Answer:
B. Bubonic plagues
Explanation:
Bubonic plague is caused by Yersinia pestis. Rats, prairie dogs and squirrels are the pests that harbour the disease while fleas serve as vector, carrying the Yersinia pestis to humans.
The human victim either touches a dead infected rodent or is bitten by an infected flea. The bacteria invade the skin and are gobbled up by macrophages. They continue to reproduce intercellularly and within lymph nodes especially the inguinal nodes. The nodes swell like eggs and become hot, red and painful. Fever and headache sets in. Hemorrhages under the skin cause a blackish discoloration leading people to call bubonic plague the "Black Death."
Without treatment, death occurs within a few days. Treatment is with antibiotics such as streptomycin, doxycycline.
Anxiety orients us to danger and prepares our bodies to either challenge or escape it. Anxiety can also motivate us to take action, such as when we realize we have an important deadline, and it can give us a bit of a thrill, such as when we ride a roller coaster or play a fast-paced competitive game.
A complete protein contains all nine essential amino acids. The nine amino acids humans cannot synthesize are phenylalanine, valine, threonine, tryptophan, methionine, leucine, isoleucine, lysine, and histidine. A complete protein can provide all of these to a person.
Answer: Manages the safety and effectiveness of your workout
Explanation:
I feel like it wouldn't necessarily be determining your reaction time. Your heart rate doesn't equal how well you're breathing, or at least I'd like to think. Your muscular strength isn't determined by that, at least not directly. That leaves me with B