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Chapter 7, Part 5.

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Gaseous Exchange { 5 }

Question 1 of 18

1

To support ___, cells take in oxygen and give out carbon dioxide by a process called ___ .

Select one of the following:

  • aerobic respiration | cellular respiration

  • aerobic respiration | gaseous exchange

  • anaerobic respiration | gaseous exchange

Explanation

Question 2 of 18

1

Gaseous exchange -the exchange of gases between an organism and its environment- takes place by..

Select one of the following:

  • diffusion

  • osmosis

  • facilitated diffusion

  • active transport

  • bulk transport

Explanation

Question 3 of 18

1

Highlight the factors that determine the rate of diffusion in living things.

Select one or more of the following:

  • the amount of oxygen available in the blood stream only

  • the amount of carbon dioxide in the body

  • the size of the surface area available for gaseous exchange

  • the difference in concentration

  • the length of an organism

  • the length of the diffusion path

  • the size of a living thing only

Explanation

Question 4 of 18

1

The shorter the diffusion path, the lower the rate of diffusion -so the respiratory surface must be as thin as possible.

Select one of the following:

  • True
  • False

Explanation

Question 5 of 18

1

Many multicellular animals have very many of their cells too far away from the body surface to receive enough oxygen by diffusion alone.

Select one of the following:

  • True
  • False

Explanation

Question 6 of 18

1

Active organisms have an ___ metabolic rate and so require more___ in their cells; mammals have specialised organs for gaseous exchange.

Select one of the following:

  • increased | oxygen

  • decreased | oxygen

  • increased | carbon dioxide

  • decreased | carbon dioxide

Explanation

Question 7 of 18

1

In mammals the respiratory surface consists of..

Select one of the following:

  • gut

  • capillaries

  • lungs

  • arteries

Explanation

Question 8 of 18

1

Since the lungs are in a protective position inside the ___, air must be brought to the respiratory surface and so the lungs must be ___ .

Select one of the following:

  • chest | freed

  • oesophagus | cushioned

  • trachea | ventilated

  • thorax | ventilated

Explanation

Question 9 of 18

1

A ventilation system is..

Select one of the following:

  • an enzyme-activated mechanism that moves air in and out of the lungs efficiently, maintaining the concentration gradient for diffusion.

  • a pumping mechanism that moves air in and out of the lungs efficiently, maintaining the concentration gradient for diffusion.

  • a pumping mechanism that moves air into the lungs efficiently, maintaining the concentration gradient for diffusion.

  • a pumping mechanism that moves air out of the lungs efficiently and maintains the concentration gradient for facilitated diffusion.

Explanation

Question 10 of 18

1

The lungs are housed in the thorax, an ___ formed by the ___ and its ___ with a domed floor, the ___ .

Select one of the following:

  • airtight | rib-cage | intercostal muscles | diaphragm

  • impervious | rib-cage | intercostal muscles | abdomen

  • upright | rib-cage | muscles | diaphragm

  • airtight | ribs | intercostal muscles | stomach

Explanation

Question 11 of 18

1

The internal surfaces of the thorax are lined by the..

Select one of the following:

  • finger-like projections, villi

  • double membrane

  • epidural membrane

  • pleural membrane

  • nuclear membrane

Explanation

Question 12 of 18

1

This membrane secretes ___ which is a lubricating liquid derived from ___ and protects the lungs from friction during breathing movements.

Select one of the following:

  • serotonin | platelets

  • pleural fluid | blood plasma

  • pleural fluid | platelets

  • oxytocin | platelets

Explanation

Question 13 of 18

1

The ___ work together to prevent food from entering the __ which which connects the lungs to the ___ at the rear of the mouth and runs beside the ___ .

Select one of the following:

  • glottis and epiglottis | trachea | pharynx | oesophagus

  • glottis and cartilaginous flap | trachea | pharynx | oesophagus

  • glottis and epiglottis | oesophagus | pharynx | trachea

  • glottis and epiglottis | pharynx | trachea | oesophagus

Explanation

Question 14 of 18

1

Air is drawn into the alveoli when the air pressure is lower in the lungs than in the atmosphere; it is then forced out when the situation reverses.

Select one of the following:

  • True
  • False

Explanation

Question 15 of 18

1

The volume of the thorax is decreased when the ribs move up and out an the diaphragm dome is lowered.

Select one of the following:

  • True
  • False

Explanation

Question 16 of 18

1

The volume of the thorax is decreased by the diaphragm muscles relaxing and becoming more dome shaped by pressure from below; the ribs now move in and down as the intercostal muscles relax.

Select one of the following:

  • True
  • False

Explanation

Question 17 of 18

1

The lung tissue consists of the alveoli, arranged in clusters and served by a bronchiole. They have ____ and a ___ system wraps around the clusters of them and is connected to the ___ and is drained by a branch of the ___ .

Select one of the following:

  • integral walls | capillary | pulmonary artery | pulmonary vein

  • elastic connective tissue | capillary | pulmonary artery | pulmonary vein

  • elastic connective tissue | capillary | pulmonary vein | pulmonary artery

Explanation

Question 18 of 18

1

Highlight the advantageous features of alveoli.

Select one or more of the following:

  • thick walls -prevent pathogens from crossing into blood stream

  • Large surface area

  • only artery supply to alveoli

  • Thin walls -short diffusion path

  • compact small surface area

  • capillary supply to alveoli

  • surface film of moisture

Explanation