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What is meant by the term stroke volume?

Stroke volume is the amount of blood, in one contraction, that is pumped from the left ventricle of the heart. The normal range for this is 50-100ml.
LK
Answered by Livia K. • Biology tutor
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When a nerve impulse arrives at a synapse, it causes the release of neurotransmitter from vesicles in the presynaptic knob. Describe how.

Membrane depolarisation arrives at the pre-synpase and causes Ca2+ voltage-gated channels to open. This allows Ca2+ ions to diffuse in the presynapse via the activated Ca2+ channels. Ca2+ influx in the presy...
GM
Answered by Georgios M. • Biology tutor
8233 Views

How to we acquire monoclonal antibodies

Firstly - What are antibodies? Antibodies are part of the immune system which are specific to the pathogen. They help destroy the pathogen.And what are monoclonal antibodies? They're just antibodies that are...
HG
Answered by Helen G. • Biology tutor
2868 Views

How is DNA replicated?

DNA replication starts at an origin - eukaryotic chromosomes have multiple origins whereas prokaryotic chromosomes have only one. Here an enzyme called helicase separates the existing ("parental") ...
SA
Answered by Sarah A. • Biology tutor
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The pancreas is an endocrine and an exocrine gland, indicate both of these functions.

Pancreas' exocrine function is mainly aimed at digesting food. It secrets pancreatic digestive enzymes which travel into the pancreatic duct and are released into the duodenum. Pancreas' endocrine function i...
FK
Answered by Fady K. • Biology tutor
6305 Views