Respiration in Humans (Biology) End of Lesson Check

C₆H₁₂O₆ + 6 O₂ --> 6 CO₂ + 6 H₂O

is the equation for

• aerobic respiration

• anaerobic respiration in yeast

• anaerobic respiration in humans

• breathing

Which is a product of anaerobic respiration in humans?

• carbon dioxide

• water

• lactic acid

• ethanol

What are the products from anaerobic respiration in yeast?

• carbon dioxide

• water

• lactic acid

• ethanol

______ ____ is incurred when muscles are unable to meet the demands of vigorous exercise.

During inspiration, the diaphragm

• contracts

• relaxes

• flattens

• arches up

During inspiration, the intercostal muscles

• Internal - relax

• External - relax

• Internal - contract

• External - contract

What are the 4 ways in which the lung is adapted for efficient gas exchange?

Answer explanation

1. Numerous alveoli - provides large surface area

alveolus is one-cell thick - reduces the diffusion distance of gases

thin film of moisture - for oxygen to dissolve in it

many capillaries - flow of blood maintains concentration gradient

How does inspired air differ from expired air?

Answer explanation

Inspired air has higher oxygen content than expired air

Inspired air has lower carbon dioxide content than expired air

Expired air has higher water content than inspired air.

Expired air is warmer than inspired air.

What are the effects of tar on human health?

• addictive

• paralyses cilia

• causes uncontrolled cell growth

• blood clots quickly

Persistent and violent coughing due to bronchitis can may lead to _________, where the partition walls of alveoli breaking down.