A
– is derived from the myotome; B – consists of striated muscle fibres; C – connective
tissue surrounds each fibre; D
– possesses satellite cells; E – muscle fibres are joined by
intercalated discs.
2. Each of the following statements concerning the smooth muscle tissue is true,
EXCEPT:
A
– is derived from the mesenchyme; B – consists of muscle fibres; C – consists of muscle
cells; D
– its cells lack cross striation; E– its contraction is involuntary.
3. Each of the following statements concerning the cardiac muscle tissue is true,
EXCEPT:
A
– consists of muscle symplasts; B – consists of muscle cells; C – is striated; D – is
derived from the mesoderm; E
– its cells are joined by intercalated discs.
4. Each of the following statements concerning the striated myofibril is true,
EXCEPT:
A
– consists of thick and thin filaments; B – contains actin and myosin; C – includes
myoglobin; D
– has dark and light bands; E – is subdivided into sarcomeres.
5. The main stages of the skeletal muscle tissue embryonic development are as
follows, EXCEPT:
A
– myoblasts arise from the myotome; B – myoblasts arise from the sclerotome; C –
myoblasts fuse; D
– myotubes result from fusion of myoblasts; E – muscle fibres
differentiate from myotubes.
6. Each of the following statements concerning the sarcotubular system is true,
EXCEPT:
A
– includes T tubules; B – includes sER (L tubules); C – forms triads; D – produces
proteins; E
– contains terminal cisterns.
7. Each of the following statements concerning the smooth muscle cell is true,
EXCEPT:
A
– contains one nucleus; B – is surrounded by the basal lamina and reticular fibres; C –
contains actin and myosin; D
– is joined with other cells by nexuses; E – contains T
tubules.
8. Each of the following statements concerning the red muscle fibres is true,
EXCEPT:
A
– contain a large amount of myoglobin; B – possess numerous mitochondria; C – are
rich in oxidative enzymes; D
– are adapted to fast short-lived contractions; E – show mild
ATP-ase cytochemical staining.
9. Each of the following statements concerning the white muscle fibres is true,
EXCEPT:
A
– contain a large amount of glycogen; B – contain few mitochondria; C – are adapted to
slow repetitive contractions; D
– show marked ATP-ase cytochemical staining; E – are not
rich in oxidative enzymes.
10. The typical cardiac muscle cells contain the following structures, EXCEPT:
A
– one or two nuclei; B – many mitochondria; C – striated myofibrils; D – T tubules; E –
pinocytotic vesicles.
11. The muscle cells producing hormones are:
A
– atypical cardiac myocytes; B – smooth myocytes; C – atrial myocytes; D – satellite
cells; E
– none of them.
12. Each of the following statements concerning the striated myofibril structure is
true, EXCEPT:
A
– A band is anisotropic; B – I band is isotropic; C – Z line bisects I band; D – H zone
transects I band; E
– H zone has a dark M line in its centre.
13. Each of the following statements concerning striated myofibrils is true, EXCEPT:
A
– include thick and thin filaments; B – lack crossbanding; C – run parallel to the long axis
of fibre through its entire length; D
– are held by intermediate filaments from desmin and
vimentin; E
– are surrounded by the sarcoplasmic reticulum.