Exam 11: Efferent Division: Autonomic and Somatic Motor Control

Cholinergic muscarinic receptors are found at the ________ in the ANS.

Match the answers to the questions. -The ganglia are found in a chain that runs close to the spinal cord or along the descending aorta.

Match the answers to the questions. -On average,one preganglionic neuron synapses with eight or nine postganglionic neurons,each innervating a different target.

In a laboratory experiment,adding curare,which binds to acetylcholine receptors,to the solution around a muscle decreases the size of the end-plate potential.Adding prostigmine,an acetylcholinesterase blocker,increases the size of the end-plate potential.Explain why.

Match the response with the type of chemical. -pupil dilation

Compare and contrast the voltage-gated sodium and potassium channels introduced in Chapter 8,with the acetylcholine receptor/channel.What may be confusing to the beginning physiology student trying to understand the ion specificity of the acetylcholine receptor? What type of change in the cell is produced by ion movement through each type of channel?

The two divisions of the efferent side of the peripheral nervous system are

Match the answers to the questions. -Most preganglionic neurons originate in the thoracic and lumbar regions of the spinal cord.

Match the following with its description. -primary sympathetic neurotransmitter

________ are swellings that contain vesicles filled with neurotransmitter.

Match the answers to the questions. -The cell bodies of preganglionic neurons are found either in the brain stem or in the sacral region of the spinal cord.

The signal molecule ________ elicits the stronger response from alpha receptors.

Match the answers to the questions. -It releases norepinephrine at the neuroeffector synapse.

Antagonistic control of efferent output is typical of the ________ division.

Which area is NOT normally considered to be an autonomic control center?

Match the following with its description. -released by all autonomic preganglionic neurons

Which area(s)of the brain exert(s)control over the autonomic nervous system? 1)cerebrum 2)cerebellum 3)hypothalamus 4)pons 5)medulla 6)thalamus

Cholinergic receptors respond to the neurotransmitter ________.

Match the response with the type of chemical. -blocks sweating

Your studies of the neuromuscular junction reveal that the excitatory neurotransmitter opens a channel permeable to all three cations.Calculate the equilibrium potential for each cation.In which direction will each cation move when the channel is open? Does movement of ions promote muscle depolarization? Explain your answer.