
5. Which of the following neurons would have the fastest conduction speed?
6. Why is the MGF faster than the LGF?
7. Which Fibre has lowest conduction velocity?
8. Which will best increase the speed of action potentials?
9. Which of the following has the slowest conduction velocity?
10. Which fiber has fastest conduction?
11. What increases conduction velocity?
12. Is the nerve conduction velocity faster or slower in the lower extremity compared to the upper extremity?
13. What are the two main factors that determine conduction velocity in a neuron explain how each impacts conduction velocity?
14. What are the two main factors that determine conduction velocity in a neuron?
15. What determines action potential speed?

What types of animals would have the fastest conduction velocity?

1996, PMID 8807532 summary: "Giant nerve fibers of the shrimp family Penaeidae conduct impulses at the velocity highest among all animal species (~210m/s, highest in mammals=120m/s)." Although note, that for mammals, BNID 108973 Table - link top entry in table, gives value of 164m/sec for pyramidal tract in cat.

What has the fastest conduction velocity?

The fastest conduction velocity occurs in the largest diameter nerve fibres. This phenomenon has formed the basis for classifying mammalian nerve fibres into groups in order of decreasing diameter and decreasing conduction velocity. Another factor is the temperature of the nerve fibre.

What kinds of nerves have the highest conduction velocity?

Normal impulses in peripheral nerves of the legs travel at 40–45 m/s, and 50–65 m/s in peripheral nerves of the arms. Largely generalized, normal conduction velocities for any given nerve will be in the range of 50–60 m/s.

What determines conduction velocity?

The conduction velocity of the action potential is determined by measuring the distance traveled (length of the nerve in m) and dividing by the time (sec) taken to complete the reflex arc, also called the latency. Conduction velocity = distance (m)/time (sec). Measurement of distance is relatively straightforward.

Which of the following neurons would have the fastest conduction speed?

The fastest signals in our bodies are sent by larger, myelinated axons found in neurons that transmit the sense of touch or proprioception – 80-120 m/s (179-268 miles per hour).

Why is the MGF faster than the LGF?

The instructor can discuss how axonal diameter and myelination have specific electrical effects on how the spike travels down the axon (the MGF has a larger diameter than the LGF and thus has a faster conduction velocity).

Which Fibre has lowest conduction velocity?

Answer: The conduction velocity for the A-beta fibres is 13.9 mm/ms, compared to the 22.1 mm/ms conduction velocity of the A-alpha fibres.

Which will best increase the speed of action potentials?

The myelin sheath increases the speed of action potential conduction from the initial segment to the axon terminals.

Which of the following has the slowest conduction velocity?

The region between atrium and atrioventricular node has the slowest conduction velocity (. 05 M./see.)

Which fiber has fastest conduction?

Action potentials in C-nerve fibers travel only about 2.2 mph - slower than you can walk. A-delta nerve fibers can conduct action potentials as fast as a sprinter in the Olympics.

What increases conduction velocity?

Conduction velocity (CV) is increased in axons with thicker myelin sheaths, and the length of the nodal gap and distribution of Na⁺ channels in the node of Ranvier have a strong influence on the action potential firing threshold, frequency of firing, and CV (1).

Is the nerve conduction velocity faster or slower in the lower extremity compared to the upper extremity?

This is true for the same reasons that conduction velocity is faster in the arms than in the legs: (1) distal nerve segments are tapered and therefore conduct more slowly than proximal segments, and (2) distal limb segments are cooler than proximal segments and therefore conduct more slowly.

What are the two main factors that determine conduction velocity in a neuron explain how each impacts conduction velocity?

The primary factors that alter the conduction velocity of an action potential down an axon are the diameter of the axon and the insulation of the axon. These factors both affect velocity as they effect the number of ions that are present in the axon at a given time.

What are the two main factors that determine conduction velocity in a neuron?

The speed of neuron transmission generally depends upon two factors: axon size and degree of myelination.

What determines action potential speed?

1. Myelin sheath - This covers some of the nodes and acts as an electrical insulator where the action potential travels from one node of ranvier to the next by saltatory conduction. 2. Diameter of the axon - the larger the diameter of an axon increases the rate and speed of conductance as there is less leakage of ions.