Autonomics Flashcards
A neuron leaves the CNS via CN X and synapses on the SA node of the heart. What receptor type is found on the target cells?
Muscarinic cholinergic receptors
An alpha-1 adrenergic receptor located on smooth muscle is activated by its sympathetic innervation. What is the most likely effect?
Contraction of the smooth muscle cell
A neuron leaves the SC and synapses on a postganglionic cell located in a ganglion in the paravertebral column. The postganglionic cell’s axon is long and synapses on a sweat gland. What NT receptors are expressed on the dendrites of the postganglionic cell?
Nicotinic cholinergic
What autonomic sympathetic receptor is involved in smooth muscle (blood vessel) contraction?
Alpha 1
What autonomic sympathetic receptor is involved in smooth muscle (blood vessel) dilation?
Alpha 2
What autonomic sympathetic receptor acts on the heart?
Beta 1
What autonomic sympathetic receptor is involved in smooth muscle relaxation on the lungs?
Beta 2
What type of innervation to the heart are spinal levels 1-T5?
Excessive signaling from spinal levels T1-T5 can cause?
1) Sympathetic
2) Tachycardia
What do muscarinic receptors cause?
Bronchial smooth muscle constriction
What nerve carries sympathetic fibers to the upper respiratory system?
Parasympathetic fibers to upper respiratory?
1) CN VII
2) Trigeminal
What type of fibers decrease secretion?
Increase nasal secretion?
1) Sympathetic
2) Parasympathetic
What effect can alpha 1 receptors have on kidneys?
Vasoconstriction leading to reduced blood flow to kidney and urine production
What receptor is responsible for increasing renin release and acts upon the juxtaglomerular apparatus?
Beta 1`
What receptor increases stroke volume and HR?
Beta 1
Which receptors increase glandular secretions in the lungs?
Beta adrenergics
