Respiration and Digestion Lab #6 – Bio 101. What is cellular respiration? A series of metabolic...
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Transcript of Respiration and Digestion Lab #6 – Bio 101. What is cellular respiration? A series of metabolic...
Respiration and DigestionLab #6 – Bio 101
What is cellular respiration? A series of metabolic processes that use glucose to create ATP – adenosine triphosphate
BUT! ...How do we get glucose? - Digestion
Step-by-step breakdown basics:• Amylase in saliva starts to break down starches to
disaccharides• Stomach acid breaks apart large structures such as
cells and intercellular structures• Amylase in the small intestine completes the
breakdown of all carbohydrates to disaccharides• Maltases, lactases, and sucrases break down
disaccharides into monosaccharides• Glucose is brought to all the cells in the body through
the circulatory system
Food
Digestion
Glucose
Respiration
Cellular respiration – it’s a redox reaction
Oxidation and reduction OIL RIGOxidation is “losing” Reduction is “gaining”
Reminder:
Losing/gaining what? - Hydrogen atoms (usually)
38 ATP & Heat
(Glucose molecule)
(What you inhale)(What you exhale)
Cellular respiration – inputs and outputs
3 stages of respiration: 1) glycolysis, 2) Kreb’s cycle (citric acid cycle), 3) electron transport
Physiological implications of respiration:CO2 + H2O = H2CO3 …aka carbonic acid
Too much respiration too quickly:1. Hyperventilation expels CO2 2. Reduction in carbonic acid3. which causes blood pH to rise 4. respiratory alkalosis = bad news
Homeostasis is regulated by the kidneys
Cool fact: This is the exact phenomena that leads to ocean acidification and coral reef bleaching!
Respiration in plants
(This is not respiration… it’s the opposite. Whoa.)
Starch = glucose stored as a polymer (polysaccharide)
Process is exactly the same as animals…
Adult plants
Seeds, during germination