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Hutan Ajaib
Main Pasukan
Universiti
sains

Neuromuscular Junction

MASPAITILLA MA
27
0
Masalah tambahan (13/ 20)
Allow incorrect answer
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masalah 1

pilihan

During muscle contraction, what role does calcium play?

  • It binds to actin to initiate contraction
  • It binds to troponin complex, allowing myosin head to bind to actin
  • It provides energy for muscle contraction
  • It breaks down ATP

masalah 2

jawapan pendek

What is the primary neurotransmitter released at the neuromuscular junction?

  • Acetylcholine

  • acetylcholine

masalah 3

pilihan

What is the function of the enzyme acetylcholinesterase at the neuromuscular junction?

  • Synthesize acetylcholine
  • Break down acetylcholine
  • Convert ATP to ADP
  • Bind to nicotinic receptors

masalah 4

pilihan

What is the role of calcium ions at the neuromuscular junction?

  • Initiate action potential
  • Facilitate acetylcholine release
  • Break down neurotransmitters
  • Bind to muscle fibers

masalah 5

pilihan

Which structure in the muscle fiber is responsible for propagating the action potential?

  • Myofibril
  • Sarcoplasmic reticulum
  • T-tubule
  • Mitochondria

masalah 6

pilihan

What is the synaptic cleft?

  • The gap between two neurons
  • The gap between neuron and muscle fiber
  • The space within the neuron
  • The gap between muscle fibers

masalah 7

pilihan

Which ion channel opens in response to the action potential in the presynaptic neuron at the neuromuscular junction?

  • Potassium
  • Sodium
  • Calcium
  • Chloride

masalah 8

jawapan pendek

Which enzyme breaks down acetylcholine in the synaptic cleft?

  • Acetylcholinesterase

  • acetylcholinesterase

masalah 9

pilihan

What structure in the muscle cell receives the signal from the motor neuron?

  • Sarcoplasmic reticulum
  • Myofibril
  • Motor end plate
  • T-tubule

masalah 10

pilihan

Which ion channel opens first when an action potential reaches the neuromuscular junction?

  • Voltage-gated Potassium channels
  • Voltage-gated Calcium channels
  • Voltage-gated Sodium channels
  • Ligand-gated Ion channels

masalah 11

pilihan

What is the primary function of the neuromuscular junction?

  • Sensory signal transmission
  • Chemical digestion
  • Signal transmission from nerve to muscle
  • Blood filtration

masalah 12

jawapan pendek

Which ion is crucial for triggering the release of acetylcholine into the synaptic cleft?

  • Calcium

masalah 13

jawapan pendek

What is the gap called between the nerve ending and the muscle fiber at the neuromuscular junction?

  • Synaptic cleft

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