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List the attributes of the following heart cell types:
i. Type –one cells (typified by those in the Sino atrial node)
ii. Type-two cells (typified by those in the ventricular endocardium)
iii. Type –three cells (typified by those that comprise the bulk of the heart)
i. Type –one cells (typified by those in the Sino atrial node)
ii. Type-two cells (typified by those in the ventricular endocardium)
iii. Type –three cells (typified by those that comprise the bulk of the heart)
3.2
d) Describe blood flow in a foetus undergoing right to left shunt.
d) Describe blood flow in a foetus undergoing right to left shunt.
3.2 What is a shunt due to? (Answer this with respect to specific examples)
3.2 When does a shunt occur?
3.2 Select the correct regions of the circulatory system from the list below and list them in the
correct order to map the route that blood takes in the circulatory system of: A human foetus right to left shunt.
A. Arterial part of pulmonary system
B. Arterial part of systemic system
C. Capillary beds in lungs
D. Capillary beds in body
E. Left atrium
F. Left ventricle
G. Right atrium
H. Right ventricle
I. Venous part of pulmonary system
J. Venous part of systemic system
correct order to map the route that blood takes in the circulatory system of: A human foetus right to left shunt.
A. Arterial part of pulmonary system
B. Arterial part of systemic system
C. Capillary beds in lungs
D. Capillary beds in body
E. Left atrium
F. Left ventricle
G. Right atrium
H. Right ventricle
I. Venous part of pulmonary system
J. Venous part of systemic system
3.2 Differentiate between tachycardia and bradycardia.
3.2. Name the different types of receptors related to circulatory system, where they are
located, their functions and what stimulates them.
located, their functions and what stimulates them.
3.2 The circulatory system is controlled in the Medulla oblongata through the accelerator
and inhibitory centres. Draw a schematic diagram to show the sequences of events
following low or high blood pressure detected at the baroreceptors.
and inhibitory centres. Draw a schematic diagram to show the sequences of events
following low or high blood pressure detected at the baroreceptors.
3.2) Select the correct regions of the circulatory system from the list below and list them in the
correct order to map the route that blood takes in the circulatory system of a reptile undergoing a complete right to left shunt.
A. Arterial part of pulmonary system
B. Arterial part of systemic system
C. Capillary beds in lungs
D. Capillary beds in body
E. Left atrium
F. Left ventricle
G. Right atrium
H. Right ventricle
I. Venous part of pulmonary system
J. Venous part of systemic system
3.2) Distinguish between:
i) Closed (chambered) and open (peristaltic) circulatory systems
ii) Pulmonary and Systemic circulatory systems
iii) Arterial and Venous blood circulatory systems
