1) Characters of Local potential:

C) Associated with decremental conduction.

2) Alactic oxygen debt:

B) Used to replenish ATP stores

3) Moderate training, long duration swimming:

A) Increase number of capillaries.

C) Increase number of mitochondria.

4) Isotonic Contraction:

C) Mechanical efficiency is Zero.

5) Smooth muscle Contraction:

C) At first, Tension increases then decreases.

8) Skeletal muscle contraction:

B) Bending of Cross bridges donot need ATP.

7) All are characteristics of single unit smooth muscle except:

B) Spontaneous electric activity

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nerve and muscle

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11) Characters of Local potential:
1. AA) Cannot be graded.
2. BB) Followed by ARP
3. CC) Associated with decremental conduction.
4. DD) Cannot be summated.
22) Alactic oxygen debt:
1. AA) Uses greater amount of O2
2. BB) Used to replenish ATP stores
3. CC) Takes 1 hour or more
4. DD) All of the above
33) Moderate training, long duration swimming:
1. AA) Increase number of capillaries.
2. BB) Increase myoglobin.
3. CC) Increase number of mitochondria.
4. DD) All of the above.
44) Isotonic Contraction:
1. AA) Tension is constant.
2. BB) Muscle length decreases.
3. CC) Mechanical efficiency is Zero.
4. DD) A + B.
55) Smooth muscle Contraction:
1. AA) Needs Calmodulin.
2. BB) Has Low ATPase activity
3. CC) At first, Tension increases then decreases.
4. DD) All of the above.
66) Nerve Excitability is increased by:
1. AA) Hyperkalemia
2. BB) Hypercalcemia
3. CC) Hyponatremia
4. DD) A + C.
77) During rest, Voltage gated Na channels:
1. AA) m gate close, h gate close.
2. BB) m gate close, h gate open
3. CC) m gate open, h gate open
4. DD) n gate open.
88) Skeletal muscle contraction:
1. AA) Ca binds to Troponin T
2. BB) Bending of Cross bridges donot need ATP.
3. CC) A band shortens
4. DD) Ca release from SR.
99) Smooth muscle contraction is enhanced by:
1. AA) Acetyl choline
2. BB) Progesterone
3. CC) Norepinephrine
4. DD) A + B
107) All are characteristics of single unit smooth muscle except:
1. AA) Unstable RMP.
2. BB) Spontaneous electric activity
3. CC) Nonrhythmic
4. DD) Obey all or None law

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Descrição: medicate and innovate ( for service the medical student) group
Autor: Nada Medhat
Idioma: English
Visualizações: 45
Etiquetas: we can do it medicine physiology mcq educación secundaria
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nerve and muscle

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