Transcript New Muscle Power Point

MUSCLES
Muscles
http://www.youtube.com/watch?v=3FGZvFZdVbk (“pick things up”)
• Generate motion
• Generate force
• Some muscle tissues generate heat
Voluntary; Response to
Somatic Motor Neuron
w/ACh (AP), Striated.
Movement of
skeleton and skin.
(fastest)
Involuntary*;
Autonomic, Important
for homeostasis, wide
variety (6: H. sapiens),
Act as integrating
centers in response to
endocrine system, Not
striated.
Lines GI, walls of
viscera [stomach,
urinary bladder &
GI]. (slowest)
Involuntary*,
Specialized muscle
Autonomic, Shares BOTH for the heart.
smooth & skeletal
(intermediate)
muscle, striated,
electrically linked. Under
sympathetic,
parasympathetic &
hormonal control.
This sliding filament mechanism can only occur when there are sufficient calcium
ions (Ca2+) and sufficient ATP is also available.
Slow:
Fast:
Aerobic for
continuous
movement.
Less likely to
fatigue.
IIa: Anaerobic &
aerobic.
IIb: Anaerobic and
fastest contraction of all
muscle fibers. Highest
rate of fatigue.
Check your Standards for Study
•
05.02 Describe the four characteristics of muscle tissue.
(elasticity, excitability [irritability], extensibility, flexibility)
•
05.03 Contrast the general location, microscopic appearance, control, and
functions of the three specific types of muscle tissue. (skeletal, smooth, cardiac)
•
05.04 Contrast thick and thin myofilaments.
•
05.05 Describe the sliding-filament theory of muscle contraction.
•
05.06 Describe what occurs at the neuromuscular junction.
•
05.07 Define the terms “origin” and “insertion.”
•
05.08 Explain the role of prime movers (agonists), antagonists, synergists, and
fixators.
1) Actin & Myosin:
CONTRACTILE
2) Tropomyosin &
Troponin: REGULATORY
3) Titin & Nebulin:
ACCESSORY
VIDEOS
• http://www.youtube.com/watch?v=HEgVM3b
zN_Y (arnold)
• http://www.youtube.com/watch?v=KG1JHW_
q2VA&feature=related (contraction)