Muscle tissue practice questions

What tissue is this?

Smooth muscle tissue

What are two alternative names for this tissue?

1. Involuntary, non-striated muscle

2. Visceral muscle


Cardiac muscle tissue

Where is this tissue found?

Walls of the heart (the “myocardium”)


Skeletal muscle tissue

Describe the myofibril arrangement in this tissue.

Dense, orderly arrangement producing dark striations



Describe the “cell type” for this tissue

Elongated, tapered fibers arranged as bundles, sheets, or

cords



What degree of control do we have over this tissue type?

Voluntary control



What are two alternative names for this tissue?

1. Involuntary, striated muscle2. Heart muscle



Describe the nuclear arrangement for this tissue.

One nucleus in the center of the cell



Describe the vascular supply for this tissue.

Dense capillary network, continuous supply



Where is this tissue found in the human body?

Usually attached to the bones of the skeleton on one or both ends.




Multiple, peripheral nuclei




Good blood supply, but highly variable



What microscopic “view” is seen in this picture?

Cross-section (short axis)



Describe the “cell type” for this tissue.

Short fibers which form a branching & weaving network

with intercalated discs



How does this muscle tissue rank against the other two for blood

supply?

Ranks 2nd



Describe the contraction of this muscle tissue.

Rhythmic, powerful, yet slow to contract & relax



What is an alternative name for this muscle tissue?

Voluntary, striated muscle



What identifying characteristics (list primary & secondary) are

visible in this slide?

• 1. Primary – multiple, peripheral nuclei

• 2. Primary – long, cylindrical, parallel fibers

• 3. Secondary – dark striations




Dense (but less than skeletal), orderly producing faintly visible

striations




supply?

Ranks 3rd



What microscopic “view” is seen in this picture?

Longitudinal section (long axis)



What are the “darker” lines called?

Intercalated discs



Describe the “cell type” for this tissue.

Long, cylindrical, parallel fibers arranged as bundles within

bundles




Involuntary control




One (sometimes two in larger cells) nucleus in center of cell


Bloodvessel



Good blood supply, varies with activity




Rhythmic, rapid, repeating, fibers show coordinated contraction



Where is this tissue found?

Walls of Internal Organs


http://www.siumed.edu/~dking2/ssb/NM016b.htm




Vigorous, short duration,fibers contract independently (fatigue

easily)






Least dense, random arrangement producing no visible

striations




supply?

Ranks 1st




Involuntary control



What is the most prominent identifying characteristic visible?

Intercalated discs



What is the “striped” or “banded” look seen in this slide called?

Striated or striations



Name an organ in the body where this tissue can be found.

Walls of stomach, intestines, esophagus, bladder, uterus,

arteries, and more



The cell membrane of the tissue is called what?

Sarcolemma




Only found in the walls of the heart called the myocardium



What are these?

Multiple, peripheral nuclei




Name any muscle from the quiz lists such as biceps brachii,

trapezius, deltoid, etc.



Are there visible striations in this picture?

Yes


http://biodidac.bio.uottawa.ca/Thumbnails/showimage.cfm?File_name=B32-8F13&File_type=GIF


What is the structure between these arrows called?

http://biodidac.bio.uottawa.ca/Thumbnails/showimage.cfm?File_name=B32-8F13&File_type=GIF

The arrows point to the Z-lines. That makes what is between

them a sarcomere.



This tissue has parallel fibers, so why isn’t it skeletal muscle

tissue?

Intercalated discs visible; single, centered nucleus per cell visible;

light striations visible


Smooth muscle tissue (cross section)


Cardiac muscle tissue (cross section)














Skeletal muscle tissue (cross section)











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Muscle tissue practice questions