Autonomics DSA Flashcards
What is the rule regarding Alpha receptors in Vascular Smooth Muscle?
It causes Vasoconstriction
What is the rule regarding Beta Receptors regarding vascular smooth muscle?
It cause vasodilation
What is the type of receptor for the radial muscle of the iris?
What is the hormone that binds to the receptor and what is its effect?
A-Adrenergic
2) Norepinephrine; dilation of the pupil
What type of receptor is located along the Ciliary Muscle of Lens?
What hormone binds to this receptor and what is its effect?
1) B2-Adrenergic Receptor
2) Epinephrine/ Norepinephrine; Relaxation of muscle/ Flattening of the Lens
What type of receptors are located in the heart muscle that function in the sympathetic nervous system?
What hormone binds to these receptors and what is its function?
1) B1 & B2 Adrenergic Receptors
2) Epinephrine & Norepienephrine. Increase HR & Strength of Contraction
What is the function of Alpha Receptors on vascular smooth muscle?
They cause contraction of vascular smooth muscle
What is the function of Beta Receptors on vascular smooth muscle?
They cause relaxation of vascular smooth muscle
Alteration of Alpha and Beta receptors has the most effect on what three structures/organs?
1) Skeletal muscle 2) Abdominal Organs 3) Kidneys
What are the three structures/organs that only have alpha receptors?
1) Skin & Mucosa 2) Salivary Glands (dry mouth) 3) Brain
What type of receptor does Bronchial Smooth Muscle possess?
What is the effect of a molecule binding to this receptor?
1) B2 Receptor
2) Smooth Muscle Relaxation, Bronchiodilation
What is the effect of a A1 Receptor agonist molecule binding on bronchial smooth muscle?
1) Decrease of bronchial secretion
What is the effect of a B2 receptor agonist binding on bronchial smooth muscle?
Increases secretion
Rescue inhalers Mechanism of action includes acting on what type of receptors and in what tissue?
1) Type B2 Receptors 2) Bronchial Smooth Muscle
What type of receptors are present in the GI tract that play a role in the fight or flight response?
Also, what is their effect when stimulated?
A1 and Beta receptors
2) Decrease Motility
What is the effect of an agonist molecule binding to a A2 receptor in the GI system?
Decrease in secretion
What is the effect of an agonist molecule binding to A1 and B2 receptors in the liver?
Increase in Glyocogenolysis; Liver
What is the effect of a agonist molecule binding to A1, B1, and B3 receptors in Adipose Tissue?
Increase in Lipolysis
What is effect of an agonist molecule binding to an A1 receptor in the GI system?
Increase in sphincter tone
Parasympathetic fibers in CN III go where?
Pupillary sphincter and ciliary muscle of the eye
Parasympathetic fibers from CN VII innervate what?
Lacrimal, Nasal, and Submandibular glands
Parasympathetic fibers from CN IX innervate what?
Parotid gland
Sacral group of parasympathetic nerve fibers has what function?
Supplies nerve signals to external genitalia to cause erections
Sympathetic nerve fibers from cord segment T1 generally pass where?
Into the head
Sympathetic nerve fibers from the cord segment T2 terminate where?
In the neck
