Terminal transferase (TdT) Adds homopolymer tails to the 3’end of DNA.

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#Unit 7. System Physiology – Animal

Excitatory postsynaptic potential (EPSP)

During this potential, excitatory transmitter opens Na+ or Ca2+ channels in the postsynaptic membrane, producing an inward current & the excitability of the neuron to other stimuli is increased

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#Unit 7. System Physiology – Animal

During Inhibitory postsynaptic potential (IPSP) the excitability of the neuron to other stimuli is decreased

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#Unit 7. System Physiology – Animal

Postsynaptic inhibition occurs when an inhibitory transmitter (eg, glycine, GABA) is released from a presynaptic nerve terminal onto the postsynaptic neuron.

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#Unit 7. System Physiology – Animal

The synapse between a motoneuron and a muscle fiber is called the neuromuscular junction

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#Unit 7. System Physiology – Animal

Action potentials are propagated down the motoneuron, depolarize each adjacent region to threshold. Finally, the presynaptic terminal is depolarized, and this depolarization causes voltage-gated Ca2+ channels in the presynaptic membrane to open.

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#Unit 7. System Physiology – Animal