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In the linear model, communication flows in two or more directions at once.

Dermatomes overlap substantially, so that injury to a spinal nerve does not lead to the complete loss of sensation in the relevant skin region. 

Muscle spindles are composed of intrafusal fibers called nuclear bag fibers and nuclear chain fibers. What is the difference between these fiber types, what type of information do they provide, and what type of sensory afferents innervate each of the different fibers?

In pseudounipolar neurons of the somatosensory system, the central and peripheral components of the fibers are a similar length. 

When the aqueous humor does not drain as quickly as it is produced, [answer1] occurs.  Whereas, when the elastic fibers in the eye become opaque,  [answer2] occurs.

Describe the phototransduction signaling cascade in a rod when light shines onto the cell.  Does this lead to a depolarization or hyperpolarization? Why? Be as detailed as possible!

Mandy is pregnant yet she still has four alcoholic drinks each day. Her baby may be at increased risk for the development of _____.

At around 38 weeks after conception, the _____ starts the sequence of events that prepares the fetus for delivery and starts the process of labor in the mother.

Which of these afferent fibers have the fastest conduction velocity? Which ones are the slowest? Explain WHY?

In the dark calcium ions flow into photoreceptor cells.   How does calcium lead to a decrease in dark current and prevent the cell from depolarizing too much? What is this process called?