Question

Branched ends of nerve cells are called telodendria, which establish the functional contact with other nerve cells. This connection is called
A. Synangium
B. Synapse
C. Synapsis
D. Synapta

Answer 1

Hint: Here in this question they are asking about nerves.
Here they are talking about the functional contact between the ends of one nerve, which is called telodendria or also called pre synaptic knob and dendrites of the other nerve. From the other name of the telodendria the answer to this question can be easily understood.

Complete solution:
As we all are aware that in the structure of the neuron, which is also called nerve cell – there is the main cell body called cyton and cytoplasmic extensions.
Cytoplasmic extensions are of two types – small multiple extensions called dendrites and longest single cytoplasmic extensions called axon.
Axon ends into nerve endings called telodendrites. Telodendrites are also called pre synaptic knobs.
And dendrons have branches called dendrites.
We know that one neuron / nerve cell never comes in physical contact with the other neuron. So, when one neuron has to pass on its impulse i. e. signal to another neuron, it does so by its functional contact called synapse
1) SYNAPSE is the functional contact between the telodendrites of one neuron with the dendrites / dendrites of another neuron.
There are two types of synapses – chemical synapses – the most common type found in the human body and other is electrical synapses which are rare in our body, but they are much faster than chemical synapses.
2) SYNAPSIS: In meiosis type of cell division, during Zygotene stage of Prophase I which is the second phase of Prophase I, the homologous chromosomes start pairing with each other. This process of pairing of homologous chromosomes is known as synapsis.
3) SYNAPTA: It is a Genus of animal belonging to the
Phylum: Echinodermata
Class: Holothuroidea
Family: Synaptidae.
4) SYNANGIUM: Syngonium which is a genus of plants belonging to the family Araceae.

Hence the correct answer is option ‘B’.
Note: In this question there can arise confusion between Synapse and Synapsis as these terminologies are closely related.
Synapse word means joining together and Synapsis word means conjunction, which are very similar to each other.
But we have to remember that Synapsis refers to meiosis type of cell division which forms the important step for the process of crossing over and genetic recombination whereas Synapse refers to functional contact between neurons for impulse transmission.