1. How many pairs of spinal nerves do you see on the model?
2. From your study of the features of the nervous system, where would you expect to find the following:
a. Cell bodies of sensory neurons
b. Cell bodies of motor neurons
c. Axons of sensory neurons
d. Axons of motor neurons
e. Association neurons
f. Bundles of myelinated axons
g. Cerebrospinal fluid
1. On the model, I can see a total of 31 pairs of spinal nerves, which include 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal pair.
2.
a. Cell bodies of sensory neurons: Cell bodies of sensory neurons are typically found in sensory ganglia outside of the central nervous system, such as the dorsal root ganglia.
b. Cell bodies of motor neurons: Cell bodies of motor neurons are located in the gray matter of the spinal cord and in the motor cortex of the brain.
c. Axons of sensory neurons: Axons of sensory neurons are found within peripheral nerves and travel from the sensory receptors to the central nervous system.
d. Axons of motor neurons: Axons of motor neurons can be found in the peripheral nerves carrying signals from the central nervous system to muscles and glands.
e. Association neurons: Association neurons, also known as interneurons, are mainly located within the central nervous system where they connect sensory and motor neurons.
f. Bundles of myelinated axons: Bundles of myelinated axons form white matter tracts within the central nervous system and can be found throughout the brain and spinal cord.
g. Cerebrospinal fluid: Cerebrospinal fluid is found in the ventricles of the brain, the central canal of the spinal cord, and the subarachnoid space surrounding the brain and spinal cord.