Muscle cells 8

advertisement
Muscle cell
Same same but different
Muscle cell
Other organismal cells
sarcoplasm
cytoplasm
sarcoplasmic reticulum
smooth endoplasmic reticulum (SER)
sarcosome
mitochondrion
sarcolemma
cell membrane
New terminology



So these new words are nothing new to you,
they only have different words
The reason is it is a specialized cell with special
functions
Most importantly it needs to be able to contract
Three different muscles

Striated muscle cell

Cardiac muscle cell

Smooth muscle cell
Smooth muscle

Smooth muscle is not under voluntary control

It is not as highly organized as the other types

You'll find this in arteries, guts, urinebladder,
Uterus, respiratory tract and reproductive tract
Examples of smooth muscle cells
Striated muscle cell

Features a repeated unit called sarcomere

Is highly organized

Control is voluntary (except for heart cells)



All (except heart) is somehow attached to
skeleton
Have several nucleus and not placed in the
centre
Myofibrils are consisting of repeating segments
of sarcomeres – long fibrous proteins
Build up of Striated muscle
Sarcomere

This is how it looks under microscope
Cardiac cells

Striated muscle

Not voluntary control

Central nuclei as opposed to striated cells

Usually only one nucleus (up to 4)

High mitochondrial density (why???)
Download
Related flashcards
Create Flashcards