Reflex

Front

What is a reflex?

Back

A reflex is an automatic, involuntary response to a stimulus that does not require conscious thought.

Front

What is the role of the spinal cord in reflex actions?

Back

The spinal cord processes reflex actions by transmitting signals between sensory neurons and motor neurons, allowing for quick responses.

Front

What is the difference between a reflex and a reaction?

Back

A reflex is an automatic response that occurs without conscious thought, while a reaction involves conscious processing and decision-making.

Front

What is the 'knee-jerk' reflex?

Back

The 'knee-jerk' reflex is a simple reflex action that occurs when the patellar tendon is tapped, causing the leg to kick out.

Front

What are motor neurons?

Back

Motor neurons are nerve cells that transmit signals from the spinal cord to muscles, causing them to contract.

Front

What are sensory neurons?

Back

Sensory neurons are nerve cells that carry signals from sensory receptors to the central nervous system.

Front

What is the function of interneurons?

Back

Interneurons connect sensory and motor neurons within the spinal cord and brain, facilitating communication between them.

Front

What does 'Δt' represent in reflex studies?

Back

'Δt' represents the time between the stimulus and the muscle contraction.

Front

How do you calculate the speed of nerve impulses?

Back

The speed of nerve impulses is calculated by measuring the distance the signal travels and the reflex time.

Front

What part of the nervous system is primarily involved in reflex actions?

Back

The spinal cord is primarily involved in reflex actions.