Answer:
vaccine
Explanation:
British physician and biologist Edward Jenner was born in Berkeley, County Gloucestershire on May 17, 1749. He was the fourth son of Reverend Jenner, vicar of Berkeley.
At that time, smallpox was a very feared infectious plague that whipped Europe and America fundamentally, and for which there was no treatment or way to prevent it. It was caused by the Variola virus, although at that time it was not known.
Jenner observed that cows suffered from a disease called Vaccina or cowpox, which causes rashes in udders similar to those produced by human smallpox.
“He tested his vaccine with an 8 year old boy”
Sometimes they spread the disease to the milkmaids, in which pustules appeared on the hands. Fortunately, it was a benign condition and those affected soon recovered with very few sequelae.
But what really caught Jenner's attention was that these people became immune against human smallpox.
T/F
Answer:
True
Explanation:
Muscle stiffness is multifaceted and can result from factors such as overworked muscles, cellular damage after intense exercise, improper alignment of joints, lack of warm-up before exercises, and myosin heads not detaching from action-binding sites. Muscles gain mass as the damage is repaired, a process called hypertrophy. This contrasts with the atrophy process where sarcomeres and myofibrils disappear but the number of muscle fibers remains.
Stiff muscles do not only result from overworking them but can be due to various factors. Improper resistance training, for instance, can lead to overused muscles, tendons, or bones resulting from too heavy loads or insufficient recovery time between workouts. Other causes include cellular damage to muscle fibers after intense exercise and joints not properly aligned. Besides, the condition of muscles being rarely completely relaxed or flaccid also contributes to muscle stiffness.
However, it's worth noting that muscles gain mass as the muscle damage is repaired, and additional structural proteins are added to replace the damaged ones. This is referred to as hypertrophy. The opposite process - atrophy, results in the disappearance of sarcomeres and myofibrils but not the number of muscle fibers, which can be observed when a limb casts are removed or in diseases like polio.
Everyday activities, such as exercise and stretching, matter too. Warm-up exercises increase blood flow to the muscles while stretching helps pull on the muscle fibers. Absence of a proper warm-up can result in damage to muscle fibers or a pulled tendon. Lastly, myosin heads not detaching from actin-binding sites results in muscle stiffness, causing conditions like 'writer's cramp' or rigor mortis in a recently deceased person.
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overload
recovery
transfer
Patrick remembers his skill as he has learned this when he was a member of wrestling team. The training principle represented here is Transfer.
In the context of physical training, the term "transfer" refers to the use of skills and information that have been acquired in one activity in another. This is especially useful in athletics because success in a variety of sports and activities requires a wide skill set.
In this instance, Patrick is employing the techniques he developed as a member of his school's wrestling team to prepare by jumping rope for his impending boxing battle. He improved his boxing prowess by transferring his talents from one sport to another.
This situation illustrates the training principle of Transfer. Hence, the answer is option D i.e. transfer.
Learn more about transfer here:
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