Reflex Arc

In the Patellar reflex arc (knee jerk), the leg muscle is the

• stimulus

• effector

• response

• sensory neuron

Tags

NGSS.MS-LS1-3

Select the correct answer.

A bright light causes your iris to contract the pupil, reducing the amount of light let in.

• the light is the stimulus, the cataract is the effector

• the light is the stimulus, the iris is the effector

• the pupil is the stimulus, the iris is the effector

• the retina is the stimulus, the lens is the effector

Tags

NGSS.MS-LS1-8

Information reaches an effector to evoke a response.

• 1

• 2

• 3

• 4

• 5

Receptor indicates a stimulus.

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.MS-LS1-3

Information travels along the afferent/sensory pathway to the integration center.

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.MS-LS1-3

Association neurons link afferent and efferent pathways.

• 1

• 2

• 3

• 4

• 5

Information travels back via the efferent/motor pathway.

• 1

• 2

• 3

• 4

• 5

Name an effector in this diagram.

• A

• B

• D

• E

• F

In a reflex arc, the sensory neuron leads to the ___________ and the motor neuron leads to the __________

• Spinal cord, CNS

• CNS, muscle

• Spinal cord, muscle

• Muscle, CNS

Which type of neuron causes a muscle to contract in a reflex arc?

• Motor Neuron

• Sensory Neuron

• Interneuron

• Effector