reflex action

•What is a reflex action?

• •A voluntary movement initiated by the brain.

• A rapid and automatic response to a stimulus that bypasses conscious thought processes.

• •A deliberate action requiring conscious decision-making.

• •A slow and deliberate response to a stimulus involving multiple brain regions.

•Which of the following best describes the role of receptors in the human body?

• •They bring about a response.

• •They transmit signals across the central nervous system.

• •They detect changes in the external environment.

• •They transmit electrical impulses across synapses.

•Which of the following shows the correct process of a reflex arc?

• •Stimulus, receptor, motor neuron, relay neuron, sensory neuron, effector, response

• •Stimulus, receptor, sensory neuron, relay neuron, motor neuron, effector, response

• •Receptor, stimulus, sensory neuron, relay neuron, motor neuron, effector, response

• •Receptor, stimulus, relay neuron, sensory neuron, motor neuron, effector, response

Why is the pupil constriction reflex important for your eyes?

• • It helps you see better in dim light

• • It protects the retina from damage by limiting light

• • It improves your night vision

• • It helps you focus on objects

Why do reflexes occur without the involvement of the brain?

• • Reflexes are part of conscious thought

• • The brain takes too long to process reflex actions

• • Reflex actions are processed in the spinal cord for faster responses

• • Reflexes are voluntary actions