Question

which of the following lists the connective tissue coverings of the axons, fascicles and entire nerve in the correct order?
endoneurium, perineurium, epineurium
endoneurium, epineurium, perineurium
perineurium, epineurium, endoneurium
epineurium, endoneurium, perineurium

53 multiple choice 1 point
upon stimulation, adrenal medulla cells secrete _______ into the blood.
epinephrine
acetylcholine
serotonin
dopamine

54 multiple choice 1 point
alzheimer’s disease results in:
tremors
inflammation of the meninges
brain inflammation
memory loss

Explanation:

Question 1 (Connective tissue coverings of nerve)

The connective tissue coverings of a nerve: endoneurium surrounds individual axons, perineurium surrounds fascicles (groups of axons), and epineurium surrounds the entire nerve. So the correct order for axons, fascicles, entire nerve is endoneurium, perineurium, epineurium.

The adrenal medulla, upon stimulation (like stress), secretes epinephrine (and norepinephrine) into the blood. Acetylcholine is a neurotransmitter in synapses, serotonin is involved in mood/intestinal function, dopamine in reward/movement. So the correct answer is epinephrine.

Alzheimer’s disease is a neurodegenerative disorder that primarily causes memory loss (and cognitive decline). Tremors are linked to Parkinson’s, meningitis is inflammation of meninges, brain inflammation is encephalitis. So the result is memory loss.

Answer:

A. endoneurium, perineurium, epineurium

Question 2 (Adrenal medulla secretion)