Question

Case study 19.1 (p.428) What's the connection between acetylcholine and Kelly's symptoms? Acetylcholine is a homone released during stress Acetylcholine is found primarily in sensory neuron connections Acetylcholine is found primanily in motor neuron connections Acetylcholine affects communication primarily with smooth muscles Case study 19 scenario (p.428) Kelly had been having difficulty focusing her eyes for a couple of weeks. She assumed her recent lack of sleep was the cause. But when she started dropping her keys and feeling unsteady when walking down the stairs, she became worried enough to go to the doctor. After the results of several tests were known, the doctor told her she has myasthenia gravis. This is a disease in which the body's own white blood cells start attacking acetylcholine receptors. These receptors may seem foreign to you, but by the end of this chapter you'll be able to put together "this big picture" and understand the foundations of this disease. p. 12 of 14 i

Answer 1

Ans) Acetylcholine is found primarily in motor neuron connection.

Explaination:

Acetylcholine is released by motor neurons at synapses with muscle cells, often called neuromuscular junctions. Like other neurotransmitters,acetylcholine is synthesized in the cytosol of the presynaptic axon terminal and stored in synaptic vesicles.

Ans) depolarization, excitatory postsynaptic potential

Explaination:

Excitatory postsynaptic potential (EPSP)
- depolarizes the postsynaptic membrane toward the threshold for an AP
- can result from opening of Na
+ channels or closing of K + channels→increases the likelihood of an AP forming in the postsynaptic cell.