Lecture 18 Biology 2

Lecture 18 Biology 2 - Lecture 18: Endocrine System...

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Lecture 18: Endocrine System Endocrine System--Outline I. Endocrine vs. exocrine systems II. The nature of hormones III. Receptors and negative biofeedbacks IV. Types of hormones and signals V. Survey of major endocrine glands Chemical Signaling in Animals Chemical Signals —the external environment-- affect the interaction of organisms --the internal environment-- affect internal functioning of organs
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The Exocrine System A set of glands produces chemical compounds released into the environment Communicate information… Examples: mate location, courtship, defense (e.g., pheromones) Human pheromones • October 2007 – 5300 lap dances – 60 day period –Ovu la t ing –Non -ovu la t ing – Menstruating –B i r th con t
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How do the Nervous and Endocrine Systems Differ? • Neurotransmitters – Rapid acting – Control over short time periods (seconds to minutes) – Cross synapses – Examples – • Heart rate • Respiration • Voluntary muscle contractions •H o rm o n e s – Control of things that change over long time periods (minutes to years) – Specialized glands – Examples –
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Lecture 18 Biology 2 - Lecture 18: Endocrine System...

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