Neuromuscular System-sem 2 Yr 1
Test one for the neuromsk skel syst 2010 semester 2
- 1.Where and when does the myosin crossbridge attach?
- A.
On troponin when calcium is low
- B.
On troponin c when calcium is high
- C.
On actin when calcium is high
- D.
On the sarcomere when sodium is high
- E.
On actin when calcium is low
- 2.Fiber types within the skeletal muscle generating force and movement are?
- A.
Intrafusal
- B.
Thick filament
- C.
Extrafusal
- D.
Thin filament
- E.
Nuclear chain fibers
- 3.What does the process of active state require?
- A.
Extracellular calcium increase
- B.
Intracellular calcium increase
- C.
Intracellular calcium increase and ATP
- D.
Extracellular calcium decrease
- E.
ATP
- 4.Contraction is the result of:
- A.
An incease number of crossbridge attachments
- B.
Calcium at its basal level
- C.
An increase of actin filaments
- D.
Decreasing extracellular calcium
- E.
Loss of ATP
- 5.Where is the storage facility of ATP in the sarcomere?
- A.
Calcium
- B.
Sodium
- C.
Actin
- D.
Myosin
- E.
Troponin C
- 6.If the muscle ends are clamped at a fixed length prior to the contraction, and the muscle length cannot decrease as the muscle's cell contract, is it :
- A.
Concentric contraction
- B.
Isotonic contraction
- C.
Eccentric contraction
- D.
Auxotonic contraction
- E.
Isometric contraction
- 7.What is the signal for contraction?
- A.
Sodium
- B.
Actin
- C.
Myosin
- D.
Calcium pulse
- E.
Twitch
- 8.What second messenger is involved in the binding of myosin to actin in skeletal muscle and cardiac muscle
- A.
Calcium
- B.
Tropomyosin
- C.
Troponin c
- D.
Myosin
- E.
ATP
- 9.When is ATP initially used in the crossbridge cycle?
- A.
In rigor mortis
- B.
In relaxation
- C.
In excitation
- D.
In hydrolysis
- E.
In product release
- 10.What is the most efficient method of ATP generation?
- A.
Glycolysis
- B.
Phosphorylation
- C.
Gluconeogenesis
- D.
Oxidation of fatty acids
- E.
Chemiosmosis
- 11.A muscle showing to have a slow myosin isoenzyme (ATPase rate)/contraction timemoderate Sr pump capacitymoderate diffusion diametersmall motor neuron sizehigh oxidative capacity:mt content, capillary density,myoglobin contenthigh fatigue resistancemoderate glycolytic capacitylow forceaerobic activitytriglycerides as storage fuelis what type?
- A.
Type 11B/ fg/ ft-b/fast glycolytic/white
- B.
Type 11A/fog/ft-a/fast oxidative/red
- C.
Type 1/so/slow oxidative/white
- D.
Type 1A/fog/ft-a/fast oxidative/red
- E.
Type 2/so/slow oxidative/white
- 12.A muscle showing to have a very fast myosin isoenzyme (ATPase rate)/contraction timehigh Sr pump capacityhigh diffusion diametervery large motor neuron sizelow oxidative capacity:mt content, capillary density,myoglobin contentlow fatigue resistancehigh glycolytic capacityvery high forceshort term aerobic activitycp,O2 as storage fuelis what type?
- A.
Type 11B/ fg/ ft-b/fast glycolytic/white
- B.
Type 11A/fog/ft-a/fast oxidative/red
- C.
Type 1/so/slow oxidative/white
- D.
Type 1A/fog/ft-a/fast oxidative/red
- E.
Type 2/so/slow oxidative/white
- 13.A muscle showing to have a fast myosin isoenzyme (ATPase rate)/contraction timehigh Sr pump capacitysmall diffusion diameter large motor neuron sizevery high oxidative capacity:mt content, capillary density,myoglobin contentmedium fatigue resistancehigh glycolytic capacityv high forcelong term aerobic activitycp,O2 as storage fuelis what type?
- A.
Type 11B/ fg/ ft-b/fast glycolytic/white
- B.
Type 11A/fog/ft-a/fast oxidative/red
- C.
Type 1/so/slow oxidative/white
- D.
Type 1A/fog/ft-a/fast oxidative/red
- E.
Type 2/so/slow oxidative/white
- 14.After a muscle relaxes and the compression of the vessels are relieved there is a sustained increase in blood flow. This is called?
- A.
Hypertrophy
- B.
Hypoxia
- C.
Maximal voluntary contraction
- D.
Reactive hyperemia
- E.
Hyporemia
- 15.Energy expenditure that is greater than oxidative resupply of enegy during exercise is called:
- A.
Oxygen deficit
- B.
Oxygen debt
- C.
Hypoxia
- D.
Hyperemia
- E.
Oxygen depletion
- 16.Which motor units are recruited first?
- A.
Small
- B.
Type 2
- C.
Medium
- D.
Type 1
- E.
Large
- 17.Which is not a primary cause of cellular fatigue in the muscle cell?
- A.
Increased intracellular ADP
- B.
Metabolic waste- lactic acid and phosphate
- C.
Slowed type 2 motor units
- D.
Depletion of ACh
- E.
Increased intracellular potassium
Questions: 20 | Attempts: 20464 | Last updated: Mar 22, 2022
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Sample QuestionWhat are the points of origin and insertion for the LATISSIMUS DORSI muscle?
Questions: 11 | Attempts: 12464 | Last updated: Mar 21, 2022
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Questions: 11 | Attempts: 10386 | Last updated: Mar 22, 2022
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