The centers for cardiac, digestive, and vasomotor functions are housed within the
In the brain, the ___ is the integration and command center for autonomic functions.
Which may be involved in an autonomic reflex?
-Cardiac muscle contraction
-Smooth muscle contraction
-Secretion by glands
-All of the choices are correct
-None of the choices is correct
All of the choices are correct
Which type of innervation causes the heart rate to increase?
Which type of innervation causes reduced blood flow to the digestive tract?
Which type of innervation causes pupil dilation?
Which autonomic plexus innervates viscera within the pelvic region?
-Abdominal aortic plexus
The first of the two ANS motor neurons is the ___ Neuron.
Which is not an effector innervated by the autonomic nervous system?
-No exceptions; all are effectors of the autonomies nervous system
The two divisions of the autonomic nervous system, sympathetic and parasympathetic,
-Use preganglionic and postganglionic neurons to innervate skeletal muscle
-Contain autonomic ganglia to house ganglionic neurons
-Are composed of PNS structures only
-Function only during sleep
Which cranial nerves are associated with the parasympathetic division of the ANS?
a:III b:IV c:V d:VII e:IX f:X g:XII
a, d, e, f
The preganglionic axons if CN III extend to the ___ ganglion.
The glossopharyngeal nerve innervates the
-Parotid salivary gland
-Sublingual salivary gland
Parotid salivary gland
The CN that supp;its parasympathetic innervation to the thoracic organs is
The sympathetic trunks are located
-Superior to the brachial plexus
-Inferior to the sacral plexus
-Immediately lateral to the vertebral column
-Lateral to prevertebral ganglia
-In the craniosacral regions
The preganglionic sympathetic neuron cell bodies are housed in the
-Anterior columns of the spinal cord
-Posterior columns of the spinal cord
-Lateral horns of the T1-L2 segments of the spinal cord
Lateral horns of the T1-L2 segments of the spinal cord
Postganglionic sympathetic axons are carried from the sympathetic trunk to the spinal nerve by
-White rami communicantes
-Superior cervical ganglion
-Gray rami communicantes
Why do asthma sufferers often use inhalers that contain sympathomimetics to ease their symptoms?
-Sympathomimetics suppress release of norepinephrine and epinephrine
-The drugs are antagonists that bind to adrenergic receptors in the bronchial tubes without stimulating them
-The drugs are agonists that stimulate adrenergic receptors in the bronchial tubes
-The sympathomimetics bind to muscarinic receptors and block them
-Sympathomimetics enhance the release of acetylcholine from preganglionic and postganglionic neurons
The drugs are agonists that stimulate adrenergic receptors in the bronchial tubes
What structure is supplied by postganglionic fibers originating in the ciliary ganglion?
-Smooth muscle of the iris that constricts the pupil
-Submandibular salivary gland
Smooth muscle of the iris that constricts the pupil
Which nerve carries parasympathetic fiber to the parotid salivary gland?
-Trigeminal nerve (CN V)
-Facial nerve (CN VII)
-Glossopharyngeal nerve (CN IX)
-Vagus nerve (CN X)
-Oculomotor nerve (CN III)
Glossopharyngeal nerve (CN IX)
What condition is characterized by cyanosis and pain in the fingers due to extreme vasoconstriction in the digits resulting from excessive sympathetic stimulation?
-Mass reflex reaction
Which nerve carries over 90% of parasympathetic fibers?
What nerve(s) carries sympathetic fibers that increase heart rate and force of contraction?
-Sympathetic nerves from the cervical ganglion
-Sympathetic nerves from the celiac ganglion
Sympathetic nerves from the celiac ganglion
Which part of the brain exerts the most control over the autonomic nervous system?
-The cerebral cortex
-The medulla oblongata
The medulla oblongata