Top answers

A myelinated axon conducts impulses faster than a non-myelinated axon. Explain this difference:

A myelinated neurone is insulated by a layer of Schwann cells that make up the myelin sheath. This aids in the faster conduction of an action potential down the neuronal axon. Depolarisation of the axon can ...
HP
Answered by Hanna P. • Biology tutor
22946 Views

Describe how the guard cells surrounding the leaf pores are adapted to their role

unevenly thickened cell wall able to change shape / bendtransport proteins / ion pumps, in plasma membrane(presence of) chloroplasts (to provide, ATP / energy)
FR
Answered by Faiza R. • Biology tutor
5352 Views

Explain the formation of an action potential in a neuron

Firstly, depolarization of the neuronal membrane occurs. This is due to a stimulus which causes voltage-gated sodium ion channels to open, allowing sodium ions to diffuse down their concentration gradient in...
SM
Answered by Sophie M. • Biology tutor
3775 Views

Describe the ways in which the pancreas acts as both an endocrine and exocrine gland

The Endocrine part of the Pancreas is the Islets of Langerhans which contain alpha and beta cells. These cells secrete hormones directly into the blood. The alpha cells secrete glucagon and the beta cells se...
ES
Answered by Esther S. • Biology tutor
7265 Views

Suggest why an increase in phosphate can be linked to embryonic growth.

Embryonic growth requires cell division and the subsequent synthesis of new tissue. This invariably requires energy and raw materials to progress. Phosphate is an important component of ATP, which acts as a ...
VV
Answered by Vinit V. • Biology tutor
9779 Views