Arrange the following terms to describe the sequence of even

Arrange the following terms to describe the sequence of events that happens after a neurotransmitter binds to a receptor on a postsynaptic neuron. Phrases may be used more than once. action potential fires at axon hillock axon hillock reaches threshold cell depolarizes exocytosis graded potential occurs receptor-regulated ion channel opens local current flow saltatory conduction voltage-regulated Ca^2+ channels open voltage-regulated K^+ channels open k. voltage-regulated Na^+ open Arrange these events in the proper sequence: _____ Efferent neuron reaches threshold and fires an action potential. _____ Afferent neuron reaches threshold and fires an action potential. _____ Effector organ responds by performing output. _____ Integrating center reaches decision about response. _____ Sensory organ detects change in the environment. Indicate which neurons are being described, using the answer code just below. (A description may apply to more than one class of neurons). afferent neurons efferent neurons interneurons (association neurons) have receptors on peripheral branches in the skin, muscles, joints or internal organs _____ lie entirely within the CNS _____ lie primarily with the peripheral nervous system _____ innervate (form synapses with) muscles and glands _____ cell body is devoid of presynaptic inputs _____ responsible for thoughts, emotions, memory, etc. When acetylcholine binds to nicotinic receptors, the cell\'s response is mediated by G proteins. the response is excitatory or inhibitory. Na^+ channels open, All of the above are appropriate. Which of these structures is innervated almost exclusively by the sympathetic division? gastrointestinal tract heart urinary bladder reproductive tract blood vessels

Solution

Answer:

2. Sugnal trunsduction is local current flow (g), which basically the flow of the electrochemical signal through the nerve fiber and synapses holds the crucial backbone of our sense. The process includes an impulse generation, which propagates as saltetary conduction (h) . This involves cell depolarisation (c). Similtaneously receptor mediated ion channels opens (f). It consists opening of ca+, k+ and na+ (i,j,k). As a result graded potential occurs (e). Axon hillock reaches its threshold and fires. The firing waves to synapse and exocytosis occurs.

3. Sensory organ dtects the changes......afferent neurons transmits the signal and fires the action potential.....integrating system reaches the decision... Efferent neurons fires to generate action potential wave.....effector organ responds to the stimuli. This is how the neural system works.

4. AffereNt neurons are having perIipheral receptors....efferent neurons are present in there gut...afferent neurons lie near skin..internurons innervate muscles and other glands.....Interneuron\'s are devoid of presynaptic inputs....efferent neurons are responsible for memory and emotional centers of human being.

5. All the opptions are corrEct..

6. Blood vessel are innrvated almolst excluSsivsely by sympathetic division.