Understanding Reflex Arcs

What is a 2-way reflex arc?

• A 2-way reflex arc is a slow response mechanism.

• A 2-way reflex arc is a neural pathway that involves both sensory and motor neurons, allowing for a quick response to stimuli.

• A 2-way reflex arc is a type of muscle contraction.

• A 2-way reflex arc only involves motor neurons.

Describe the components of a 2-way reflex arc.

• motor neuron, sensory receptor, spinal cord

• The components of a 2-way reflex arc are: sensory neuron, interneuron, and motor neuron.

• sensory neuron, motor neuron, reflex arc

• interneuron, motor neuron, sensory receptor

How does a 3-way reflex arc differ from a 2-way reflex arc?

• A 3-way reflex arc includes an interneuron, while a 2-way reflex arc does not.

• A 3-way reflex arc involves only sensory and motor neurons.

• A 2-way reflex arc includes an interneuron, while a 3-way reflex arc does not.

• A 3-way reflex arc is faster than a 2-way reflex arc.

What role do interneurons play in a 3-way reflex arc?

• Interneurons connect sensory and motor neurons, facilitating reflex actions.

• Interneurons transmit signals to the brain for processing.

• Interneurons inhibit sensory neuron activity.

• Interneurons are responsible for muscle contraction.

Give an example of a situation that involves a 2-way reflex arc.

• Watching a movie and laughing at a joke.

• Listening to music and tapping your foot.

• Feeling a gentle breeze and staying still.

• Touching a hot stove and quickly pulling your hand away.

What is the function of sensory neurons in reflex arcs?

• Sensory neurons regulate blood pressure.

• Sensory neurons are responsible for hormone secretion.

• Sensory neurons detect stimuli and transmit information to initiate reflex actions.

• Sensory neurons transmit motor commands to muscles.

Explain the significance of motor neurons in reflex actions.

• Motor neurons are responsible for processing sensory information during reflexes.

• Motor neurons are essential for executing reflex actions by conveying signals from the spinal cord to muscles, enabling rapid responses.

• Motor neurons transmit signals from muscles to the brain for reflex actions.

• Motor neurons inhibit muscle contractions to prevent reflex actions.

How do reflex arcs contribute to homeostasis?

• Reflex arcs contribute to homeostasis by enabling rapid responses to stimuli, helping to protect the body and maintain internal balance.

• Reflex arcs slow down responses to stimuli, disrupting homeostasis.

• Reflex arcs are unrelated to the nervous system and do not influence homeostasis.

• Reflex arcs only function during sleep, not affecting homeostasis.

What are the potential effects of damage to reflex pathways?

• Decreased muscle tone

• Improved coordination

• Enhanced reflex responses

• Impaired reflex responses, delayed or absent reflexes, increased muscle tone, abnormal movements, and coordination issues.

Why are reflex actions considered involuntary?

• Reflex actions are always slow and deliberate.

• Reflex actions can be controlled at will.

• Reflex actions are involuntary because they happen automatically without conscious control.

• Reflex actions require conscious thought to occur.