Chapter 9 - 9.11 - 9.13

A hollow space between the skull and spinal cord where the spinal cord attaches to the brain is called the: __________ ____________. 

hint: in picture

How many thoracic vertebrae exist in the spine? 

• 7
• 12
• 5
• 4

What is a reflex arc?

• A reflex arc is a voluntary/conscious action controlled by the brain.

• A reflex arc is an involuntary/automatic response to a stimulus without involving the brain.

How many lumbar vertebrae exist in the spine? 

• 7
• 12
• 5
• 4

The meninges are 3 layers of protective tissue that cover and protect the brain and spinal cord.

This layer contains the subarachnoid space that contains the clear, water, cerebrospinal fluid (CSF).

• DURA MATER

• ARACHNOID MATER

• PIA MATER

Gray matter divides the white matter of the spinal cord into three regions on EACH side---the anterior, lateral & posterior funiculi. Each consists of _________ axons that comprise major neural pathways. In the CNS, such bundles are called tracts.

hint: d e t a n i l e y m

The sensory neurons that are associated with the spinal cord have cell bodies that are NOT in the spinal cord at all. Rather, the cell bodies of these ________ neurons are clustered in the dorsal root ganglia associated with the spinal nerves at each segment of the spinal cord.

hint: a specific types of neuron

How many cervical vertebrae exist in the spine? 

• 7
• 12
• 5
• 4

How many vertebrae are fused together to form the sacrum spine? 

• 7
• 12
• 5
• 4

A horizontal bar of gray matter in the middle of the spinal cord, the gray commissure, connects the wings of the gray matter on the right and left side. The bar surrounds the central canal which contains ___________ _________

(2 words hint in picture)