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 is the basic function of a neuron?
What is the basic function of a neuron?
Carries electrical signals
What is the main function of the axon?
What is the main function of the axon?
Carries impulses away from cell body
What does the myelin sheath do?
What does the myelin sheath do?
Insulates impulses, speeds transmission
Where do sensory neurons carry impulses?
Where do sensory neurons carry impulses?
From sense organs to CNS
What do motor neurons connect to?
What do motor neurons connect to?
Effectors (muscles or glands)
Which neuron type lacks a myelin sheath?
Which neuron type lacks a myelin sheath?
Interneurons
What is the synaptic cleft?
What is the synaptic cleft?
Gap between two neurons
What happens when an impulse reaches the axon terminal?
What happens when an impulse reaches the axon terminal?
Neurotransmitters are released
What is acetylcholine crucial for?
What is acetylcholine crucial for?
Muscle function, memory, learning
Low dopamine levels are linked to which conditions?
Low dopamine levels are linked to which conditions?
Depression and Parkinson's disease
How do endorphins act as natural painkillers?
How do endorphins act as natural painkillers?
By blocking pain signals
How fast do reflex actions occur?
How fast do reflex actions occur?
0.15 seconds
What effect does exercise have on neurotransmitters?
What effect does exercise have on neurotransmitters?
Increases dopamine and endorphins