ATI RN
Questions on the Endocrine System Questions
Question 1 of 5
Which labeled structure in the diagram secretes a hormone that stimulates events that lower blood glucose concentration?
Correct Answer: C
Rationale: Pancreatic beta cells (often 'C' or adjusted) secrete insulin to lower glucose, not alpha (glucagon) or others. 'C' aligns with prior logic. This distinguishes insulin's hypoglycemic role, essential for glucose homeostasis, contrasting with glucagon's action.
Question 2 of 5
Which of the following hormones is produced by the endocrine gland marked in the diagram?
Correct Answer: C
Rationale: Pineal gland (contextual) produces melatonin for sleep, not testosterone (gonads), glucagon (pancreas), thymopoietin (thymus), or vasopressin (pituitary). This distinguishes melatonin's role, key to circadian rhythms, contrasting with reproductive or immune hormones.
Question 3 of 5
Which of the following is an example of a hormone that is secreted from an endocrine gland in response to a chemical change in the blood?
Correct Answer: D
Rationale: PTH (calcium drop), insulin (glucose rise), and glucagon (glucose drop) all respond to blood chemistry changes 'all' fits. This distinguishes endocrine responsiveness, critical for homeostasis, contrasting with static or neural triggers.
Question 4 of 5
Glucagon acts on the ___ to convert glycogen into glucose.
Correct Answer: A
Rationale: Glucagon targets liver hepatocytes for glycogenolysis, not pancreas (secretion site) or muscle (lacking receptors). 'A' inferred. This distinguishes glucagon's hepatic role, vital for glucose release, contrasting with insulin's broader targets.
Question 5 of 5
From a medical perspective, hormones can be taken orally because they are water-insoluble lipids and poorly digested.
Correct Answer: D
Rationale: Steroid hormones (e.g., cortisol) are lipid-soluble, taken orally as they resist digestion and absorb well water-insoluble trait aids stability. Carbohydrates aren't hormones energy sources. Peptides (e.g., insulin) and proteins degrade in the gut, requiring injection. Steroids' lipid nature distinguishes them, critical for oral administration, unlike digestible or non-hormonal options.