Describe how the connective tissue wrappings of a nerve compare to those of a muscle.

n multiple sclerosis, which type of cell is attacked by the immune system, causing a deficiency of myelin on CNS axons?A: neuronB: microglial cellC: ependymal cellD: oligodendrocyte

the following structure will carry efferent impulses from central nervous system to skeletal muscles to make them contract: select one: a b c d e f g h

Differentiate between movement and locomotion.

What system will reset the membrane potential after an action potential has moved along the sarcolemma?     acetylcholine receptors     Na+-K+ pump     desmosomes     voltage-gated Ca2+ channels

Draw a simple schematic of a neuron and label its parts. Where does “information” usually go in and through which structure is it passed on? Where is the action potential generated?

Xena eventually catches Callisto (remember, she is 25 years old). Salmoneus, who is 60 years old, agrees to deliver Callisto to face charges for war crimes. On the way, their cart crashes down a ravine. Salmoneus also suffers damage to his spinal cord during the accident. Compare the likely degree of regeneration/recovery of his spinal cord with that of the injured skeletal muscles and describe the consequences of your observations for his quality of life and ability to remain active.

What is affected by the electrical signal sent by the third structure? (This will be the fourth structure in the arc.) Where is the cell body of the fourth structure located? What is affected by the electrical signal sent by the fourth structure? (This will be the fifth structure in the arc.) What does the fifth structure do in response to that electrical signal and how does this action protect you? Describe a situation where a reflex arc would be activated that is not described in your lesson. Assume that the reflex arc has five components to it. Please choose a reflex that involves a body part below the neck. (If you have trouble with this, do an internet search for information on reflex arcs.)

Describe the tendon continuum

The tickle response can also trigger escape movements, increased heart rate and tears. What type of efferent neurons influence skeletal muscle movements, and which ones are responsible for increased heart rate, tears, etc.?