Local anesthetics inhibit nerve conduction in a reversible manner without altering the nerve. The inhibition appears rapidly and for a longer or shorter duration depending on the products and the concentrations used. The extent of the territory rendered insensitive to pain depends on the modes of administration of the local anesthetic, either at the level of the nerve endings, or at the level of a nervous trunk, for example.
They act at the level of the neuronal membrane by interfering with the process of excitation and conduction. The anesthetic crosses the axon membrane, rich in lipids, in the form of base before taking up a cationic form on the internal face of the neuron where the pH is more acidic.
At this level, there is a blockage of nerve conduction by decreasing the membrane permeability to sodium ions that occurs during the depolarization phase. As the progression of the anesthetic action along the nerve increases, the threshold of excitability increases and the conduction time increases. This is completely blocked from a certain concentration of local anesthetic.
The nerve fibers are unequally sensitive to the action of local anesthetics: they disappear in order: the painful, thermal, tactile sensations.
Answer:
a. Atenolol is a beta-blocker, while Hydrochlorothiazide is a diuretic.
b. Atenolol and Hydrochlorothiazide can be used together to decrease the blood pressure and to slow the heart rate down.
c. The patient needs to have into consideration that both medications may cause irregular heartbeats, dizziness, weakness and fainting.
Explanation:
Atenolol is a beta-blocker, it means that this drug slows down the heart rate by changing how the body responds to nerve impulses, which enhances the pumping of blood. Moreover, Hydrochlorothiazide is a diuretic or 'water pills' drug that can be used to treat edema conditions (i.e., excess fluid in tissues), thereby enhancing blood pressure that can damage the heart. It has been shown that the combination of both drugs may decrease the blood pressure and the incidence of hypertension.
Answer:
A “de jure” census tallies people according to their regular or legal residence, whereas a “de facto” census allocates them to the place where enumerated—normally where they spend the night of the day enumerated
Explanation:
Answer:
Scalds can be accidental or not, but many can be prevented. They’re often caused by minor accidents when you are in a hurry or under pressure. For example: You can scald yourself by spilling a hot beverage or soup on your skin.
Steam from the oven or microwave can also burn you if you are too close.
Tap water burns are more likely if your water heater is set above 120°F.
Scald burns are especially common in the restaurant industry. In a restaurant kitchen, water temperature has to be kept high to prevent bacterial overgrowth and to properly clean cookware.
Explanation:
Hope this helps! :)
