Control of blood glucose is very important. Sufficient glucose must be delivered to cells for respiration, but too much glucose can eventually result in coma or even death. The concentration of glucose in the blood is affected by factors such as eating and exercise, and must be brought back to the normal level of about... Continue Reading →
Synapses – Nervous Communication Ep 5
We know that nerve impulses are transmitted along neurones in a wave of depolarisation. But how does a nerve impulse get transmitted from one neurone to the next? Well, that is where synapses come in. Structure of synapses Synapses are the microscopic gaps between neurones. The neurone before the synapse is called the presynaptic neurone,... Continue Reading →
Digestion – Exchange and Transport Ep 13
So far in the exchange and transport series we have mainly been looking at exchange and transport of gases. However, organisms also need to absorb nutrients such as glucose and amino acids so they can carry out processes like respiration and protein synthesis. In this article we will cover how large food molecules are broken... Continue Reading →
The Golgi Apparatus and Lysosomes – Cell Organelles Ep 5
Today we are going to take a look at the Golgi apparatus (sometimes called the Golgi body or Golgi complex) and its role in the cell, followed by the lysosomes. The Golgi apparatus We first came across the Golgi apparatus in the article about the ribosomes and rough endoplasmic reticulum (RER). Protein synthesis begins at... Continue Reading →
