{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Exercise 1.3 Answers - example of homeostasis that is under...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Answers to Lab Exercise 1.3 1. Homeostasis - dynamic constancy of the internal environment; steady state; internal balance 2. Set Point- the body value that is “most normal.” Much like a thermostat in the house for normal temperature, blood glucose concentration, the tension on a tendon, and so on. 3. Do not answer 4. Do not answer 5. Negative Feedback - A homeostatic mechanism whereby a change in a physiological variable that is being monitored triggers a response that counteracts the initial fluctuation Positive Feedback -A mechanism in which a change in some variable triggers mechanisms that amplify the change. Example: During childbirth, the pressure of the baby’s head against the uterine opening, heightens the contraction of the uterus, which causes still greater pressure. Positive feedback brings childbirth to completion. 6. The up-and down variation in successive pulse rate measurements that alternately rise above and then below a set-point suggests that resting pulse rate is an
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: example of homeostasis that is under negative feedback control ( it is dynamic). 7. Blood Pressure drops sensor detects fall in blood pressure sympathetic nerve fibers will cause increase of heart rate increases cardiac output blood pressure increases Blood pressure rises sensor detects rise in blood pressure parasympathetic fibers will cause decrease of heart rate decreases cardiac output Blood pressure decreases 8. The normal range for a given measurement is obtained by taking measurements from a large sample of people who are believed to be normal for the measurement. There is always a range values obtained, and this range, and its averages, will vary with the group of people tested. This is why normal ranges for one population of people may be different from normal ranges for another population....
View Full 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