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L27 Cardiac and Smooth Muscle: Comparison of Functional Differences

Mer Scott 18 preguntas 5,0 (1 valoración)

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Preguntas del test (18)

  1. 1[blank_start]Skeletal[blank_end] muscle is for movement, posture, and heat. [blank_start]Cardiac[blank_end] muscle is for pumping [blank_start]blood[blank_end]. [blank_start]Smooth[blank_end] muscle is for moving [blank_start]contents of the viscera[blank_end] and has specific functions.
    1. ASkeletal
    2. BCardiac
    3. Cblood
    4. DSmooth
    5. Econtents of the viscera
  2. 2Which of these descriptions matches skeletal muscle?
    1. AVoluntary and specific
    2. BContinuous, involuntary, and unspecific
    3. CInvoluntary and specific
  3. 3Smooth muscle is essential for building pressure in the blood vessels.
    1. AVerdadero
    2. BFalso
  4. 4Which two types of junction are important in cardiac muscle(cardiomyocytes), and what is their nature of connection?
    1. ADesmosomes - Mechanical, Gap junctions - Electrical
    2. BDesmosomes - Electrical, Gap junctions - Mechanical
    3. CGap junctions - Electrical, Tight junctions - Mechanical
    4. DGap junctions - Mechanical, Tight junctions - Electrical
  5. 5Choose the correct statement about the heart.
    1. AThe joining of two myocytes is an intercalated disk.
    2. BPacemaker cells reside in the atrioventricular node
    3. CAn action potential reaching the sinoatrial node will be passed on to the atrioventricular node
    4. DPacemaker cells are stimulus dependant.
  6. 6Choose the correct sequence of steps for contraction of the heart.
    1. ADepolarised atria > septum > apex > ventricles partially, then fully
    2. BDepolarised atria > apex > septum > ventricles partially, then fully
  7. 7Choose the correct statements about contraction of the heart.
    1. AMuscle movements must be coordinated.
    2. BThe ventricles are initially polarised via the Bundles of His after the apex is polarised.
    3. CThe apex is initially polarised via the Bundles of His after the septum is polarised.
    4. DThe depolarisation of the ventricles is initiated via the Purkinje fibres after the septum is polarised.
    5. EThe depolarisation of the ventricles is via the Purkinje fibres after the apex is polarised.
  8. 8The heart can beat outside of the body because of it's own 'mini nervous system.'
    1. AVerdadero
    2. BFalso
  9. 9Choose the incorrect statement about smooth muscle.
    1. ASmooth muscle has actin and myosin, but it is not arranged in sarcomeres
    2. BSmooth muscle allows for large changes in length.
    3. CSmooth muscle is poor at retaining tension.
    4. DSmooth muscle is arranged in bundles by dense bodies
  10. 10Single unit smooth muscle is [blank_start]joined[blank_end] by gap junctions. [blank_start]Only some[blank_end] cells need receptors for neurotransmitters, and the action potential is transferred to all other [blank_start]connected[blank_end] cells. Thus, they work as a single unit. Examples include the digestive, urinary, and reproductive tract walls.
    In multi-unit smooth muscle, there are [blank_start]no gap junctions[blank_end] between cells and [blank_start]all[blank_end] cells have receptors. This allows for finer or more [blank_start]precise[blank_end] muscle control. An example is the muscles in the eye, or the blood vessel s/sheets.
    1. Ajoined
    2. BOnly some
    3. CAll
    4. Dconnected
    5. Eno gap junctions
    6. Fgap junctions
    7. Gall
    8. Hsome
    9. Iprecise

Información

Descripción
• Compare and contrast structural and functional differences between skeletal, cardiac and smooth muscle.
Idioma
English
Visitas
35
Valoración
5,0 de 5 · 1 valoración
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