Human Bio worksheet
The Muscular System: Skeletal Muscle Tissue
1. Fill in the characteristics of the three muscle types:
Muscle Type
Cardiac
Skeletal
Smooth
Shape of cell Y shaped and are shorter and wider than skeletal muscle cells
Single, very long cylindrica
Single, spindle shaped cells
# of nuclei
1 or 2 multi 1
Striations
yes yes no
Control
The heart
The movement of the body
The intestines like the small and large
2. What attaches muscles to bone? ______Tendon_______________.
3. The whole muscle is composed of muscle cells (fibers) grouped in bundles called __ fascicles
4. Name the connective tissue coverings surrounding the following:
Whole muscle ____ epimysium______________
Fascicles _____ perimysium_____________
Muscle cell __ Endomysium________________
5. Match the following three terms with their definitions:
Sarcolemma sarcoplasmic reticulum - endoplasmic reticulum in muscle cell
Sarcoplasmic reticulum Cytosol - intracellular fluid around organelles
Cytosol sarcolemma - plasma membrane of muscle cell
6. Match the following three terms with their definitions:
Terminal cisternae triad - T-tubule + 2 terminal cisternae
T-tubules t – tubules - part of sarcolemma—carries action potential
Triad terminal cisternae - part of sarcoplasmic reticulum—stores calcium ions
7. Myofibrils consist of contractile proteins called ____myofilaments__
Name the two types and what they’re composed of:
___thin filament composed of _____actin______________
_thick filament_____ composed of _____myosin______________
8. Arrangement of myofilaments. Give the letter name of each band:
Dark band __A_ band
Light band _I__ band
Match two definitions with each band:
I - contains only thin filaments
A - contains both thick and thin filaments
A - defined by length of thick filament
I - defined as distance between two thick filaments
9. Define the following terms:
Z line (disc) __ any of the dark bands across a striated muscle fiber
1. Fill in the characteristics of the three muscle types:
Muscle Type
Cardiac
Skeletal
Smooth
Shape of cell Y shaped and are shorter and wider than skeletal muscle cells
Single, very long cylindrica
Single, spindle shaped cells
# of nuclei
1 or 2 multi 1
Striations
yes yes no
Control
The heart
The movement of the body
The intestines like the small and large
2. What attaches muscles to bone? ______Tendon_______________.
3. The whole muscle is composed of muscle cells (fibers) grouped in bundles called __ fascicles
4. Name the connective tissue coverings surrounding the following:
Whole muscle ____ epimysium______________
Fascicles _____ perimysium_____________
Muscle cell __ Endomysium________________
5. Match the following three terms with their definitions:
Sarcolemma sarcoplasmic reticulum - endoplasmic reticulum in muscle cell
Sarcoplasmic reticulum Cytosol - intracellular fluid around organelles
Cytosol sarcolemma - plasma membrane of muscle cell
6. Match the following three terms with their definitions:
Terminal cisternae triad - T-tubule + 2 terminal cisternae
T-tubules t – tubules - part of sarcolemma—carries action potential
Triad terminal cisternae - part of sarcoplasmic reticulum—stores calcium ions
7. Myofibrils consist of contractile proteins called ____myofilaments__
Name the two types and what they’re composed of:
___thin filament composed of _____actin______________
_thick filament_____ composed of _____myosin______________
8. Arrangement of myofilaments. Give the letter name of each band:
Dark band __A_ band
Light band _I__ band
Match two definitions with each band:
I - contains only thin filaments
A - contains both thick and thin filaments
A - defined by length of thick filament
I - defined as distance between two thick filaments
9. Define the following terms:
Z line (disc) __ any of the dark bands across a striated muscle fiber