In this article, we will solve 10 MCQs on Biomechanics (Part-I). So let’s get started.
Questions and Answers (Correct answers in bold)
Q1. The resting membrane potential if skeletal muscle fiber is:
- -90 mV
- -0.9 mV
- -0.09 mV
- -0.009 mV
Q2. Conduction of nerve impulses is faster in myelinated nerve because of:
- Uninterrupted flow of impulse
- Saltatory conduction
- Circular current flow
- Quick reversal of current flow
Q3. Cardiac muscles ability to regenerate is:
- Partial
- None
- Full and complete
- Variable
Q4. Presence of muscle fibrillation indicates which of the following:
- Hyperexcitability of motor unit
- High neural discharge rate
- Loss of muscle innervation
- Upper motor neuron defect
Q5. Which type of contraction occurs when the force of the muscles is less than the resistance:
- Concentric
- Eccentric
- Isometric
- Isokinetic
Q6. The cross-section of muscle is equal to:
- Length × width
- Length × 1/2 thickness
- 2(thickness) ÷ 2(width)
- Width × thickness
Q7. During rest the flow of blood to muscle is:
- 3-4 mL/100 gm/min
- 3-4 mL/100 gm/sec
- 3-4 mL/10 gm/30 sec
- 3-4 mL/1000 gm/min
Q8. One of the function of basal ganglia is to:
- Increase the muscle tone
- Produce small jerky movements
- Inhibit stretch reflex
- Control auditory function
Q9. A patient who recently sustained a gastronemius strain asks a therapist what factors may have contributed to the muscle strain. Which statement does not accurately describe contributing factors to a muscle strain:
- The muscle may have been poorly prepared due to inadequate warm-up
- The muscle may have been weakened by a previous injury
- The muscle may have been exposed to heat which would cause the muscle to be less contractile than normal
- The muscle may previously have been extensively injured with resultant scar tissue formation
Q10. A 23-year-old suffered from spinal cord injury while rock-climbing and is independent in transfers with assistive devices most likely spinal cord level involved is:
- C5
- C6
- C7
- T1
(Note: Correct answers in bold)