Amino acids that are essential for certain metabolic functions. a. carbohydrates b. proteins c. fats d. all of the above

Charlie is easily winded during soccer practice and wants to improve his cardiorespiratory fitness. which activity would be best for him to choose? lifting weights walking from one class to another running in a 5k race riding a bike at a leisurely pace

Match each of the life stages below to the sentence that best describes it. an answer may be used more than once. young people establish an identity separate from that of their parents and turn to peers for support and acceptance; rejection by peers poses a major threat to adjustment. some common threats to adjustment include children leaving home, physical changes that require one to slow down, and failure to meet earlier goals. gross motor, fine motor, and language skills develop rapidly; changes in family schedule or child-care professional can create anxiety. those who are financially secure and reasonably healthy may enjoy retirement, travel, and socializing; others may find the loss of friends, a job, and financial instability frightening. children who have developed their physical, intellectual, and social skills are able to adjust to new situations, but children who lack basic skills can be threatened by school pressures and conflicts with others. new experiences and responsibilities include beginning college or a job, establishing a home, marrying, and starting a family. separation anxiety can occur when a child enters a new day care facility or school. the child may cry, claim to be sick, or beg to go home. a. early childhood b. middle childhood c. adolescence d. young adulthood e. middle adulthood f. senescence

True or false mucous membranes destroy pathogens on the outer body surface, at body openings.