Table of Contents
What part of the muscle contracts in an all or none fashion?
Which of the dollwoing contract in an all or none fashion? Whole muscle or Single muscle fiber.
Does smooth muscle respond in all or none fashion?
B) has slow waves of depolarization and repolarization. Visceral smooth muscle does not respond in a all-or-none fashion to action potentials, a series of action potentials may result in only one contraction.
How does a whole muscle contract?
When an action potential travels down the motor neuron, it will result in a contraction of all of the muscle fibers associated with that motor neuron. The contraction generated by a single action potential is called a muscle twitch.
Does all muscle contract?
A muscle fiber either contracts fully or it doesn’t contract at all. The number of fibers that contract determines the strength of the muscular force. When more fibers contract at the same time, the force is greater.
What is an all or nothing response?
The all-or-none law is a principle that states that the strength of a response of a nerve cell or muscle fiber is not dependent upon the strength of the stimulus. Essentially, there will either be a full response or there will be no response at all for an individual neuron or muscle fiber.
What is referred to as an all or nothing event?
Action potentials are considered an “all-or nothing” event, in that, once the threshold potential is reached, the neuron always completely depolarizes. Once depolarization is complete, the cell must now “reset” its membrane voltage back to the resting potential.
Which type of muscle tissue is Autorhythmic?
Cardiac and most smooth muscles are autorhythmic-they are capable of contracting spontaneously without nervous or hormonal stimulation.
What does none response mean?
oxford. views 1,428,169 updated. all-or-none response A type of response that may be either complete and of full intensity or totally absent, depending on the strength of the stimulus; there is no partial response.
Why are action potentials all or none?
The action potential is said to be all-or-nothing because it occurs only for sufficiently large depolarizing stimuli, and because its form is largely independent of the stimulus for suprathreshold stimuli. In some neurons, a single action potential can be induced by the offset of a hyperpolarizing stimulus (Fig.