Question

Exercise and healthy eating are important for keeping your respiratory system healthy.
(1 point)
Responses

true
true

false
false

Answer 1

Cardiovascular disease means diseases of the heart.
(1 point)
Responses

true
true

false

Answer 2

Smoke exhaled from a smoker’s lungs is called mainstream smoke.
(1 point)
Responses

true
true

false

Answer 3

false

Answer 4

true

Answer 5

false