ANATOMY

Detailed explanation-1: -This quick response is called a reflex, and reflexes occur without conscious thinking or planning, meaning the brain is not involved in them.

Detailed explanation-2: -A reflex arc is a neural pathway that controls a reflex. 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: -Reflex action is a sudden and involuntary response to stimuli. It helps organisms to quickly adapt to an adverse circumstance that could have the potential to cause bodily harm or even death.

Detailed explanation-4: -Your brainstem helps regulate some body functions, including your breathing and heart rate. The brainstem also controls your balance, coordination and reflexes.

Detailed explanation-5: -Monosynaptic reflexes: Only one synapse is present in the reflex arc. These reflexes involve a sensory neuron and an effector neuron. Polysynaptic reflexes: The include more than one chemical synapse in the reflex arc. They involve at least three neurons in the reflex action.