A. Contracts, lowers and increases
volume of thorax
A. Diffusion
Q. How does the liver contribute to
homeostasis?
Q. What is homeostasis?
A. Maintaining a constant internal
environment
A. Absorption or release of
glucose; Heat generation
Q. Note one reason why
homeostasis is important in the
human body.
Q. Name the apertures in stems
that are equivalent to stomata.
A. Allows normal metabolic
activities; Keeps temperature
suitable for enzyme reactions
A. Lenticels
Q. Name the process by which the
gases move in or out of the leaf.
Q. What is the function of the
stomata of the leaf?
A. To allow exchange of gases;
Transpiration
Q. Name the structures in plant cells
in which photosynthesis occurs.
A. Diffusion
Q. What is the function of cilia in
the trachea?
A. Their motion carries trapped dirt
A. Chloroplasts
particles and bacteria upwards to
the glottis
Q. Name a gas that leaves the leaf Q. In the spongy mesophyll, gases
at the stoma(ta).
can diffuse throughout the leaf.
Name one such gas.
Page 1 of 4
A. Oxygen; Water vapour; Carbon
dioxide; Nitrogen
Q. How do the nephrons of the
kidneys contribute to homeostasis?
A. Air; Water vapour; O; CO2; N2
Q. Tiny holes called ... allow gases
to enter and leave the leaf.
A. Excretion or reabsorption of
water; Excretion of salts;
Reabsorption of salts
A. Stomata
Q. How do the lungs contribute to
Q. Name a factor that influences the
homeostasis?
diameter of the stoma(ta).
A. Excretion of water or CO2;
Release of heat
A. CO2; Light intensity; Potassium
ions; Water
Q. Give a function of the guard cell.
Q. How are alveoli adapted for their
purpose?
A. Controls stomatal size; Controls
passage of gases
A. Capillary network; Moist
surface; Thin walled; Elastic wall;
Large surface area; One cell thick
Q. Where do cilia occur in the
breathing system?
Q. Name the main gas transported
in the pulmonary vein.
A. Trachea
A. Oxygen
Q. State precisely the events that
take place in the alveoli.
Q. How is oxygen transported in the
blood?
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A. Exchange of gases – CO2 out, O2
in by diffusion
Q. State the function of the
epiglottis.
A. By oxyhaemoglobin
Q. State the function of the larynx.
A. To close off trachea
A. To make sound
Q. Name the process involved in the
passage of gas between the
alveolus and the blood.
Page 3 of 4
Q. Describe the role of the
diaphragm in inhalation.
Follow-me Quiz
Follow-me Quiz
3.4.1 Homeostasis
3.4.2 Necessity for Homeostasis
3.4.3 The Structure of an Exchange System in
Flowering Plants
3.4.4 The Breathing System in the Human
3.4.1 Homeostasis
3.4.2 Necessity for Homeostasis
3.4.3 The Structure of an Exchange System in
Flowering Plants
3.4.4 The Breathing System in the Human
Follow-me Quiz
Follow-me Quiz
3.4.1 Homeostasis
3.4.2 Necessity for Homeostasis
3.4.3 The Structure of an Exchange System in
Flowering Plants
3.4.4 The Breathing System in the Human
3.4.1 Homeostasis
3.4.2 Necessity for Homeostasis
3.4.3 The Structure of an Exchange System in
Flowering Plants
3.4.4 The Breathing System in the Human
Follow-me Quiz
Follow-me Quiz
3.4.1 Homeostasis
3.4.2 Necessity for Homeostasis
3.4.3 The Structure of an Exchange System in
Flowering Plants
3.4.4 The Breathing System in the Human
3.4.1 Homeostasis
3.4.2 Necessity for Homeostasis
3.4.3 The Structure of an Exchange System in
Flowering Plants
3.4.4 The Breathing System in the Human
Follow-me Quiz
Follow-me Quiz
3.4.1 Homeostasis
3.4.2 Necessity for Homeostasis
3.4.3 The Structure of an Exchange System in
Flowering Plants
3.4.4 The Breathing System in the Human
3.4.1 Homeostasis
3.4.2 Necessity for Homeostasis
3.4.3 The Structure of an Exchange System in
Flowering Plants
3.4.4 The Breathing System in the Human
Follow-me Quiz
Follow-me Quiz
3.4.1 Homeostasis
3.4.2 Necessity for Homeostasis
3.4.3 The Structure of an Exchange System in
Flowering Plants
3.4.4 The Breathing System in the Human
3.4.1 Homeostasis
3.4.2 Necessity for Homeostasis
3.4.3 The Structure of an Exchange System in
Flowering Plants
3.4.4 The Breathing System in the Human
Enter Topic Title in each section above
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