Nerve Impulse Sequence

What generates a nerve impulse on the post-synaptic membrane?

• Calcium binding with a receptor site

• Potassium leaking into the post-synaptic membrane

• Neurotransmitter binding with receptor sites

• Neurotransmitter being removed from the synapse

In a simple reflex arc, what is the correct sequence of components?

• Sensory neuron → Interneuron → Motor neuron

• Motor neuron → Sensory neuron → Interneuron

• Interneuron → Motor neuron → Sensory neuron

• Sensory neuron → Motor neuron

What is being identified with the arrows?

• calcium channels

• neurotransmitters

• receptors

• vesicles

What is the advantage of reflex actions?

• They allow for quick responses to stimuli without conscious thought

• They help in complex decision-making processes

• They only occur in animals with advanced nervous systems

• They are under voluntary control

Diagram shows three types of nerve cells,P,Q and R.

Which of the following is the correct sequence of impulses transfer?

• P -> Q -> R

• P -> R -> Q

• R -> P -> Q

• R -> Q -> P

Tags

NGSS.MS-LS1-3

which of the following is not true about the importance of sinapse

• make sure the transmission of impulse is one way

• avoid the back flow of impulse

• make sure the impulses are transmit from dendrite of a neurone to axon terminals of another neurone

Identify the name of the white insulating substance that often covers the axon of a neuron and helps speed up the conduction of the message

• MYELIN

• NEROTRANSMITTER

• SYNAPSE

• VESICLE

What is the first step in the sequence of a nerve impulse?

• Resting potential is established

• Action potential is generated

• Neurotransmitter is released

• Repolarization occurs

Which ion is primarily responsible for the depolarization phase of a nerve impulse?

• Sodium (Na+)

• Potassium (K+)

• Calcium (Ca2+)

• Chloride (Cl-)

During a nerve impulse, what happens immediately after the action potential reaches the axon terminal?

• Neurotransmitters are released into the synaptic cleft

• The axon returns to resting potential

• The impulse is transmitted back to the cell body

• The axon becomes hyperpolarized