1. Extracellular calcium enters the axon terminal, triggering the exocytosis of acetylcholine. 2. Acetylcholine is removed by acetylcholinesterase. 3. Acetylcholine binds to receptors and depolarizes the postsynaptic membrane. 4. Axon terminal depolarizes.

Question: Which of the following is the correct order of events that occur at a cholinergic synapse?

The correct order of events that occurs in the cholinergic synapse is 4,1,3,2

Explanation:

cholinergic synapse are distributed all over the body and they aid in transmitting electrical signals from one cell to another. Acetylcholine is used as the neurotransmitter. This can be from a muscle cell to a nerve cell or from nerve cell to nerve cell. The series of events that takes place at this synapse includes the following steps:

- Axon terminal depolarizes.

- Extracellular calcium enters the axon terminal, triggering the exocytosis of acetylcholine

- Acetylcholine binds to receptors and depolarizes the postsynaptic membrane

- Acetylcholine is removed by acetylcholinesterase.

the dark variety, as they are not visible on the dark tree barks

explanation:

an individual’s sex (i.e., whether they are a male or female) is determined by the sex chromosomes. most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. typically, females have two x chromosomes (xx) and males have one x chromosome and one y chromosome (xy). conditions caused by changes (“mutations”) in genes located on the x chromosome are considered x-linked.

x-linked recessive inheritance

most x-linked conditions are recessive. this means that in a person with two x chromosomes (most females), both copies of a gene (i.e., one on each x chromosome) must have a change or mutation whereas in a person with one x chromosome (most males), only one copy of a gene must have a mutation. a female with a mutation in one copy of a gene on the x chromosome is said to be a “carrier” for an x-linked condition. a male with a mutation in a gene on the x chromosome is typically affected with the condition. because females have two copies of the x chromosome and males have only one x chromosome, x-linked recessive diseases are more common among males than females. however, x-linked recessive diseases can occur in both males and females.

for x-linked recessive disorders, an unaffected carrier mother who has a mutation in a gene on the x chromosome can transmit either the x chromosome with this mutation or a “normal” x chromosome to her children. if the father is unaffected, none of her daughters will be affected and all of her daughters will be unaffected—since they will inherit at least one normal x chromosome from their father. however, each daughter will have a 50% chance of being an unaffected carrier like her mother and a 50% chance of both x chromosomes being normal.