Histology muscle tissues

By muscle contraction the length of the I-discus is diminished whereas the A-discus is unchanged
a. yes
b. no

a. yes

"Sarcomere "is a concept designated to the part of the myofibril between two Z- lines.
a. yes
b. no

a. yes

Leiomyofibre is the cell specific for the striated muscle tissue
a. yes
b. no

b. no

The intercalated discs are localized in the cardiac muscle tissue.
a. yes
b. no

a. yes

Z - line (telophragma) is in the middle of the I- discus of the myofibril.
a. yes
b. no

a. yes

The loose connective tissue plays a role of intercellular substance for the muscle tissue
a. yes
b. no

a. yes

MULTIPLE CHOICE - ONE CORRECT ANSWER
the myofibril is:
a/ specialized cell organelle
b/ cell
c/ syncytium
d/ symplast

a/ specialised cell organelle

MULTIPLE CHOICE - ONE CORRECT ANSWER
Under electron microscope in H - band of the myofibril are observed:
a/ thin myofilaments
b/ thick myofilaments
c/ thin and thick myofilaments
d/ no myofilaments

b/ thick myofilaments

MULTIPLE CHOICE - ONE CORRECT ANSWER
The nuclei of the striated myofibre are localized:
a/ in the central part of the cytoplasm
b/ sublemmal (under the plasma membrane)
c/ without strict localization
d/ along the bundles of myofibrils

b/ sublemmal (under plasma membrane)

MULTIPLE CHOICE - ONE CORRECT ANSWER
The intercalated discs between the cardiomyocytes are localized:
a/ step-like
b/ under the plasma membrane
c/ without strict localization
d/ along the bundles of cardiomyofibrils

a/ step-like

MULTIPLE CHOICE - ONE CORRECT ANSWER
Under electron microscope in I-disc of the myofibril are observed:
a/ thin myofilaments
b/ thick myofilaments
c/ thin and thick myofilaments
d/ no myofilaments

a/ thin myofilaments

MULTIPLE CHOICE - ONE CORRECT ANSWER
The cardiomyocytes bind together through:
a/ interdigitations (*zipper" interlocking)
b/ intercalated discs
c/ hemi-desmosomes
d/ basal lamina

b/ intercalated discs

MULTIPLE CHOICE - ONE CORRECT ANSWER
Under electron microscope A-disc of the myofibril are observed:
a/ thin myofilaments
b/ thick myofilaments
c/ thin and thick myofilaments
d/ no myofilaments

c/ thin and thick myofilaments

MULTIPLE CHOICE - ONE CORRECT ANSWER
The cardiomyofibrils in the cells of impulse-conductive muscle tissue:
a/ are scanty and centrally placed in the cell
b/ fill the whole cell cytoplasm
c/ are scanty and peripherally placed in the cell
d/ are lacking

c/ are scanty and peripherally placed in the cell

MULTIPLE CHOICE - ONE CORRECT ANSWER
The sarcosomes in the muscle tissue cells are:
a/ phagosomes
b/ mitochondria
c/ lysosomes
d/ cell inclusions

b/ mitochondria

MULTIPLE CHOICE - ONE CORRECT ANSWER
Myoepithelial cells are localized:
a/ in the wall of some acini
b/ in the blood vessels wall
c/ in the skeletal muscles
d/ in the wall of the seminiferous tubules

a/ in the wall of some acini

MULTIPLE CHOICE MORE THAN ONE CORRECT ANSWER
the most specific features of the muscle tissue are:
a/ abundant intercellular substance
b/ numerous blood vessels and nerve endings
c/ of lack of proper intercellular substance
d/ presence of three types of microscopic organization
e/ presence of tonofibrils

b/ numerous blood vessels and nerve endings
c/ of lack of proper intercellular substance
d/ presence of three types of microscopic organization

MULTIPLE CHOICE MORE THAN ONE CORRECT ANSWER
Which of the following is specific for the striated skeletal muscle tissue:
a/ presence of striated myofibrils
b/ presence of smooth myofibrils
c/ symplast type of organization
d/ syncytial type of organization
e/ origin from the mesoblast

a/ presence of striated myofibrils
c/ symplast type of organisation
e/ origin from mesoblast

MULTIPLE CHOICE MORE THAN ONE CORRECT ANSWER
Which of the following is specific for the smooth muscle tissue:
a/ presence of striated myofibrils
b/ presence of smooth myofibrils
c/ cellular type of organization
d/ origin from the mesenchyme
e/ origin of the mesoblast

b/ presence of smooth myofibrils
c/ cellular type of organisation
d/ origin from the mesenchyme

MULTIPLE CHOICE MORE THAN ONE CORRECT ANSWER
The intercalated discs of the cardiac muscle tissue consist of:
a/ "zipper" interlocking (interdigitatio)
b/ gap junctions (nexus)
c/ tight junctions (zonula occludens)
d/ hemi-desmosomes
e/ desmosomes

b/ gap junctions
e/ desomsomes

DEFINE AND FILL IN THE CORRECT ANSWERS
the triad of the striated myofibril consists of:
a.
b.

a. T systems
b. 2L systems

DEFINE AND FILL IN THE CORRECT ANSWERS
what is the embryonic origin of:
a/ smooth muscle tissue
b/ skeletal striated muscle tissue
c/ cardiac straited muscle tissue
d/ myoepithelial cells

a/ mesenchyme
b/ mesoblast
c/ mesoblast
d/ skin ectoblast

DEFINE AND FILL IN THE CORRECT ANSWERS
the following proteins are present in the striated myofibrils:
a.
b.
c.
d.

a. actin
b. myosin
c. tropomyosin
d. troponin

DEFINE AND FILL IN THE CORRECT ANSWERS
the following types of the muscle tissue are innervated by the vegetative nervous system
a.
b.

a. smooth
b. cardiac

DEFINE AND FILL IN THE CORRECT ANSWERS
for the smooth muscle tissue the type of microscopic organisation is specific and the nuclei are localised in the ____ part of the cells

• cellular
• central

DEFINE AND FILL IN THE CORRECT ANSWERS
the main contractile unit of the striated myofibrils is which is localised between lines

• sarcomere
• two Z lines

GIVE THE CORRECT ANSWER
Under the light microscope - (H- E staining), bundles of striated cylindrical structures with numerous peripherally placed nuclei are visible.
What type of muscle tissue is this?

striated skeletal muscle tissue

Under the light microscope - (H- E staining), long cells with centrally placed spherical nuclei, divided into two or more branches at its ends appear. Between the adjacent cells, dark lines pass in an irregular, step-like manner.
What type of muscle tissue is this?

striated cardiac muscle tissue

Associate each type of muscle tissue with its corresponding features:
a/ smooth muscle tissue
b/ cardiac striated muscle tissue
c/ skeletal striated muscle tissue

a/

• presence of smooth myofibrils
• cellular type of microscopic organisation

b/

• presence of cardiac myofibrils
• syncytial type of microscopic organisation

c/

• presence of striated myofibrils
• symplast type of microscopic organisation

Under the light microscope - (H- E staining), elongated (spindle-shaped) cells with centrally placed nuclei, arranged in layers are observed.
What type of muscle tissue is this?

smooth muscle tissue