Which of the Following Can Shorten the Conduction Time of Action

question 43

Multiple Choice

Which of the following can shorten the conduction time of action potential through the atrioventricular (AV) node?

• A)Parasympathetic nervous system
• B)Catecholamines
• C)Vagal stimulation
• D)Sinoatrial node (SA)

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Definitions:

Eardrum

A slim barrier that divides the external ear from the internal ear and oscillates when influenced by sound vibrations.

Middle Ear

The part of the ear that contains three small bones (the hammer, anvil, and stirrup) that transmit sound vibrations from the eardrum to the inner ear.

Outer Ear

The outermost part of the ear, consisting of the pinna and the external auditory canal.

Middle Ear

The section of the ear between the eardrum and the oval window that amplifies sound waves through the ossicles to the inner ear.