Beta cells (β-cells) are a type of specialised cell found in the Islets of Langerhans within the pancreas. These cells play a central role in regulating blood sugar (glucose) levels by producing and secreting the hormone insulin.

Unit 1,

Reference: Oxford Concise Medical Dictionary (9th ed) Oxford University Press 2015 ISBN-13: 9780199687817, p1046 

Blood glucose, also known as blood sugar, refers to the concentration of glucose (a type of sugar) present in the blood. Glucose is a vital source of energy for the body's cells, and its levels are tightly regulated to ensure proper functioning of various physiological processes.

Unit 1,

Reference: Oxford Concise Medical Dictionary (9th ed) Oxford University Press 2015  ISBN-13: 9780199687817, p1070 

Blood glucose monitoring helps to identify patterns in the fluctuation of blood glucose (sugar) levels that occur in response to diet, exercise, medications, and pathological processes associated with blood glucose fluctuations, such as diabetes mellitus. Unusually high or low blood glucose levels can potentially lead to life-threatening conditions, both acute and chronic. Blood glucose level (BGL) or blood sugar level (BSL) monitoring conducted outside of clinical facilities, such as the home, are often referred to as capillary blood glucose (CBG) tests. In contrast, blood glucose tests performed at clinical facilities may include CBG and plasma glucose venous blood tests.

Unit 4,

Reference: Mathew TK, Zubair M, Tadi P. Blood Glucose Monitoring. [Updated 2023 Apr 23]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK555976/

A large dose of a drug administered by rapid injection, as opposed to infusion.

Unit 4,

Reference: Oxford Concise Colour Medical Dictionary (7th Edition, Kindle Edition) Oxford University Press 2020 ISBN-13: 978-0198836629, p1073