Neurons and Synapses Quiz

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Nell

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Neurons and Synapses Quiz


Neurons and Synapses QuizVersion en ligne Key terms and definitions par Nell 1 What is the Nervous system? a Electrical signals that travel along neurones. b Specialised cells that transmit electrical impulses in the nervous system. c A network of cells and fibres that transmits nerve impulses between parts of the body. 2 What are Neurones? a A network of cells and fibres that transmits nerve impulses between parts of the body. b Junctions between two neurones where neurotransmitters transmit impulses. c Specialised cells that transmit electrical impulses in the nervous system. 3 What are Nerve impulses? a A long extension of a neurone (axon or dendron). b Electrical signals that travel along neurones. c A fibre that carries impulses towards the cell body. 4 What are Synapses? a Branches extending of dendrons that receive impulses. b Membrane-bound sacs containing neurotransmitters. c Junctions between two neurones where neurotransmitters transmit impulses. 5 What are Receptors? a Sensory structures that detect stimuli. b The central part of the nervous system (brain/spinal cord) that processes information and initiates responses. c A long fibre that carries impulses away from the cell body. 6 What are Effectors? a The very small gap between two neurones at a synapse, 20-30nm wide. b Muscles or glands that carry out a response to a stimulus. c The nucleus and organelles; site of metabolic activity. 7 What is Coordinator? a The neuron that releases neurotransmitters. b The central part of the nervous system (brain/spinal cord) that processes information and initiates responses. c A detectable change in the internal or external environment. 8 What is Stimulus? a The potential difference across the neurone cell surface membrane (-70mV inside relative to outside). b A detectable change in the internal or external environment. c Depolarisation and reversal of potential difference in neurones. 9 What is Response? a A reaction by an effector to a stimulus. b The inside of the neurone becomes positive relative to the outside, reaching a potential difference of around 40mV. c The loss of the resting potential due to sodium ion influx. 10 What is Central nervous system (CNS)? a Transmit impulses from the CNS to effectors. b Transmit impulses from receptors to the CNS. c Comprises the brain and spinal cord; processes information and coordinates responses. 11 What are Motor neurones? a Connect sensory and motor neurones within the CNS. b Transmit impulses from receptors to the CNS. c Transmit impulses from the CNS to effectors. 12 What are Sensory neurones? a Transmit impulses from receptors to the CNS. b Transmit impulses from the CNS to effectors. c The thickened end of the pre-synaptic neurone containing synaptic vesicles. 13 What are Connector neurones? a The very small gap between two neurones at a synapse, 20-30nm wide. b Synapses that increase the likelihood of an action potential. c Connect sensory and motor neurones within the CNS. 14 What is Cell body? a The thickened end of the pre-synaptic neurone containing synaptic vesicles. b The central part of the nervous system (brain/spinal cord) that processes information and initiates responses. c Contains the nucleus and organelles; site of metabolic activity. 15 What part of a neuron receives signals from other neurons? a Dendrites b Soma c Myelin sheath d Axon 16 Which part of the neuron transmits signals away from the cell body? a Soma b Dendrite c Axon d Synapse 17 What is the function of myelin in neurons? a Produce neurotransmitters at the soma b Insulate the axon to speed up signal transmission c Grow new neurons d Anchor the neuron to bones 18 Where are neurotransmitters released? a Axon hillock b Synaptic terminal c Dendritic spine d Soma nucleus 19 Which type of neuron carries signals toward the central nervous system? a Interneuron b Sensory (afferent) neuron c Glial cell d Motor (efferent) neuron 20 What gap separates neurons at the synapse? a Neural crest b Axonal gap c Dendritic gap d Synaptic cleft 21 Which ion influx is crucial for neurotransmitter release? a Magnesium (Mg2+) b Sodium (Na+) c Potassium (K+) d Calcium (Ca2+) 22 Which molecule typically acts as the neuron's electrical signal carrier? a Action potential b Graded potential c Resting potential d Synaptic potential 23 What is the primary role of inhibitory neurotransmitters? a Increase muscle contraction b Release more neurotransmitter c Generate new neurons d Decrease chance of action potential in postsynaptic neuron 24 Which glial cells form myelin in the CNS? a Schwann cells b Oligodendrocytes c Microglia d Astrocytes

Neurons and Synapses Quiz

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Neurons and Synapses QuizVersion en ligne

par Nell

What is the Nervous system?

What are Neurones?

What are Nerve impulses?

What are Synapses?

What are Receptors?

What are Effectors?

What is Coordinator?

What is Stimulus?

What is Response?

What is Central nervous system (CNS)?

What are Motor neurones?

What are Sensory neurones?

What are Connector neurones?

What is Cell body?

What part of a neuron receives signals from other neurons?

Which part of the neuron transmits signals away from the cell body?

What is the function of myelin in neurons?

Where are neurotransmitters released?

Which type of neuron carries signals toward the central nervous system?

What gap separates neurons at the synapse?

Which ion influx is crucial for neurotransmitter release?

Which molecule typically acts as the neuron's electrical signal carrier?

What is the primary role of inhibitory neurotransmitters?

Which glial cells form myelin in the CNS?