Receptors (A-level only) (3.6.1.2) | AQA A-Level Biology - (7402) | KnowledgeSet

Receptors (A-level only)

Biology · A-Level · AQA · AQA A-Level Biology - (7402) · Specification point · 3.6.1.2 · Organisms respond to changes in their internal and external environments (A-level only) · Stimuli, both internal and external, are detected and lead to a response (A-level only)

Pacinian corpuscle

Rod and cone photoreceptor comparison

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3.6.1.2 Receptors (A-level only)

Content	Opportunities for skills development
$The Pacinian corpuscle should be used as an example of a receptor to illustrate that: receptors respond only to specific stimuli stimulation of a receptor leads to the establishment of a generator potential. The basic structure of a Pacinian corpuscle. Deformation of stretch-mediated sodium ion channels in a Pacinian corpuscle leads to the establishment of a generator potential. The human retina in sufficient detail to show how differences in sensitivity to light, sensitivity to colour and visual acuity are explained by differences in the optical pigments of rods and cones and the connections rods and cones make in the optic nerve.$	$AT h Students could design and carry out investigations into: the sensitivity of temperature receptors in human skin habituation of touch receptors in human skin resolution of touch receptors in human skin.$

Content

Opportunities for skills development

The Pacinian corpuscle should be used as an example of a receptor to illustrate that: receptors respond only to specific stimuli stimulation of a receptor leads to the establishment of a generator potential. The basic structure of a Pacinian corpuscle. Deformation of stretch-mediated sodium ion channels in a Pacinian corpuscle leads to the establishment of a generator potential. The human retina in sufficient detail to show how differences in sensitivity to light, sensitivity to colour and visual acuity are explained by differences in the optical pigments of rods and cones and the connections rods and cones make in the optic nerve.

AT h Students could design and carry out investigations into: the sensitivity of temperature receptors in human skin habituation of touch receptors in human skin resolution of touch receptors in human skin.