You may assume that the postsynaptic cell is the only location for receptors for neurotransmitters released the presynaptic cell(s). Receptor blockers are reversible and competitive, that is, at high concentrations of neurotransmitter, the neurotransmitter can activate the receptor even in the presence of the receptor blocker=receptor inhibitor=receptor antagonist.
Nerve Sea releases an activating neurotransmitter, NTsea, onto Nerve Tee.
Nerve Tee releases an activating neurotransmitter, NTTee, onto Nerve U.
Nerve Pee releases an inhibiting neurotransmitter, InPee onto Nerve U.
Nerve U releases an activating neurotransmitter, NTU onto Effector Cell Vee.
When activated Effector Cell Vee releases Vstuff.
Be sure to consider what happens when
- both Nerve Sea and Nerve Pee are inactive
- Nerve Sea is active and Nerve Pee is inactive
- Nerve Pee is inactive and Nerve Pee is active
- both Nerve Sea and Nerve Pee are active
1. Poison1 prevents the release of NTSea from nerve S.
Poison2 activates the release of InPee from Pee cells.
- Compare the effects of two poisons given separately.
- Then describe what happens if both are given.
Be sure to walk me through all the steps.