Neurons and Synapses (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
What type of signal do neurons carry throughout the body?
What type of signal do neurons carry throughout the body?
Electrical impulses
What is the function of the axon in a neuron?
What is the function of the axon in a neuron?
Carries impulses away from cell body
What is the function of the myelin sheath?
What is the function of the myelin sheath?
Insulates & speeds up transmission
Where do sensory neurons carry electrical impulses?
Where do sensory neurons carry electrical impulses?
From sense organs to CNS
Where do motor neurons carry electrical impulses?
Where do motor neurons carry electrical impulses?
From CNS to effectors
Which characteristic applies to interneurons?
Which characteristic applies to interneurons?
Not covered by myelin sheaths
What is the correct sequence of information flow in the nervous system?
What is the correct sequence of information flow in the nervous system?
Sensory→Interneurons→Motor
What is the synaptic cleft?
What is the synaptic cleft?
The gap between two neurons
What chemical messengers are released at synapses?
What chemical messengers are released at synapses?
Neurotransmitters
What is acetylcholine crucial for?
What is acetylcholine crucial for?
Muscle function, memory & learning
What conditions are linked to low dopamine levels?
What conditions are linked to low dopamine levels?
Depression & Parkinson's disease
What is the main function of endorphins?
What is the main function of endorphins?
Natural painkillers & mood boosters
How fast do reflex actions occur compared to conscious responses?
How fast do reflex actions occur compared to conscious responses?
0.15 seconds vs 0.5 seconds