Reflex Actions

An example of a reflex action includes

• Touching a butterfly

• Brushing your hand against the side of your body

• Touching a hot stove

• Your legs moving as you walk

Tags

NGSS.MS-LS1-8

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

When you suddenly shine a torch in someone's eye, the pupil

• Contracts, then stays that way for the rest of the day because the pupil needs time to readjust

• Stays the same

• Dilates

• Contracts

Tags

NGSS.MS-LS1-8

What happens in the spinal cord during a reflex arc?

• The stimulus causes a sensory neuron to generate a nerve impulse

• The nerve impulse carries a signal to be directly sent to a sensory neuron

• The motor neuron causes a contraction

• The nerve impulse carries a signal to be directly sent to a motor neuron

Tags

NGSS.MS-LS1-3

If you pick up a hot plate _____________ receptors in your ___________ detect this change

• Sensory, skin

• Sensory, muscle

• Motor, skin

• Intermediate, muscle

Tags

NGSS.MS-LS1-8

Reflex actions are important because

• They provide a quick, involuntary response

• They prevent injury

• They are essential to the survival of organisms

• All of the above

Tags

NGSS.MS-LS1-8

What type of neuron is B?

• Sensory

• Inter

• Motor

Tags

NGSS.MS-LS1-8

Name an effector in this diagram.

• A

• B

• D

• E

• F

Tags

NGSS.HS-LS1-3

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

• Motor Neuron

• Sensory Neuron

• Interneuron

• Effector

Which statement best describes a reflex?

• Slow response that you have to think about

• Rapid response to protect body from harm

Tags

NGSS.MS-LS1-8