Control System Notes - Control System Notes HOMEOSTASIS 2...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Control System Notes HOMEOSTASIS – 2 systems involved ENDOCRINE Chemical NERVOUS Electrical Acts faster NEGATIVE FEEDBACK Triggers get a response that counteracts the initial fluctuation Ex. o Effector: radiator o Sensor/control center: thermostat o Stimulus: change in room temperature ENDOCRINE SYSTEM Kinds of hormones (some are not hormones – just signal molecules that act as hormones) Type Example Gland Action modified amino acids epinephrine norepinephrine Adrenal Increase metabolic activities peptides oxytocin ADH Post pituitary Post pituitary Uterine contraction Retention of water in kidneys proteins insulin glucagon cells of pancreas cells of pancreas glucose in blood glucose in blood steroids testosterone Estrogen progesterone Testes Ovaries Ovaries Sperm formation uterine lining uterine lining modified fatty acids prostaglandins Uterus, epididymis contractions Post anterior pituitary is an extension of hypothalamus in a way Water-Soluble vs. Lipid Soluble Hormones
Image of page 1

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

View Full Document Right Arrow Icon
Water soluble hormones: need receptor molecules on surface of cell to set off reactions within cell itself, slightly more complex o Proteins o Peptides o Modified amino acids Lipid-soluble hormones: can sail right through plasma membrane, act directly o Steroids o Modified fatty acids CELL SIGNALING Signal-transduction pathway
Image of page 2
1. Reception 2. Transduction – phosphorylation cascade 3. Response a. make inactive transcription factor active by phosphorylating it and now have a specific response for the gene b. Protein kinases become stimulators Kinds of Receptors G-Protein Coupled Receptors In the cell membrane Inactive G protein (GDP) and signaling molecule (growth hormone) Inactive G protein activates receptor
Image of page 3

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

View Full Document Right Arrow Icon
Image of page 4
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