Breathing is controlled by _____.

(a)

cerebrum

(b)

medulla oblongata

(c)

cerebellum

(d)

pons

The respiratory structures of insects are _____.

(a)

tracheal tubes

(b)

gills

(c)

green glands

(d)

lungs

The Oxygen Dissociation Curve is ______.

(a)

sigmoid

(b)

straight line

(c)

curved

(d)

rectangular hyperbola

During inspiration, the diaphragm _____.

(a)

expands

(b)

unchanged

(c)

relaxes to become domed-shaped

(d)

contracts and flattens

CO₂ is transported through blood to lungs as _____.

(a)

carbonic acid

(b)

oxyhaemoglobin

(c)

carbamino haemoglobin

(d)

carboxy haemoglobin

Vital capacity is _____.

(a)

TV + IRV

(b)

TV + ERV

(c)

RV + ERV

(d)

TV + TRV + ERV

Name the respiratory organs of flatworm, earthworm, fish, prawn, cockroach and cat.

Air moving from the nose to the trachea passes through a number of structures. List in order of the structures.

Which structure seals the larynx when we swallow?

Resistance in the airways is typically low. Why? Give two reasons.

How the body make longterm adjustments when living in high altitude.

Why is pneumonia considered a dangerous disease?

Diffusion of gases occurs in the alveolar region only and not in any other part of the respiratory system. Discuss

Explain the conditions which creates problems in oxygen transport.