The Following Steps Refer to Various Stages in Transmission at a Chemical

question 42

Multiple Choice

The following steps refer to various stages in transmission at a chemical synapse. 1. Neurotransmitter binds with receptors associated with the postsynaptic membrane.
2) Calcium ions rush into the neuron's cytoplasm.
3) An action potential depolarizes the membrane of the axon terminal.
4) The ligand-gated ion channels open.
5) The synaptic vesicles release neurotransmitter into the synaptic cleft.
Which sequence of events is correct?

• A) 1 → 2 → 3 → 4 → 5
• B) 2 → 3 → 5 → 4 → 1
• C) 3 → 2 → 5 → 1 → 4
• D) 4 → 3 → 1 → 2 → 5
• E) 5 → 1 → 2 → 4 → 3

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Definitions:

Neonates

Newborn babies, especially within the first month after birth.

Zygotes

The initial cell formed when a sperm cell fertilizes an egg cell, marking the beginning of human development.

Fetuses

The term used to describe a developing human from roughly eight weeks after conception until birth.

Embryos

An embryo refers to the early stages of development in many organisms, following fertilization and during which vital organs and structures begin to form.