If brain death is confirmed, why does an individual's heart continue beating? As long as the heart has oxygen, it can continue to work. The ventilator provides enough oxygen to keep the heart beating for several hours. Without this artificial help, the heart would stop beating.
Answer:
The best answer to your question: Which type of neuroglia would play a role in controlling glutamate levels in the chemical environment, would be: Astrocytes.
Explanation:
From among the neuroglia, or support cells in the brain, whose purpose is to aid neurons in their different functions, astrocytes are not just one of the most numerous, but also one of the most vital for neuronal support. Amongst one of their most central functions is to help in the control of neurotransmitter emition and retention in the synaptic cleft, between two communicating neurons, and therefore, helps regulate the responses from post-synaptic, and pre-synaptic neurons. It is also responsible for clearing up the presence of ions in the extracellular space, and producing ATP, which regulates the amount of neurotransmitters that are released, and taken, by pre-synaptic, and post-synaptic neurons.
In ALS (Amyotrophic Lateral Sclerosis) the issue with glutamate, a neurotransmitter that excites post-synaptic neurons into releasing excess amounts of calcium, is that this hyper-excitatory response leads neurons, particularly motor neurons, to die, and this is what causes ALS. It has been found through research that astrocytes have to do in this process, but it is not clear yet whether there is a failure in their control system, as ALS is still a condition that is very much under study and still without a cure.
Answer:
Polar part : attracts water
nonpolar part :pushes water
Explanation:
phosphatides are surfactants
The answer is the last choice. "a behavioral change and is not related to the internal environment".
I hope this helps.
Answer: Option C.
Explanation:
The female reproductive part consist of endometrium which is the inner epithelial layer with a mucous membrane in the uterus.
Endometrium functions as basic layer during the period of menstruation.
In female reproductive part, an egg is released from ovary around every fourteenth day in a cycle depending on hormonal changes that makes the endometrium layer thick. endometrium lining provides nutrients to an embryo after implantation, when the egg does not get fertilized, the endometrium lining shed during menstruation along with some blood vessels.
Hence, the correct answer is option C.
