Small, electron-lucent vesicles known as synaptic vesicles (SVs) are grouped at presynaptic terminals. They hold neurotransmitters and exocytosis, which is stimulated by calcium, releases them. After exocytosis, SVs are formed locally at the terminals.
- From the presynaptic cell with synaptic vesicles to the postsynaptic cell with neurotransmitter receptors, a signal always moves in one direction across the chemical synapse.
- The correct routing of nerve signals throughout the body is guaranteed by this one-way communication.
- A signal is transmitted from one neuron—the presynaptic, or sending, neuron—to another neuron—the postsynaptic, or receiving, neuron—at the synapse, increasing or decreasing the likelihood that the postsynaptic neuron will fire its own action potential.
- The stimulation causes a sensory neuron to go into an action potential, which alters the motor neuron's potential.
- Excitatory because it tends to depolarize the cell, this potential is known as an excitatory postsynaptic potential (EPSP).
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The answer would be D) 50 g
<u>Answer:</u>
<em>The two major processes by which bacterial populations produce genetic diversity are gene transfer and mutation.</em>
<u>Explanation:</u>
Gene transfer in bacteria occurs through conjugation. In the process of conjugation, the plasmid gets transferred from bacteria to another. Mitosis leads to the formation of two identical individuals.
In this process, the chromosome and the DNA content of the daughter cell remains the same as the mother cell. Bacteria also divides by the process of binary fission.
Answer:
The correct answer would be large NA
The resolution of a microscope is defined as its ability to distinguish two closely placed points as different entities.
The NA or numerical aperture of an objective is defined as the ability of a microscope to gather light.
NA determines the resolving power of the microscope that is, the higher the NA the higher will be the resolving power of the microscope.
However, the total resolution of any microscope also depends upon the NA of the substage condenser.
Answer:
D- Multicellular life
Explanation:
Multicellular organisms are those organisms composed of two or more cells, these species include most fungi, animals and plants. On the other hand, unicellular organisms include bacteria and archaea (i.e., prokaryotes), as well as unicellular eukaryotic species (e.g., protists). Multicellular organisms exhibit a higher organizational level compared to unicellular organisms because in these organisms cells are organized into successive hierarchical levels in order to carry out diverse functions (i.e., tissues, organs, organ systems, etc).
