Overall Flashcards
(42 cards)
What are the 4 tissue types?
Connective, Epithelial, Nervous and Muscle
Briefly describe Connective tissue
Supports and protects
Briefly describe Epithelial tissue
Protection and secretion
Briefly describe Nervous tissue
Communication and sensory
Briefly describe Muscle tissue
Movement
What is the neurotransmitter between pre and post ganglionic neurons?
Sympathetic - Acetylcholine + norepinephrine/epinephrine
Parasympathetic - Acetylcholine & Acetylcholine
Describe a vein
Thin walls, carry deoxygenated blood towards heart
Describe an artery
Thick muscular walls, carries oxygenated blood away from heart
Advantages to parallel circuit?
Lower resistance, can regulate individual organs without effecting others. If one organ fails, downstream organs are not effected
Functions of the cardiac frame and where is it?
keeps valves in shape and in position, is an attachment for muscle bundles, acts as an insulator. Between atria and ventricles
What is the Frank-Starling mechanism of the heart?
The heart will pump out any amount of blood that it receives.
What is pneumothorax? why does it happen?
Collapse lung. The seal has broken.
Blood pressure of pulmonary circulation?
15-30mmHg
Blood pressure of systemic circulation?
100-140mmHg
What’s the name of the cells of the conduction system of the ventricles?
Purkinje cells
Where are Purkinje cells found?
Just below the endocardium
What kind of innervation does the heart receive from the parasympathetic system?
Acts on the nodes - slows heart rate
What kind of innervation does the heart receive from the sympathetic system?
Acts on entire system - increases HR, increases speed and force of contraction
What’s worse, atrial or ventricular fibrillation and why?
Ventricular as there is no pumping of blood.
What is the dead space in the lungs?
Where there is no gas exchange
How do AV valves open and close?
Change of pressure caused by contractions of the heart
Name the 3 types of capillaries
Continuous, sinusoid, fenestrated
Functions of the baroreceptors?
Short-term control of BP
Size of RBC
7.7 microns