In adrenocortical insufficiency, such as Addison's disease, the most severe manifestations are the result of an insufficient amount of circulating cortisol.
Addison’s disease is an uncommon chronic condition in which the adrenal glands fail to produce sufficient amount of hormones including cortisol and aldosterone. It results often from an autoimmune attack.
Cortisol is a hormone which assists the body in dealing with stress such as the stress of an illness, injury or surgery. It also helps in regulating the blood pressure, cardiac function, immune system and blood glucose or sugar levels.
Aldosterone is a hormone which affects the balance of salts like sodium and potassium in the blood which in turn controls the amount of fluid that the kidneys can remove as urine.
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B is correct. Here's why:
A states that horses were once carnivores. Large, grinding teeth isn't used by meat eaters; those would be sharp, serrated teeth. This is incorrect.
C talks about migration from S.A. to N.A., and nowhere in the statements above does it mention South America, so that's incorrect as well (unless you know something I don't)
D states that horses share a common ancestor with all mammals. I don't believe the mesohippus was the ancestor of any dolphin species.
Hope this helps!
Too much of one organism can cause an imbalance in the habitat because of its niche occupation
Induced depression of single neurons in brain areas with opiate receptors
- Enkephalin, applied microiontophoretically, depressed spontaneous and glutamate-induced firing of one neuron in frontal cortex, caudate nucleus, and periaqueductal gray matter, where enkephalin and high concentrations of opiate receptors are met.
- More than one depressions were blocked by the specific narcotic antagonist naloxone. The results are durable with a neurotransmitter or neuromodulator role for this new brain pentapeptide.
- Opium derivatives have been in medical use for the last 2000 years, and may be longer than any other class of drugs
- . The brain regions which was involved in these actions have been identified in some instances by local microinjection of pmole quantities of opioids.
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