spinal cord and reflex action

The spinal cord is protected by a bony spinal column made up of bones called ____________.

• White matter
• Gray matter
• Meninges
• Vertebrae

What is the fluid in the space between the meninges that acts as a shock absorber to the brain and spinal cord called? 

• Blood-Brain Barrier
• Meninges
• Cerebrospinal Fluid
• Cerebral Cortex

Which of the following transmits information from the spinal cord to the extremities of the body?

• ventral roots

• dorsal roots

• dorsal root ganglia

• Spinal plexus

When you touch the hot handle of a pan, this causes a reflex which happens at the __________ level without having the brain process the impulse first.

• Brain Stem
• Frontal Lobe
• Spinal Cord and Parietal Lobe
• Spinal Cord

AFFERENT Neurons that transmit  impulses TO  the CNS are called

• neuoglia
• sensory
• efferent
• association

Effectors may be all of the following EXCEPT:

• cardiac muscle
• glands
• smooth muscles
• sensory cells

Tags

NGSS.HS-LS1-3

An effector is also known as a ____________ to an action

• Stimulus

• Sensory neuron

• Motor neuron

• Response

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

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

How is a reflex arc different than other voluntary movements?

• A reflex arc takes the same path as a voluntary action

• A reflex a travels from a sensory neuron to the spinal cord then to a motor neuron, skipping the brain

• A reflex arc takes longer than a voluntary action

• There is no difference between a reflex arc and a voluntary action