100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Fundamentals of Physiology and Anatomy of Homeostasis, Epithelial Cells and Muscle £2.99   Add to cart

Lecture notes

Fundamentals of Physiology and Anatomy of Homeostasis, Epithelial Cells and Muscle

 5 views  0 purchase

Includes detailed notes on: Lecture 3: Homeostasis and Physiological Control (Dr Greg Knock) Lecture 4: Epithelial cells - (Dr Kosha Metha) Lecture 5: Structure and development of the cardiovascular system - (Dr Esther Bell) Lecture 6: Structure and function of Muscle cells - (Dr Kosha Mehta...

[Show more]

Preview 2 out of 14  pages

  • June 1, 2021
  • 14
  • 2020/2021
  • Lecture notes
  • Dr. greg knock
  • All classes
All documents for this subject (7)
avatar-seller
joharyantra
FUNDAMENTALS
OF PHYSIOLOGY
AND ANATOMY
4BBY1060




Epithelial & Muscular
Physiology & Anatomy

, LECTURE 3:

Important physiological variables
 O2, CO2, pH, Blood Glucose, Osmomolarity (Na +, K+), Temperature
Homeostatic control: dynamic maintenance of physiological variables within a
predictable range. May fluctuate within a normal range but average will be
predictable.
- Short term -> Immediate survival
- Medium-long term -> Health and well-being, reproductive capability




Negative feedback: Change in variable is compared to a set point, causing a
response that brings it back to normal ranges. (Blood O 2 and CO2 content)
Different types include:
- Neuronal, usually involving the ANS (sympathetic and parasympathetic)
- Endocrine (hormonal)
- Local (chemical/physical)
When physiological circumstances change, set points may be overridden (Fever,
during exercise)

Feed-forward: Anticipation of a change brings about the response to that change
before the change can be detected by negative feedback sensors

Positive feedback: Change in a variable trigger a response that causes further
change in that variable (e.g., giving birth)

Consists of:
 Sensors: detect changes in the physiological variable
 Afferent Pathway: carry signals from sensors to integrating center
 Integrating Centre: compares inputs from sensors against physiological
set-points and elicit a response
 Efferent Pathway: carry signals from integrating centre to effectors
 Effectors: produce a response that tends to normalize the physiological
variable
Hierarchy of importance: a variable that is of greater importance may be
maintained at the expense of other variables that are of importance at a longer
term.
 Increased salt intake –> increased water intake –> plasma osmolarity
maintained at expense of higher MABP –> Hypertension

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

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 joharyantra. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £2.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

72042 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now

Start selling
£2.99
  • (0)
  Add to cart