BIOL355 Lecture Notes - Lecture 3: Subcutaneous Tissue, Homeostasis, Endocrine System
27 Aug 2019
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Document Summary
Integration of information, analyzing if the condition is unacceptable, how to correct (respond) Usually part of brain (hypothalamus: effector provides means by which controller can cause response (output) to stimulus to return to normal. Biological age changes to negative feedback that allow more rapid or extreme alterations in body conditions (i. e. body temp: nervous and endocrine system changes with age, scenario: thermoreceptors in hypothalamus detect blood temperature. Behavioural thermoregulation is less important than other two: eyesight to observe thermometer, adding or removing clothing, turning on/ off up/down heating or cooling unit, migrating to warmer environments as opposed to cooler. Increasing surface area (spread out) or decrease (curl up) Elderly less competent in this respect: eyesight decreases with age, physical handicaps. Endocrine: hypothalamus signals to adrenals and thyroid to release hormones to increase or decrease metabolism to maintain inner core temperature. Over time stressor (persistent or severe) can injure cells.
