Week 1 - Book notes - Chapters 1 and 2

Week 1 - Book notes - Chapters 1 and 2 - Physiology Week 1...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Physiology – Week 1 – Book notes- Chapter 1 and 2 (2-11, 20-46) Anatomy- is the study of internal and external structures of the body and the physical relationships among the body parts (parts) Physiology : study of how organisms perform their vital functionalty (function) Levels of Organization Organism organ system organ tissue cellular Chemical/molecular level Homeostasis: the adjustment of physiological systems to preserve homeostasis (consistent balance in body, stability) **Heart rate, BP, glucose etc Autoregulation: An intrinsic regulation, occurs when activities of a cell, tissue , organ or organ system adjust automatically in response to some environmental Extrinsic Regulation: results from activities of the nervous system or endocrine system, 2 systems which control or adjust the activities of many systems simultaneously o Ex: exercise – nervous system commands heart rate to increase Receptor: sensor that is sensitive to a particular environmental change, STIMULUS Control Center: integration center, receives and processes the information supplied by the receptor Effectors: a cell or organ that responds to the commands of the control center and whose activity either opposes or enhances a stimulus Negative Feedback: The effector, activated by the control center, opposes or negates, the original stimulus. Usually minimizes change Most homeostasis is this! Positive Feedback Initial stimulus produces a response that exaggerates or enhances the change in the original conditions rather than opposing it. Usually increases change
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
o Ex: room temp is going up… pos feedback will cause the temp to continue to rise. o Ex: having a baby.. contractions increase CHAPTER 2 Ionic bonds- created by the attraction of cations (+) and anions (-). Covalent bond- sharing electrons (very strong) Sharing one pair = single bond Sharing two pair = double bond (=) Non polar covalent- Between two atoms of the same type (ex: Carbon bonds) Polar covalent Unequal sharing between two different Hydrogen Bonds- weak interaction The attraction of a partial positive charged Hydrogen to a partially negative charged Oxygen or Nitrogen
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern