Question 1 0 / 1 pts Edit this Question Delete this Question 0 true_false_questi

Question

Question 1

0 / 1 pts

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0 true_false_question

<span>“Dust cells” possess phagocytic properties.</span>

“Dust cells” possess phagocytic properties.

30197

True

True

exact_answer none 30197

margin of error +/-

4258

False

Question 14

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0 multiple_choice_question

<span>What specifically creates the appropriate surface tension in the alveoli; thus preventing them from collapsing?</span>

What specifically creates the appropriate surface tension in the alveoli; thus preventing them from collapsing?

71489

a) partial pressure of oxygen

a) partial pressure of oxygen

a) partial pressure of oxygen

a) partial pressure of oxygen

exact_answer none 71489

margin of error +/-

32821

b) surfactant

b) surfactant

b) surfactant

b) surfactant

exact_answer none 32821

margin of error +/-

26475

c) cartilage rings

c) cartilage rings

c) cartilage rings

c) cartilage rings

exact_answer none 26475

margin of error +/-

6782

d) serous fluid

d) serous fluid

d) serous fluid

d) serous fluid

exact_answer none 6782

margin of error +/-

65829

e) none of the above

e) none of the above

Question 20

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0 multiple_choice_question

<span>Which of the following muscles is/are commonly used during forced expiration?</span>

Which of the following muscles is/are commonly used during forced expiration?

22152

a) abdominal muscles

a) abdominal muscles

a) abdominal muscles

a) abdominal muscles

exact_answer none 22152

margin of error +/-

76932

b) pectoralis minor

b) pectoralis minor

b) pectoralis minor

b) pectoralis minor

exact_answer none 76932

margin of error +/-

54218

c) scalenes

c) scalenes

c) scalenes

c) scalenes

exact_answer none 54218

margin of error +/-

4957

d) both b and c

d) both b and c

d) both b and c

d) both b and c

exact_answer none 4957

margin of error +/-

33429

e) all of the above

e) all of the above

Explanation / Answer

1) Dust cells are macrophages present in the pulmonary alveoli. They takes up and eliminates the foreign objects introduced into the lung. Therefore, the given statement is true.

14) The surfactant secreted by the type II alveolar cells. Surfactant creates the appropriate surface tension in the alveoli and prevents them from collapsing.

20) The muscles involved in forceful expiration are abdominal wall muscles which include external obliques, internal oblique, transversus abdominis and rectus abdominis. Therefore, the answer for this question is option a (abdominal muscles).

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