Flashcards in Muscle part 1 Deck (16)
Bone (osteoblasts) produce a hormone: _____
What are the 7 functions of Muscles?
1. Movement of skeleton
2. Circulation of blood
6. Focusing of vision
7. Temp regulation
What is the "muscle action"
can only pull (contract), NOT push
What is the gross structure of Skeletal Muscle?
Tendon - connects muscle to bone
Origin - more stationary and proximal attachment
Insertion - more distal and mobile attachment
The entire muscle is covered by _____
Bundles of muscle fibers are grouped into _____ surrounded by _____.
Individual muscle fibers are surrounded by _____ and connective tissue, _____
Muscle cells are called _____ or _____ they are multinucleated
What are the types of muscles?
Striated - Cardiac & skeletal
Smooth - repro tissues, digestive tract & vasculature
Voluntary - skeletal
Involuntary - smooth
_____ - selective permeability allows differential ion balance between the extracellular fluid and the sarcoplasm
Resting membrane potential
Why is the resting membrane potential negative?
What are the 3 types of proteins in myofibers?
1. Contractile proteins (myosin)
2. Regulatory proteins (tropomyosin)
3. Structural proteins (titin)
What are the 2 types of myofilaments differing in size and structure?
1. Actin - thin
2. Myosin - thick
_____ - center of sarcomere made up of thick filaments (center) and lateral regions made yup of thick and thin myofilaments
Center of the A-band is _____ which is the interconnection of thick myofilaments.