BIOLOGY 220 LECTURE #16 - Metabolism, Thermoregulation, Nutrient Cycle

BIOLOGY 220 LECTURE #16 - Metabolism, Thermoregulation, Nutrient Cycle

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
BIOLOGY 220 LECTURE #16 – Metabolism/Thermoregulation and Nutrient Cycling – 10/25/07 METABOLISM AND THERMOREGULATION METABOLISM AND THERMOREGULATION – (3) Respiration o Mammals (endothermic) use metabolism to create the heat that keeps our body at a certain temperature point o Respiration – process of breaking down glucose to power our bodies – not only produces ATP, but some of the chemical energy in glucose is lost as heat – not efficient change of one type of chemical energy to another – the heat from this process is what heats our bodies Thermogenesis o Behavior Shivering Vasodilatation or vasoconstriction of blood vessels Physiological reactions are ways of modifying the temperature of our bodies Fat metabolism – non-shivering thermogenesis o Push fat molecules into metabolic pathway and as you are changing them – instead of producing ATP producing heat only Homeostasis maintain constant condition What do we use the other products for? o Metabolism of fat – we can use it to maintain body temperature Proteins – Break down into component amino acids – use amino acids We acquire amino acids through food – break them down into Nucleotides – make our own DNA and RNA get them from other sources Sugars power body How are these elemental resources moving throughout the world’s ecosystems o Things are constantly cycling through the ground, water, atmosphere and these elements are being pushed and pulled into different forms
Background image of page 1

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

View Full DocumentRight Arrow Icon
NITROGEN CYCLE – (7) Nitrogen is a typical cycle in terms of how an element moves through the different mediums of the world Biogeochemical – Things that have biotic interactions, inert items (rock, water, gases), things that undergo chemical reactions Why is Nitrogen important to organisms? o Nitrogen is a major component for all of your major proteins and amino acids o Major component for all nucleotides o Chlorophyll – needs nitrogen to function properly How do organisms obtain Nitrogen o If you’re an animal or plant – get from food source or from dissolved form of
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

BIOLOGY 220 LECTURE #16 - Metabolism, Thermoregulation, Nutrient Cycle

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online