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IB

Draw the structure of a cell membrane (6 marks).

I would draw a diagram showing the structure of a cell membrane and explain each of the parts:The cell membrane is composed of a phospholipid bilayer which is composed of a hydrophilic head and a hydropho...

PM
Answered by Pravir M. Biology tutor
2125 Views

Describe the cardiac cycle in the human heart

The human heart beats around 60-100 beats per minute. Blood enters the right atrium via the superior vena cava and the inferior vena cava, the blood moves through the tricuspid valve into the right ventri...

SD
Answered by Shane D. Biology tutor
1942 Views

¿Hasta qué punto considera usted que los medios de comunicación afectan a los gobiernos? Comente.

Desde mi punto de vista, el gobierno no está muy afectado por los medios de comunicación, ya que los acciones de los miembros del gobierno ocurren muy menudo clandestinamente. Claro, presión público aplic...

KG
Answered by Kendya G. Spanish tutor
1794 Views

How does an electrical impulse travel from one neuron to the next (IB-SL 6.5)?

  1. The arrival of an action potential at the synaptic knob opens calcium ion channels in the pre-synaptic membrane and Ca++ flow in from the synaptic cleft 2. Ca++ cause vesicles of neurotransmitters t...
AK
Answered by Adam K. Biology tutor
1787 Views

List five (5) risk factors for coronary heart disease, and briefly outline a piece of evidence for each one (5)?

(Chapter: further human physiology)
Factor + explanation (1 point for each) for coronary heart disease (CHD):-Genetics: CHD tends to run in some families-Age: CHD is a disease of old age-Gender: men...

DK
Answered by Dimitrios K. Biology tutor
1669 Views

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