Answer;
Vesicles containing neurotransmitter.
Explanation;
-Neurotransmitters are released by secretion from the ends of axonal terminals.
-Synaptic vesicles store various neurotransmitters that are released at the synapse.
-Neurotransmitters are released from the axon terminal when their vesicles "fuse" with the membrane of the axon terminal, spilling the neurotransmitter into the synaptic cleft.
Answer:
Answer is 3%.
Explanation:
Major depression as explained in the text is a type of depression that last for a longer period of time.
This type of depression is usually seen in the adults , especially in the people within 40-59 age bracket.
This is because, at that age bracket or range , people have the notion to have gathered a reasonable amount of notable achievements in life, ranging from being married with children , to having personal house, cars, business, and many others. And when some or none have been achieved, it brings depression.
Teenagers do not think about the things mentioned above , because they have parents that will provide them, and, because they haven't reach the stage.
Some of the symptoms of depression in adults are
* feeling hopeless or empty
* feeling sad
* change in appetite.
* feeling helpless and restless.
* trouble with concentration.
Nondisjunction
DNA replication duplicates every strand of DNA so that there
are two copies of every chromosome. These (attached) copies, called sister chromatids,
undergo two rounds of chromosomal divisions ( Meiosis I and II). A total of
four haploid cells are now present. Homologous chromosomes or sister chromatids
are pulled apart in a process called disjunction. However, chromosomes may at
times fail to separate properly. This is called nondisjunction.