ATI RN
Endocrine System Questions Questions
Question 1 of 5
Which of the following hormones are responsible for the 'fight-or-flight' response?
Correct Answer: A
Rationale: Epinephrine and norepinephrine, from the adrenal medulla, drive fight-or-flight, raising heart rate, glucose, and alertness via sympathetic activation. Insulin/glucagon regulate glucose, not acute stress. Estrogen/progesterone manage reproduction, not emergency responses. Thyroxin (metabolism) and melatonin (sleep) lack rapid stress roles. Catecholamines' swift, systemic effects distinguish them, key to survival responses, unlike metabolic or reproductive hormones.
Question 2 of 5
Most endocrine organs are prodded into action by other hormones; this type of stimulus is called:
Correct Answer: A
Rationale: Hormonal stimuli, like TSH stimulating thyroid hormone release, drive most endocrine activity. Humoral stimuli (e.g., blood calcium for PTH) and neural stimuli (e.g., adrenal medulla) exist, but hormonal is predominant. 'Receptor-mediated' isn't a stimulus type. This prevalence distinguishes endocrine regulation, key to hormonal cascades, contrasting with chemical or nerve triggers.
Question 3 of 5
The secretions from which of these glands differs between males and females?
Correct Answer: C
Rationale: Gonadal glands (testes, ovaries) differ: testes secrete testosterone, ovaries estrogens/progesterone, defining sex-specific traits. Adrenal, parathyroid, and pancreas secretions (e.g., cortisol, PTH, insulin) are similar across sexes. Gonadal variation distinguishes it, critical for reproductive endocrinology, contrasting with universal hormones.
Question 4 of 5
What stimulates the release of PTH from the parathyroid gland?
Correct Answer: D
Rationale: Low blood calcium triggers parathyroid hormone (PTH) release to raise levels via bone resorption and kidney action. High calcium inhibits, TSH targets thyroid, calcitonin (thyroid-made) lowers calcium. Low calcium stimulus distinguishes PTH regulation, critical for calcium homeostasis, contrasting with inhibitory or unrelated signals.
Question 5 of 5
Which among the following is an Endocrine gland in the human body?
Correct Answer: C
Rationale: The pituitary gland, an endocrine gland, secretes hormones (e.g., GH, TSH) into the bloodstream, dubbed the 'master gland' for regulating others. Salivary, digestive (e.g., pancreas exocrine), and sweat glands are exocrine, using ducts not blood for secretions. Pituitary's ductless, systemic influence distinguishes it, critical for endocrine coordination, contrasting with exocrine functions.