CAIE A-Level Biology A2 15.1.4 Sensory Receptor Cells Questions

Explain sensory receptor cells using evidence from each question and mark scheme.

Exam points

Explain sensory receptor cells.

[Maximum number: 3]

The role of sensory receptor cells in mammals is to detect stimuli and generate action potentials in sensory neurones.

Human taste buds on the tongue contain chemoreceptor cells. Different chemoreceptor cells respond to different chemical stimuli.

Fig. 6.1 is a diagram of chemoreceptor cells in a taste bud.

Name the structures in the region Y and describe their function in a chemoreceptor cell.

1 microvilli ;
A brush border I papillae
2 increase surface area ;
3 (so), more ( $\mathrm{Na}^{+}$ ) channels / more $\mathrm{Na}^{+}$ enter ;

All question bank results loaded

CAIE A-Level Biology A2 15.1.4 Sensory Receptor Cells Questions question 1