Histology Flashcards
name the 3 types of muscle
skeletal
cardiac
smooth
name the 3 types of skeletal muscle
striated
unbranched
multinucleated
where are the nuclei located in skeletal muscle?
periphery
name the the fine transparent tubular sheath which envelops the fibres of skeletal muscles
sarcolemma
muscles are grouped into bundles called __________
muscles are grouped into bundles called FASCICLES
name the following:
(a) connective tissue around the whole muscle
(b) connective tissue around a single fascicle
(c) connective tissue around a single muscle fibre
(a) EPIMYSIUM - connective tissue around the whole muscle
(b) PERIMYSIUM - connective tissue around a single fascicle
(c) ENDOMYSIUM - connective tissue around a single muscle fibre
name the unit of contraction
sarcomere
thousands of sarcomeres are placed end-to-end to form a what?
myofibril
many myofibrils make up a what?
muscle fibre
sarcomeres extend form one _ line to the next
sarcomeres extend form one Z line to the next
what is a motor unit?
one motor neurone and all the muscle fibres that it innervates
the fewer number of muscle fibres that a motor unit innervates = ???
few muscle fibres = finer the control
name the special type of synapse in a motor neurone
neuromuscular junction
name the 3 types of skeletal muscle
type I
type IIA
type IIB
name the muscle fibre:
fast contracting – anaerobic metabolism – fast fatigue – great force – white
type IIB
name the muscle fibre:
slow contracting – resistant to fatigue – produce less force - red
type I