| Date | November 2015 | Marks available | 1 | Reference code | 15N.1.HL.TZ0.23 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 23 | Adapted from | N/A |
Question
What happens first when a neurotransmitter binds to a postsynaptic neuron?
A. Ions diffuse
B. Electrophoresis begins
C. Ca2+ channels open
D. Repolarization
Markscheme
A
Examiners report
[N/A]
Syllabus sections
Show 53 related questions
- 17N.1.HL.TZ0.24: What happens when an action potential reaches motor end plates? A. Calcium ions are absorbed...
- 17N.1.SL.TZ0.28: Which structure in the motor neuron is required for saltatory conduction? [Source:...
- 17M.2.HL.TZ1.1f.ii: Suggest a reason for the greater expression of the gene for the urea transporter after an...
- 17M.2.SL.TZ1.1c: Estimate how much smaller drilled oysters raised in seawater at a high CO2 concentration were...
- 17M.1.SL.TZ2.29: If schizophrenia is caused by an overabundance of the neurotransmitters dopamine and...
- 17M.1.SL.TZ2.27: The bacterium Neisseria gonorrhoeae causes infections related to the human reproductive...
- 17M.1.SL.TZ1.25: Neurotransmitters are released into the synaptic cleft from the presynaptic neuron and travel...
- 17M.1.SL.TZ1.24: The diagram below shows part of the membrane of a neuron. What stage of the action potential...
- 17M.1.SL.TZ1.21: Cladograms can be created by comparing DNA or protein sequences. The cladogram on the left is...
- 16M.2.HL.TZ0.3c: Resistance to neonicotinoid pesticides has been observed in some insects....
- 16M.2.HL.TZ0.3b: All motor neurons use acetylcholine to activate skeletal muscle. Explain the effect of...
- 16M.2.SL.TZ0.5c: Explain the propagation of electrical impulses along a neuron including the role of myelin.
- 16N.1.HL.TZ0.24: The decline in European honeybee (Apis mellifera) populations may be linked to neonicotinoid...
- 16M.1.HL.TZ0.16: What is the mechanism of sodium-potassium pumps in neurons that generates a resting potential...
- 15M.1.HL.TZ1.21: What is a feature of neurons?A. Relay neurons transmit impulses from motor to sensory...
- 15M.1.SL.TZ2.29: What characterizes type I diabetes?A. It can be controlled by diet alone.B. Risk factors such...
- 15M.2.SL.TZ2.7c: Nerves connecting the brain and heart contain neurons that control heart rate. Explain how a...
- 15M.2.SL.TZ1.3d: Outline how nerve impulses are transmitted along a nerve fibre.
- 15M.1.HL.TZ2.35: What happens during synaptic transmission? A. K+ enters the postsynaptic membrane.B. A...
- 15N.2.SL.TZ0.7a: Draw a labelled diagram of a motor neuron.
- 15N.2.SL.TZ0.7b: Explain how an impulse passes along the membrane of a neuron.
- 15N.2.HL.TZ0.6b: Explain how an impulse passes along the axon of a neuron.
- 13M.1.HL.TZ1.23: Immediately after an action potential, which event causes the neuron membrane to...
- 13M.2.SL.TZ1.1d: Calculate the difference in median area of synapse between the control mice and mice treated...
- 13M.1.HL.TZ2.23: What initiates an action potential along a neuron? A. Potassium and sodium ions diffuse out...
- 13M.2.SL.TZ1.1a: State the minimum ratio at which some mice showed no symptoms.
- 13M.2.SL.TZ1.1b: Analyse the effect of increasing the ratio of rAChE to OP on the symptoms in mice.
- 13M.2.SL.TZ1.1c: Predict what would happen if a mouse received 300 mg of rAChE and 600 mg of OP.
- 13M.2.SL.TZ1.1e: Describe the evidence for damage to synapses by OP provided by data in the box plot.
- 13M.2.SL.TZ1.1f: Using the data from both graphs, evaluate the hypothesis that plant-produced rAChE could be...
- 13N.1.HL.TZ0.24: The diagram below shows the changes in membrane potential during an action potential. What...
- 13N.2.SL.TZ0.7c: Membranes of pre-synaptic and post-synaptic neurons play an important role in transmission of...
- 13N.1.SL.TZ0.27: The diagram below shows the changes in membrane potential during an action potential. What...
- 13N.1.SL.TZ0.30: The diagram below shows a motor neuron. What are the structures indicated by X, Y and Z?
- 13N.2.HL.TZ0.7c: Membranes of pre-synaptic and post-synaptic neurons play an important role in transmission of...
- 11M.1.HL.TZ1.39: A process occurs in which the inside of a neuron develops a net positive charge compared with...
- 11M.1.SL.TZ2.13: Between which structures do sensory neurons carry nerve impulses? A. From receptors to...
- 12M.1.HL.TZ1.22: What is a characteristic of axons in motor neurons? A. When there is a resting potential,...
- 12M.1.HL.TZ1.23: Which response takes place when blood glucose levels are low? A. Glucagon is released from...
- 12M.1.HL.TZ1.24: During the menstrual cycle, what occurs in response to a fall in the progesterone level? A....
- 09M.1.SL.TZ2.16: Which event directly leads to an action potential? A. Fusion of vesicles with the...
- 09M.1.SL.TZ1.28: On the diagram of the motor neurone shown below, which label identifies a dendrite?
- 10M.1.SL.TZ1.30: In the diagram of synaptic transmission below, what is indicated by the letters X and Y?
- 10M.1.HL.TZ1.24: The diagram below shows the changes in membrane potential during an action potential. What...
- 09N.1.SL.TZ0.28: The graph below shows changes in membrane potential in an axon during the passage of an...
- 11N.1.HL.TZ0.30: Which term describes the phase of rapid entry of sodium ions (Na+) into an axon during an...
- 11N.1.SL.TZ0.25: Between which structures do sensory neurons carry nerve impulses? A. From effectors to the...
- 12N.1.HL.TZ0.20: The diagram shows events at a synapse. What is happening at the point labelled X? A....
- 12N.1.SL.TZ0.7: Which element or ion is required for transmission of a nerve impulse? A. Phosphorous B....
- 12N.2.SL.TZ0.7c: Explain the principles of synaptic transmission.
- 09N.2.HL.TZ0.5c: Explain how nerve impulses are transmitted along and between neurons.
- 17M.1.HL.TZ2.36: If schizophrenia is caused by an overabundance of the neurotransmitters dopamine and...
- 17M.1.HL.TZ2.35: What is essential for conduction of nerve impulses to be saltatory? A. Wrapping of myelin...
