EVERYDAY SCIENCE

SCIENCE

NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which type of movements occur without participation of brain?
A
Cranial reflexes
B
Afferent reflexes
C
Efferent reflexes
D
Spinal reflexes
Explanation: 

Detailed explanation-1: -A monosynaptic reflex is, typically, a reflex that does not involve the brain. See Figure 2. There is no association neuron in the spinal cord; therefore, information does not go to the brain. An example of a monosynaptic reflex is the patellar reflex, sometimes called the kneeā€jerk reflex.

Detailed explanation-2: -In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain.

Detailed explanation-3: -Reflexes are unconscious responses, which means they are automatic and do not require the brain to create the action. There are many different types of reflexes, but the most basic is called a simple reflex.

Detailed explanation-4: -Blinking of eyes is not a reflex action, but it is involuntary action. A reflex action is one which occurs spontaneously whereas involuntary action happens without the conscious choice of an organism.

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