In which part of the human respiratory system does actual oxygen exchange take place?

a.
bronchi

b.
trachea

c.
diaphragm

d.
alveoli

What are the components of an effective weight-training program? a. conditioning, progression, generalization, overwork, balance, and recovery b. overload, progression, specificity, regularity, recovery, balance, and variety c. overwork, coordination, motivation, conditioning, regularity, and variety d. consistency, progression, rest, regression, balance, and specificity

3points which of these are associated with a sedentary lifestyle? select the two correct answers. a. physical fitness b. lack of energy c. normal bmi o d. increased risk of disease

Saved if you often notice flakes of dead skin on your shirt, you may have dandruff. if so,