Lecture+notes+05 - Copy

Lecture+notes+05 - Copy - Lecture Notes Bio 109, Fall 2010,...

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Lecture Notes Bio 109, Fall 2010, Dr. Catherine Loudon Lecture 5 – 10/04/10 – Temperature regulation, hormones 1) Positive feedback loop i) Used to drive process to extreme or to reach endpoint (e.g. birth Fig. 6-28) ii) Response by effector is in same direction as perturbation 2) Clicker concept check – If the regulated variable (for Fig. 6-28) is stretch in the cervix, the effector is (any answer counts) a) A. the gland releasing oxytocin (also acceptable answer) b) B. muscles in the uterus (best answer) c) C. the cervix itself d) D. the baby’s head e) Note effector is usually muscle or gland 3) Set points for regulated variables can change with time of day/night (circadian rhythm), season, or activity a) Temperature is regulated at slightly lower level at night than during day (Fig. 6-29) b) Hormone levels are often different during day and night (Fig. 6-29) i) Clinical implications for measuring hormone levels ii) Affected by sleep patterns 4) Body temperature affected by a)
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This note was uploaded on 12/01/2010 for the course BIO SCI Bio Sci E1 taught by Professor Catherineloudin during the Spring '10 term at UC Irvine.

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Lecture+notes+05 - Copy - Lecture Notes Bio 109, Fall 2010,...

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