/.3 main factors that affect Stroke volume - Answer-preload, contractility, afterload
/.activated by emotional or physical stressors - Answer-sympathetic nervous system
/.ADH - Answer-high levels can cause vasoconstriction
/.Afterload - Answer-back pressure exerted by arterial blood
/.Angiotensin II - Answer-stimulates aldosterone secretion
/.angiotensin II - Answer-stimulates vasoconstriction
/.arterial anastomoses - Answer-provide alternate pathways to ensure continuous flow
/.Arterioles - Answer-smallest arteries
/.arteriovenous anastomosis - Answer-shunts in capillaries
/.atrial natriuretic peptide - Answer-decreases BP by antagonizing aldosterone, causing
decreased blood volume
/.baroreceptor reflexes - Answer-Located in carotid sinuses, aortic arch, and walls of
large arteries of neck and thorax
/.blood flow - Answer-volume of blood flowing through vessels, organs, or entire
circulation
/.blood pressure - Answer-force per unit area exerted on wall of blood vessel by blood
/.blood pressure is lower in the ____ than in the ____ - Answer-veins, arteries
/.blood vessel diameter - Answer-greatest influence on resistance
/.blood viscosity - Answer-thickness of blood
/.Bradycardia - Answer-heart rate less than 60 bpm
, /.Capillaries - Answer-Microscopic vessel through which exchanges take place between
the blood and cells of the body
/.capillary beds - Answer-interwoven network of capillaries between arterioles and
venules
/.capillary exchange - Answer-many molecules pass by diffusion between blood and
interstitial fluid
/.cardiac centers - Answer-cardioinhibitory and cardioacceleratory centers
/.cardiac output - Answer-the amount of blood pumped by the heart per minute
/.cardiac veins - Answer-collect blood from capillary beds
/.cardioacceleratory center - Answer-sends signals through sympathetic trunk to
increase both rate and force
stimulates SA and AV nodes
/.cardioinhibitory center - Answer-parasympathetic signals via vagus nerve to decrease
rate
Inhibits SA and AV nodes via vagus nerves
/.cardiovascular center - Answer-composed of clusters of sympathetic neurons in
medulla
/.chemoreceptor reflexes - Answer-Aortic arch and large arteries of neck detect increase
in CO2, or drop in pH or O2
/.circulatory shock - Answer-condition where blood vessels inadequately fill and cannot
circulate blood normally
/.CO can be maintained by _____ HR and contractility - Answer-increasing
/.colloid osmotic pressure - Answer-"sucking" pressure created by Non diffusible plasma
proteins pulling water back into capillary
/.continuous capillaries - Answer-Abundant in skin, muscles, lungs, and CNS
/.contractility - Answer-contractile strength at given muscle length
/.coordinated heartbeat - Answer-presence of gap junctions and intrinsic cardiac
conduction system
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller kartelodoc. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.99. You're not tied to anything after your purchase.
