Answer: Refractory period of the cardiac action potential
Explanation:
Unlike the skeletal muscle which can be reactivated before it reaches a contraction, cardiac muscle must wait before it is almost completely relaxed to be activated again (because of its long refractory period), so one cannot make an increase in strength of contraction with a high frequency of stimulations.
The answer would be "B. cocaine". Cocaine is an illegal stimulant unlike the other options listed above.
Answer
1. <u>Etiquette determines which behaviors are polite and impolite among players and team.</u> It is a code of polite conduct according to social norms and efficiency. Etiquette as a societal rule is formed to enhance positive human relation when interacting and can reduce conflicts in the society. A person who is aware of the etiquette in a given situation will be more confident, comfortable and competent thus making even those around him or her at ease.
2. <u>An example of good etiquette while running is running with no more than two people side by side</u>. This can prevent any changes of falling in the race due to collision with others who are in the same lane. Large groups cannot assure safety in a race though running as a group could boost group morale to complete a race especially in a marathon. Playing music at through headphones is risky during a race because one will be unaware of the sounds around him/her.
3. <u>An example of poor sportsmanship is shouting phrases of discouragement to the opposing team</u>. When two sides agree to participate in a game, they set rules of that game to be followed. When an individual violates rules of a game to attain self advantage against the other, it is considered unfair and termed as poor sportsmanship. Cheating in a game, using abusive words and misbehaving in any manner are all examples of poor sportsmanship.
4. <u>An example of a broken safety rule is going to the gym while you are sick.</u> People exercise at the gym to improve their health .It is important to prevent accidents that may shutdown a workout session. Some of the safety tips for a healthy workout are getting a regular health check-up, using good training techniques and using a personal trainer to give you gym advise.
5. <u>Wiping down machinery after use is proper etiquette under all circumstances</u>. The process is recommended for hygiene and cleanness of the area. A notice can be place to indicate that a person should do the whipping down after finishing his or her exercises though it is appreciated by most individuals if the same could be done even with no notice/rule posted.
6. <u>An example of a safety rule is runners alerts others with, ‘on your left/right’ while passing</u>. When safety rules are properly followed, they keep individuals safe. In this example, the alert could help runners know where to go preventing cases of missed route or even ending in places that are slippery where runner could fall and acquire injuries.
7. <u>Rules of sportsmanship during a game or match include respecting the referees and officials</u>. When in a game, players should respect one another and the other stakeholder of the game such viewers, referees, officials and all those that are involved in the game. Respect can further be extended to the rules set to govern the game, where players should stick to the guidelines of the games and avoid rising issues in the field which will show poor conduct and lack of good sportsmanship.
Traditional dental fillings are usually made of silver amalgam, but can also be other materials like cast gold. The strengths of a traditional filling include: Strength and durability. Useful for back teeth that are used more forcefully. Less expensive than composite alternatives.
Answer:
Industrialisation usually requires the use of potentially polluting technologies which can generate waste products that can pollute the air, water and soil.
It is entirely up to both governments and the individuals undertaking the industrialisation to ensure that pollution is kept to an absolute minimum, preferably non-existent. However, this can sometimes add to the cost of the products produced so is often overlooked or ignored by both government, who want greater tax revenue, and the individuals, who want a higher profit, at the expense of the environment - often until it is too late to prevent severe damage.
