Skin cells are altered by emphysema
The procedure can decrease the odds of having a child with CF by performing an in vitro fertilization procedure and screening the embryo for the CF alleles is referred to as preimplantation genetic diagnosis.
<h3>What diseases can be detected by preimplantation genetic diagnosis?</h3>
Pre-implantation genetic diagnosis (PGD) is the testing of embryos or oocytes at the pre-implantation stage for genetic defects.
It can be used to diagnose cystic fibrosis, Tay-Sachs disease, Hemophilia, etc.
Thus, the procedure can decrease the odds of having a child with CF by performing an in vitro fertilization procedure and screening the embryo for the CF alleles is referred to as preimplantation genetic diagnosis.
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Answer:
The charges inside and outside of the neuron before receiving a stimulus are negative and positive, respectively, which corresponds to the transmembrane rest potential.
Explanation:
Neuron is the specialized cell of the nervous system in charge of transmitting electrical impulses. The generation of a nerve impulse in the form of an electric current is due to a change in the transmembrane potential.
<u>Outside the neuron cell, electrical charges are predominantly positive, and the ion with the highest concentration is sodium. In the intracellular space, a great quantity of proteins provide negative charge, and there is a predominance of potassium ions</u>. Under these conditions, the ionic channels are closed.
For this reason, a neuron at rest, before receiving a stimulus, presents positive charges on the outside and negative charges on the inside, and the membrane potential in this condition is estimated at a value of -65 mV.
Once a stimulus is produced, the ionic channels open and Na+ ions enter the cytoplasm, exchanging them for K+, which implies a change in the membrane potential which, on reaching the threshold, produces an action potential and the nerve impulse is produced.
