Biology 5090/22 — October/November 2010
Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme
Topics Transport in Humans · Inheritance · Plant Nutrition · Movement Into and Out of Cells · Organisms and Their Environment · Respiration · +9 more
Fig. 1.1 shows a vertical section through a human heart. The valves have not been shown.
Identify structures A and B in Fig. 1.1.
A ______
B ______
Complete Fig. 1.1 by drawing the valves to show how they control the direction of blood flow through the heart.
On Fig. 1.1, draw arrows to show the direction of blood flow into, through and out of the heart.
Some people have a condition known as ‘a hole in the heart’. This allows a connection between the left and right atrium at point X in Fig. 1.1.
Suggest two problems this might cause.
- ______
- ______
The rest of this paper
8 more questions- Q2Organisms and Their Environment · Inheritance · Plant Nutrition10M
- Q3Plant Nutrition · Respiration · Enzymes · Human Nutrition10M
- Q4Sexual Reproduction in Plants · Movement Into and Out of Cells · Cell Division and Reproduction · Inheritance11M
- Q5Human Gas Exchange9M
- Q6Coordination and Control10M
- Q7Cell Structure and Organisation · Biotechnology and Genetic Modification10M
- Q8(option-1)Movement Into and Out of Cells10M
- Q8(option-2)Sexual Reproduction in Humans · Transport in Humans10M