Class notes
Human biology lecture notes
- Course
- Human Biology (HUB228)
- Institution
- University Of The Western Cape (UWC)
Lecture notes about the regulation of BP and cardiovascular system function.
[Show more]
Seller
Follow
Content preview
B Nursing II HUB228 2022Department of Medical Biosciences
University of the Western Cape
Lecture 3 & 4:
Regulation of blood pressure and
cardiovascular system function
, Introduction
Factors involved in regulating blood flow, BV and ultimately BP:
(1) Autoregulation
• immediate, localized homeostatic adjustments to blood flow at
capillary beds
(2) Neural control mechanisms:
• act very rapidly, within few seconds to minutes after change in BP
• only stay active for few hours to few days
• prevent acute decrease in BP (e.g. due hemorrhage) or increase in BP (e.g.
excessive blood transfusion)
• mainly adjust CO and PR to stabilize BP and blood flow
(3) Endocrine/humoral control mechanisms:
• takes several minutes to hours to show any significant response
(4) Other long-term mechanisms
• very powerful to control BV and BP over days, weeks and months
,Regulation of BP and CVS function
, Autoregulation
• autoregulation = automatic adjustment of blood flow to each tissue
according to that tissue’s requirements at any moment
- autoregulation depends on the adjustment of a tissue/organ’s vascular
resistance (peripheral resistance) and maintaining a constant blood flow
- this is done intrinsically by modifying the diameter of local arterioles
supplying the capillaries either by:
o metabolic or
o myogenic controls
autoregulation is well developed in the
kidney, brain, heart, skeletal muscle and
mesentery
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 EFT, 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 this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller anlifourie. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R50,00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
56326 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now