Answer:
Receptors for neurotransmitters are mostly found on the postsynaptic membrane
Explanation:
One-way synaptic transmission is usually a chemical synapsis, where an electrical impulse is transmitted along the neuron's axon until it reaches the axon terminals, then a depolarization of the presynaptic membrane occurs, leading to the liberation of neurotransmitter molecules from the synaptic vesicles (located in the presynaptic membrane) into the synaptic cleft. Then the neurotransmitter molecules are captured by specific receptors found in the membrane of the postsynaptic neuron, what then leads to a hyperpolarization of the membrane followed by the generation of the postsynaptic potential.
This process can only occur in one direction because the synaptic vesicles are only found in the axon terminals, while the neurotransmitters receptors are only found on dendrites.
Answer:
Central nervous system:
Central nervous system consists of the brain and the spinal cord. Short nerve impulse are present in the central nervous system. The information are obtained from the sensory organs. The damage of nerve fibers are irreparable in the central nervous system.
Peripheral nervous system:
Peripheral nervous system consists of the motor neurons, sensory receptor and sensory neurons. Long nerve impulse are present in the peripheral nervous system. The information are pass out to the effector organs. The damage of nerve fibers are reparable in the peripheral nervous system.
DNA damage systematically causes mutations in the genome and changes genetic information.
The pathways of DNA damage are divided into
Exogenous: due to physical factors (such as UV rays and X and gamma ionizing rays) and chemical factors (desaminants, alkylating agents, oxidizing agents, adducts, nucleotide analogues ...).
Endogenous: they are physiological factors (oxidation desamination, depurination ...).
<u>The consequences of these lesions are:
</u>
* Nucleotide substitution (one or more nucleotides)
* Insertion and deletion of nucleotides (one or more nucleotides): addition or deletion of nucleotides within the genome.
Answer:
It is the only reproductive system that can create life and sustain humanity
Explanation: