How impulse travels in reflex movement

Reflex movements occur without conscious awareness and are faster than voluntary actions. An example is the quick withdrawal of a hand from a hot object to prevent injury. Reflex actions are processed in the spinal cord and medulla, bypassing the brain. The process begins with a heat stimulus detected by skin receptors, sending an impulse via sensory nerves to the spinal cord. The impulse then travels through motor nerves to the arm muscles, causing a rapid reaction to avoid harm.

What is a characteristic of reflex movements compared to conscious movements?

• They are slower.

• They require brain processing.

• They are voluntary.

• They occur without awareness.

Which part of the body is NOT involved in directing reflex movements?

• Heart

• Brain

• Medulla oblongata

• Spinal cord

Where does the impulse travel after being accepted by the skin receptor?

• Directly to the brain

• To the spinal cord

• To the lungs

• To the heart

What role do motor nerves play in reflex actions?

• They transmit impulses to muscles.

• They process information in the spinal cord.

• They receive stimuli from the environment.

• They carry impulses to the brain.

What is the final outcome of a reflex action when a heat stimulus is detected?

• The brain processes the information.

• The arm moves towards the heat.

• The arm moves away from the heat.

• The heart rate increases.