100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
PNB 2250 EXAM 4 (final exam review) Study Guide with Complete Solutions $11.49   Add to cart

Exam (elaborations)

PNB 2250 EXAM 4 (final exam review) Study Guide with Complete Solutions

 3 views  0 purchase
  • Course
  • PNB 2250
  • Institution
  • PNB 2250

PNB 2250 EXAM 4 (final exam review) Study Guide with Complete Solutions stimulus - Ans:-detection by interaction with cellular proteins a change in cellular properties that generates a signal to other cells (chemical and electrical) causes a change in physiological state Control Systems - Ans...

[Show more]

Preview 4 out of 59  pages

  • October 24, 2024
  • 59
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • PNB 2250
  • PNB 2250
avatar-seller
GraceAmelia
©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




PNB 2250 EXAM 4 (final exam review)
Study Guide with Complete Solutions


stimulus - Ans:✔✔-detection by interaction with cellular proteins




a change in cellular properties that generates a signal to other cells


(chemical and electrical)




causes a change in physiological state


Control Systems - Ans:✔✔-(1) measure


(2) compare to desired values


(3) compute what changes need to be made


(4) correct and carry out


negative feedback process - Ans:✔✔-limited the change in physiological process

Page 1/59

, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




most common


postive feedback - Ans:✔✔-Accelerates the change in a physiological process




Inherently uncontrollable




Found in clotting and reproduction


feedback systems - Ans:✔✔-either on or off




there is no in between


homeostasis is based on 2 types of cells - Ans:✔✔-Neurons -- capable of electrical current flows across

membrane




Endocrine cells - Release of chemical messengers into the blood


differences between neurons and endocrine cells in homeostasis - Ans:✔✔-(1) signal speed

Page 2/59

, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




(2) number of cells affect


(3) precision


(4) extensive overlap


what is regulated? - Ans:✔✔-critical factors that can cause rapid death (T, pH, amount of O2, etc)




less critical yet still improtant (blood levels of nutrients)


endocrine signaling - Ans:✔✔-Regulated secretion of extracellular signal




Diffusion of signal into blood & circulation throughout body




Diffusion of signal into extracellular space




Binding (interacting) with target cell




Page 3/59

, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




slower time frame, longer lasting effects




diffusion towards target cells, recognition effect


endocrine vs exocrine secretion - Ans:✔✔-endocrine (inner secretion)




exocrine (outer secretion)




sensory cells --> afferent (into) CNS input --> efferent (out of) response


paracrine vs autocrine - Ans:✔✔-paracrine (secretion to neighbors)




autocrine (secretion to oneself)


endocrine tissue - Ans:✔✔-Cells or glands (Derived from epithelium but also nervous tissue)




hormones (chemical messengers) very low concentrations



Page 4/59

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 or Stuvia-credit 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 GraceAmelia. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $11.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

82388 documents were sold in the last 30 days

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

Start selling
$11.49
  • (0)
  Add to cart