Page 74 - SUBSEC October 2017_Neat

UNIT 2
MODULE 2: BIOSYSTEMS MAINTENANCE

GENERAL OBJECTIVES

On completion of this Module, students should:

1. understand the mechanisms by which plants absorb minerals and water and the impact of
environmental factors on these mechanisms;

2. understand translocation in relation to structure of the phloem;

3. understand the organisation, structure, transport function and internal control mechanisms
of the mammalian circulatory system;

4. understand and apply the concept of homeostasis and hormonal action using named
examples;

5. understand the role of the kidneys as excretory and regulatory organs and their impact in
common disorders; and,

6. understand the role of the nervous system in systems maintenance.

SPECIFIC OBJECTIVES EXPLANATORY NOTES SUGGESTED PRACTICAL
ACTIVITIES

1. The Uptake and Transport of Water and Minerals

Students should be able to:

1.1. explain the uptake of ions Emphasis on the role of
by active transport in roots; the endodermis.

1.2. describe the entry of water
into plant roots in terms of
water potential;

1.3. relate the structure of xylem Inclusion of transport and Make diagrams from
vessels to their function; support roles. prepared slides of xylem
vessels.

1.4. explain the ascent of water Root pressure, capillarity, Wet mounts of celery
in plants; and, cohesion, adhesion and placed in coloured fluid
transpiration pull. Include could be observed. Use
the role of stomata in Coleus epidermal peels to
transpiration. visualise stomata.

1.5. discuss the impact of Light and air movements. Design and/or investigate
environmental factors on Root pressure, capillarity, the effects of
the rate of transpiration. cohesion, adhesion. environmental factors on
the rate of transpiration.

CXC A10/U2/17
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