Answer:
Botulinum Toxin
Explanation:
Botulinum Toxin is a neurotoxin (meaning that its target is the nervous system) produced by a bacteria known as Clostridium Botulinum. The Botulinum Toxin inhibits the transmission of acetylcholine (principal neurotransmitter that participates in muscle contraction). The acetylcholine travels from presynaptic motor neurons (the neurons that control the movement) to the muscle at the neuromuscular junction (the place where the nerve gets in contact with the muscle) interfering with neural transmission and inhibiting the stimulation of the muscle fiber, thus causing muscle paralysis.
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.
Nursing students are prone to stress due to the transitional nature of college life. High levels of stress are believed to affect student's health and academic functions.
Answer:
The correct answer is - exogenous stain.
Explanation:
Exogenous stains are the intrinsic stains that affect teeth from inside as stain formed inside due to the external sources. In this type of stain, it formed after a tooth has erupted. These stains can occur when the very inner part known as dentin is turned dark or yellowish.
These stains can not be polished and removed. These can occur if an individual has plaque or calculus in the tooth.
Thus, the correct answer is - exogenous stain.
25.4 hope this helped!!!!!