A-Level Biology OCR B H422

2.2.2: Transport systems in mammals

#2.2.2a

the importance of the closed double circulatory system

To include reference to blood pressure in systemic and pulmonary systems.

#2.2.2b

(i) the structure and functions of arteries, arterioles, capillaries, venules and veins

(ii) transverse sections of arteries, veins and capillaries as observed using a light microscope

Prepared slides or photomicrographs may be examined to show the structural differences between these vessels.

#2.2.2c

the formation and importance of tissue fluid

To include references to HP (hydrostatic pressure) and OP (oncotic pressure or colloidal osmotic pressure).

#2.2.2d

(i) the use of a sphygmomanometer to measure systolic and diastolic blood pressure

To include reference to both manual and electronic measuring.

(ii) comparisons of blood pressure readings

#2.2.2e

the interpretation of systolic and diastolic blood pressure measurements

To include hypertension and hypotension and their possible consequences.

2.2.1
The heart and monitoring heart function
2.2.3
Gas exchange in mammals and plants