L7 Flashcards
(24 cards)
whats the origin of the neural tissue?
ECTODERMAL
neural tissue is made of ?
neuron + neuroglial cells
characteristics of neuron?
- longest cell of the body
- structural and functional unit of neural tissue.
- EXCITABLE CELLS
- conducting cells
characters of NEUROGLIAL CELLS?
- they make up more than 50% volume of the entire NEURAL TISSUE
- help in support and packaging of neuron. (synthesis of myelin sheath)
- non-excitable
- no conduction
what are the examples of neuroglial cells?
schwann cells and oligodendrocyte
whole muscle ki covering ko kya bolte h ?
epimysiym
whole muscle is formed of ?
many fascicles or muscle bundle.
covering of fascicile or muscle bundle is called as ?
permysium
fascile or muscle bundle if formed of ?
muscle fiber
covering of musle fiber is called?
endomysium
muscle fibre is made of ?
myofibrils / myofilament
epimysium , perimysium or endomysium these are made of which tissue?
connective tissue
how many types of muscle fibres are there? name them
skeletal muscle fibre
smooth muscle fibre
cardiac muscle fibre
syncitium conditon is present in which muscle fibre?
skeletal muscle fibre
characters of skeletal muscle fibre?
- cylindrical in shape
- unbranched
- multinucleate and nucles is present in periphery
- alternate dark and litght band (striated muscles)
- voluntary
- fast contraction
- rich blood supply
- easily fatigue.
- intercalated disc -nt
why skeletal muscles are known as striated muscles?
alternate dark and light bands c/a striation are prominently seen hence called as striated muscles
branches are seen in which muscle fibres?
cardiac muscles fibres
intercalated disc is found in ? and its is made of
- cardiac muscle fibre
- adhering junction + gap junction
which muscle fibre is uninucleate and present in centre?
smooth and cardiac
compare the striation seen in skeletal and cardiac muscle fibres?
in skeletal the striation are in alternate dark and light band manner
while in
Cardiac there are faint striation present so they also known as striated muscles
tell the type of contraction (slow or fast) in muscle fibres?
- skeletal muscles=
- smooth muscles=
- cardiac muscles =
fast contraction
slow contraction
fastest contraction
comparison of blood supply in each mucles fibres?
- skeletal muscles=
- smooth muscles=
- cardiac muscles =
rich blood supply
low blood supply
abundant blood supply
comparison of fatigue in each muscle fibres?
- skeletal muscles=
- smooth muscles=
- cardiac muscles =
easily fatigure
slowly fatigue
never fatigues
tell wheter intercalated discs are present or not?
1. skeletal muscles=
2. smooth muscles=
3. cardiac muscles =
absent
absent ( but gap and adhering junction presnt which holds the smooth muscle together)
present