Exam 11: The Nervous System: Autonomic and Motor Systems

The change in membrane potential that occurs in skeletal muscle cells in response to acetylcholine binding to its receptors is called a(n)

With respect to their innervation, individual skeletal muscle fibers (cells)are innervated by

Actions at which class of adrenergic receptor generally have inhibitory effects?

Where in the central nervous system do the preganglionic neurons of the parasympathetic nervous system originate?

Where on skeletal muscle is the highest density of nicotinic receptors?

One of the adaptations that occur to muscles due to exercise is that contractions become stronger and steadier over time even with no change in muscle mass. Which statement below best explains why muscle contractions may become stronger?

Binding of norepinephrine or epinephrine to a(n)receptor will activate an inhibitory G protein which decreases the activity of adenylate cyclase and therefore cAMP synthesis while the binding of these two neurotransmitters to a receptor will do the exact opposite.

Which of the following is located between the invaginations of the motor end plate of a neuromuscular junction?

The cranial nerve that innervates most of the viscera in the thoracic and abdominal cavities is the

For skeletal muscle to relax, the neural stimulation must decrease.

Located entirely within the autonomic ganglia, cells that modulate the flow of information to the target organ are called neurons.

Which of the following physiological responses is associated with an elevation in parasympathetic nervous system activity?

Describe the synaptic junctions between the neurons of the autonomic and somatic nervous systems and their effector organs.

At rest, what is the relative contribution of the sympathetic and parasympathetic nervous systems to the regulation of homeostasis?

The opening of a cation channel that allows both Na+ and K+ to move through will cause the membrane to _ _ because of the _.

The somatic nervous system provides both excitatory and inhibitory signals to skeletal muscle.

Binding of acetylcholine to receptors causes by opening channels that primarily permit sodium to permeate the membrane.

The autonomic nervous system consists of efferent pathways with two peripheral neurons that travel in series from the central nervous system to the effector organ.

What enzyme degrades the neurotransmitter released from varicosities of parasympathetic postganglionic neurons?