Sample Physiology MCQs
Sample Physiology MCQs
1. Compound action potentials can be graded responses. True
2. The sciatic nerve contains axons of both afferent and efferent neurones. True
3. The absolute refractory period of an action potential is the period after an initial stimulus when it is impossible to evoke another action potential with a second stimulus. True
4. The refractory periods of individual axons are important as they dictate the maximal action potential firing rate of a neuron. True
5. Compound action potentials represent the algebraic sum of several individual action potentials being evoked at approximately the same time in a compound nerve. TRUE
6. Intracellular electrical recording is often used as a tool for diagnosing problems with nerve conduction such as carpal tunnel syndrome TRUE
7. The sciatic nerve is the shortest mixed nerve in the frog. False- longest
8. Within any given type of nerve fibre (myelinated or unmyelinated), conduction velocity is faster in large diameter fibres than in small diameter fibres. True
9. Conduction velocity in an axon is proportional to the strength of the stimulus. True
10. When recording a compound action potential from a nerve the threshold stimulus voltage represents the voltage at which the most excitable axons reach firing threshold. True
11. The relative refractory period roughly coincides with the period of action potential after hyperpolarisation. True
12. Intracellular fluid is sub extracellular fluid. True
13. The neuromuscular junction (NMJ) is a synapse. true
14. The action potential in skeletal muscle travels through the muscle via T-tubules true
15. Ca2+ is essential for normal contraction of skeletal muscle. true
16. A twitch of one skeletal muscle fibre is an example of a graded response. TRUE
17. A motor unit is a single motor neurone and the muscle fibres that it innervates. true
18. The three phases of a muscle twitch are described as latent, contraction and relaxation. true
19. The force exerted on an object by
1. Compound action potentials can be graded responses. True
2. The sciatic nerve contains axons of both afferent and efferent neurones. True
3. The absolute refractory period of an action potential is the period after an initial stimulus when it is impossible to evoke another action potential with a second stimulus. True
4. The refractory periods of individual axons are important as they dictate the maximal action potential firing rate of a neuron. True
5. Compound action potentials represent the algebraic sum of several individual action potentials being evoked at approximately the same time in a compound nerve. TRUE
6. Intracellular electrical recording is often used as a tool for diagnosing problems with nerve conduction such as carpal tunnel syndrome TRUE
7. The sciatic nerve is the shortest mixed nerve in the frog. False- longest
8. Within any given type of nerve fibre (myelinated or unmyelinated), conduction velocity is faster in large diameter fibres than in small diameter fibres. True
9. Conduction velocity in an axon is proportional to the strength of the stimulus. True
10. When recording a compound action potential from a nerve the threshold stimulus voltage represents the voltage at which the most excitable axons reach firing threshold. True
11. The relative refractory period roughly coincides with the period of action potential after hyperpolarisation. True
12. Intracellular fluid is sub extracellular fluid. True
13. The neuromuscular junction (NMJ) is a synapse. true
14. The action potential in skeletal muscle travels through the muscle via T-tubules true
15. Ca2+ is essential for normal contraction of skeletal muscle. true
16. A twitch of one skeletal muscle fibre is an example of a graded response. TRUE
17. A motor unit is a single motor neurone and the muscle fibres that it innervates. true
18. The three phases of a muscle twitch are described as latent, contraction and relaxation. true
19. The force exerted on an object by