Answer:
a contaminant concentration
Explanation:
The concentration of the ingested contaminant determines the toxicity potential of the contaminant. All chemicals are acute toxicants if they are ingested in large amounts. The target organs and mechanism of action of these toxicants may vary but their potential to become toxic depends entirely on their absorption concentration. For example, Ethanol causes CNS depression but may lead to Liver cirrhosis if the concentration in body is very high.
Answer:
a. True
Explanation:
Endothelial cells
These cells are found in all the parts of the circulatory system , these are about a cell thick , and composes a wall known as the edothelium , which lines all the blood vessels , i.e. , the arterioles , veins , capillaries , arteries , venules .
Beneath the endothelial cells , there is a layer of smooth muscle cells .
Answer:
A. Children report more cognitive symptoms than adults, is true regarding panic disorders in children.
Explanation:
A. Children report more cognitive symptoms than adults.
Children with panic disorder are more anxious as compared to adults even when they are not having panic attacks. They report severe cognitive symptoms such as fear of an attack, reluctance to perform well in school, avoiding certain places due to fear of attack called agoraphobia, depression, substance abuse and suicidal behaviors. Hence, children may also need psychotherapy along with panic disorder medications so that they could control their anxiety. Early treatment of panic disorder with cognitive behavioral therapies may prevent complications such as agarophobia, and depression in children.
B. Children experience only cued panic attacks.
Both children and adolescents have unexpected panic attacks which might be triggered by anything which causes anxiety in them. They should have varying periods of fear and discomfort which might last minutes to hours.
C. Children may report a general fear of becoming sick rather than specific physical symptom
A child suffering from panic attacks may have heart-attack like symptoms with a racing heart, fear of death and losing control, obsessive-compulsive symptoms, and physical symptoms including nausea, vomiting, dizziness, shortness of breath etc. Moreover, children are also left with an intense fear of another panic attack which might trigger these symptoms. Thus, they become less functional and has a fear of changing places, habits as anything might trigger their symptoms. So, children are more anxious about the physical symptoms ensuing the panic attack and tries their best to avoid it.
Answer:
The correct option is : a. causing threshold to be reached more quickly
Explanation:
Norepinephrine, also known as noradrenalin, is an organic compound, which belongs to the catecholamine family. It acts as a hormone and a neurotransmitter in the brain and the body and also impacts the heart.
It is one of the hormones secreted by the adrenal medulla. Norepinephrine is a part of the fight-or-flight mechanism of the body. It acts by binding to the β-1 receptors and opens the chemical or ligand gated calcium and sodium ion channels. Therefore, <u>it causes the threshold to be reached faster </u>by increasing the rate of depolarization and thus causes heart arrhythmia.
Therefore, <u>Norepinephrine acts on the heart by </u><u>causing threshold to be reached faster.</u>
Answer:
<u>A. The Fourth Amendment</u>
Explanation:
The Fourth Amendment to the U.S. Constitution protects people's rights to be secure in their "persons, houses, papers, and effects", meaning that the government can not do searches and seizures to people's properties or belongings unless those searches and seizures are deemed reasonable under the law or legal and follow certain conditions. This Amendment was designed to protect people's privacy and to limit the government power so they can not act at the expense of citizen's rights.
