Reflex action (& reflex arc) | Control & Coordination | Biology | Khan Academy

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ANSWERS: 1) reflex action are basically involuntary action that are Done after a sudden change in our environment basically called Stimulus that is harmful for our survival . 2) a reflex arc is the connection of sensory, Neurons Relay neurons and motor neurons and The stretching back of hand After stimulus. An arc like structure is obtained So it's called reflex arc 3)Sensory neurons - these are those neurons which converts the stimulus into electric impulses and sends them to spinal cord Relay Neurons- these are basically the connection between sensory and motor neurons . The neuron that connects sensory with motor neurones are called relay neurons Motor neurones- these are those neurons which carry information To biseps muscles to contract for our survival . 4) diagram made in Notebook 👍 OP explaination 🙂

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Revise

[@kookbaring4328]

Umm...actually it is not necessary that motor neurons must connect to the biscep only..u can define'em as Those neurons that are connected with the effector muscle and yeah you can give example of the biscep muscle☺ WAS JUST TRYNA CORRECT THE MISTAKE ..NOT OFFENDING☺ ANYWAYS THANK YOU FOR THE DEFINITIONS🙇

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This has to be one of the best teachings on reflexes and reflex arc. Clear and extremely easy to picture afterwards. Too good🔥✨

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For the first time I found the reflex arc so interesting and in 10 minutes I understood everything. Thank you!

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Thank-you so much before i got this video I thought reflex action and reflex arc is very difficult topic but after watching this now am able to explain whole pathway orally... So thankyou for making this video

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So this is me thinking that the reflex Arc is a complicated twisted palava, But khanAcademy sure knows how to simplify learning. Thank you!

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Wow .The change in the environment of the body is called stimulus

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[@harmeetangelsinghsingh6756]

Reflex action - In voluntary response to a stimulus Reflex arc It is a path which includes the sensory ,relay and motor neurons . Sensory neuron - send messages from sense organs to spinal cord Relay - connects the sensory and motor neuron. Transfers the electric signals from sensory to motor neuron Motor Neuron - carry messages back from spinal cord to other muscles as well as glands.

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[@loramudratripathy4666]

1.Reflex action are involntary action controlled by the spinal cord without involvement of brain . 2. Reflex arc is a method having one sensary neuron, Reray neuron and motor neuron. 3.sensary neuron- Transmit impulses to spinal cord. Reray neuron- it connect sasary neuron to motor neuron. Motor neuron- Transmit impulses to sensary organ. 4. Diagram done in my note copy.

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Fact : 1. reflex action evolved before intelligence is evolved . This is new to me .

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Knee jerk reflex does Involve 3 neurons along with the 2 u mentioned interneuron / Relay neuron is also present it's given in the ncert

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