Pancreatic islets — cell types?
β-cells produce insulin; α-cells produce glucagon.
Islets of Langerhans
Small pancreatic clusters secreting hormones
Proinsulin — domains?
α-chain, β-chain, C-peptide.
Insulin primary producer
Produced by β-cells
Glucagon producer
Produced by α-cells
Proinsulin parts
β-chain, α-chain, C-peptide
Insulin release pattern
Biphasic: quick and sustained
Insulin actions
Lowers blood glucose and promotes storage
Blood glucose regulation
Insulin decreases, glucagon increases blood sugar
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1. Which pancreatic islet cell type produces and secretes insulin?
2. What are the small pancreatic cell clusters called that perform endocrine hormone secretion?
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