All living systems need energy ENDOTHERM ECTOTHERM Do

All living systems need energy ENDOTHERM ECTOTHERM

Do this: hold your breath. How long can you do so? …but don’t be this guy! p. s. : time to beat is 2 min 15 sec (Emer) seconds…and he did not die.

Who is Stig Severinsen?

22 minutes 00 seconds May 2012

Why do living things need oxygen? ? ?

Think about this… “What you breathe in, you urinate out. What you eat, you breathe out. ”

Aerobic CELLULAR RESPIRATION

Cellular Respiration O The process of releasing the chemical energy in glucose to make ATP Delta G = -686 kcal/mole

ATP Adenosine tri phosphate Made in mitochondria of eukaryotic cells.

Interesting sidenote: all your mitochondria are the same as your mother’s. Why is that?

Cell respiration occurs in three main stages

STEP 1: GLYCOLYSIS - “BREAK SUGAR”

IN: ___ glucose PYRUVATE ___ ATP OUT: ____ ATP ____ NADH Color-code your notes! ATP: NADH: PYRUVIC ACID:

KREBS CYCLE

2. Kreb’s Cycle Energy!

Summary Kreb’s IN OUT O For 1 acetyl Co. A O ____ CO 2 in… O (two per glucose) O ____ NADH O ____ FADH 2 O ____ ATP O Note: GTP first

ETC

1. NADH donates e-; H+ to intermembrane space 2. Co. Q transfers e- to next complex (progressively more electronegative) 3. Complex III accepts e- from FADH 2, H+ to intermembrane space 4. Cyt c is e- carrier to complex IV 5. Oxygen acts as final e- acceptor 6. ATP Synthase uses chemiosmosis to generate ATP (oxidative phosphorylation) 7. Transport protein moves ATP to cytoplasm

3. ETC IN OUT O NADH O 32 -34 ATP O FADH 2 O water O Oxygen

So, now, does this make sense? “What you breathe in, you urinate out. What you eat, you breathe out. ” Biologists are so clever and funny!

So, Breathe! You need your oxygen for. . CELLULAR RESPIRATION’s ETC!

We’ve Done it! …now you do it! POSTER to summarize all parts of cell respiration. Use “cheat sheet” to include all molecules and labels on parts.

WHAT DO THESE PRODUCTS HAVE IN COMMON?

WHY DO WE GET SORE MUSCLES DURING/AFTER A HARD WORKOUT?

LACTIC ACID PRODUCTION: REVERSIBLE OXYGEN DEBT

Metabolic Rates are Studied INDIRECT MEASURING: OXYGEN CONSUMED or CARBON DIOXIDE PRODUCED BMR: Relationship between activity and metabolic rate Q 10: (temp coefficient) relationship between temp and metabolic rates