KNES 464 Lecture Notes - Lecture 5: Motor Neuron, Titin, Neuromuscular Junction
16 Oct 2018
School
Department
Course
Professor
Myoglobin
- Structural feature and also biochemical and functional feature (helping as oxygen
carrier)
- Oxygen carrier inside cell
Cappilliariation—important to transport nutrients to cells
Slow oxidative muscle-- short repetitive motions—postural, locomotion, and diagrpham-- calves
(soleus), diaphragm, back (posture)
Length-Tension Relationship, Fiber Types, and Recruitment Insulin Signaling, & Glucose
Transport
Muscle Fiber Types
- White—fast oxidative (Achilles tendon)
- Red—slow oxidative (soleus)
- Most Fast glycolytic muscle-
Bird Flight muscle—very oxidative- very dark (humans do not have anything this dark)
- Birds use their pecs over and over agan- two huge pectoralis muscles—full of oxygen,
mitochondria—relaly extended flight patterns- need oxidative metabolism
o Mitochondira usues glucose and fatty acids (fats are lighter to use than
carbohydrates)
▪ If you are flying a lot, then you want to fly a lot, then fat is the best thing
to utilizze
- 3 main components of muscles that take up space:
o contractile apparatus-- shortening components—myosin, actin,
o ATP—mostlyfrom mitochondria (PCr- lasts only 10 seconds, Glycolyis—lasts only
60 secs)
o Sarcoplasmic reticulum- SR- calcium
Within a muscle, humans have a hetero genous mix of type 1 and type 2
Muscle Fiber Types in Athletes and Non-Atheletes
% slow (type 1)
% fast (Type
IIa/x)
Distance runners
65-75
25-35
Sprinters
20-30
70-80
Non atheltes
45-55
45-55
- When myosin head is open—ADP and P—because it is ready to release the energy on
power stroke
Document Summary
Structural feature and also biochemical and functional feature (helping as oxygen carrier) Slow oxidative muscle-- short repetitive motions postural, locomotion, and diagrpham-- calves (soleus), diaphragm, back (posture) Length-tension relationship, fiber types, and recruitment insulin signaling, & glucose. Bird flight muscle very oxidative- very dark (humans do not have anything this dark) Birds use their pecs over and over agan- two huge pectoralis muscles full of oxygen, mitochondria relaly extended flight patterns- need oxidative metabolism: mitochondira usues glucose and fatty acids (fats are lighter to use than carbohydrates) If you are flying a lot, then you want to fly a lot, then fat is the best thing to utilizze. 3 main components of muscles that take up space: contractile apparatus-- shortening components myosin, actin, atp mostlyfrom mitochondria (pcr- lasts only 10 seconds, glycolyis lasts only. Within a muscle, humans have a hetero genous mix of type 1 and type 2.
