ATI RN
Multiple Choice Questions on Endocrine System Questions
Question 1 of 5
What is the mass of hydrogen chloride that reacts with 5.1 g of ammonia?
Correct Answer: B
Rationale: To find the mass of hydrogen chloride that reacts with 5.1g of ammonia, we need to use the stoichiometry of the balanced chemical equation. The balanced equation for the reaction between ammonia (NH3) and hydrogen chloride (HCl) is: NH3 + HCl → NH4Cl From the equation, we can see that 1 mole of NH3 reacts with 1 mole of HCl to form 1 mole of NH4Cl. Therefore, the molar ratio of NH3 to HCl is 1:1. First, we need to convert the given mass of ammonia (5.1g) to moles using the molar mass of ammonia (17g/mol): 5.1g NH3 * (1 mol NH3 / 17g NH3) = 0.3 mol NH3 Since the molar ratio of NH3 to HCl is 1:1, the moles of HCl that react with
Question 2 of 5
The secretion of parathyroid hormone is a good example of __________.
Correct Answer: B
Rationale: The correct answer is B: humoral stimuli. Parathyroid hormone secretion is regulated by the concentration of calcium in the blood, which is an example of humoral stimuli. When blood calcium levels decrease, parathyroid hormone is released to increase calcium levels. Pituitary gland stimuli (A), neural stimuli (C), and hormonal stimuli (D) are not directly involved in the regulation of parathyroid hormone secretion.
Question 3 of 5
The normal endocrine controls can be directly overridden by the __________ system.
Correct Answer: A
Rationale: The correct answer is A: nervous system. The nervous system can directly override normal endocrine controls through the release of neurotransmitters that can stimulate or inhibit hormone release from endocrine glands. The nervous system can rapidly respond to immediate changes in the internal or external environment, allowing for quick adjustments in hormone levels. Summary of why the other choices are incorrect: B: The circulatory system is not involved in directly overriding endocrine controls. C: The digestive system primarily regulates the breakdown and absorption of nutrients, not endocrine controls. D: The reproductive system is responsible for the production of sex hormones and gametes, but it does not directly override normal endocrine controls.
Question 4 of 5
Which artery generally gives rise to inferior thyroid artery?
Correct Answer: D
Rationale: Step-by-step rationale: 1. The inferior thyroid artery typically arises from the thyrocervical trunk. 2. The thyrocervical trunk is a branch of the subclavian artery. 3. This artery supplies blood to the thyroid gland. 4. The external carotid artery and internal carotid artery do not give rise to the inferior thyroid artery. 5. The brachiocephalic trunk does not directly supply blood to the thyroid gland. In conclusion, the correct answer is D because the thyrocervical trunk is the main artery that gives rise to the inferior thyroid artery, providing blood supply to the thyroid gland.
Question 5 of 5
Which of the following arteries supply the tail of pancreas?
Correct Answer: C
Rationale: The correct answer is C: Splenic artery. The splenic artery supplies the tail of the pancreas through its branches. The splenic artery runs along the superior border of the pancreas and gives off multiple branches that supply various parts of the pancreas, including the tail. A: Inferior pancreaticoduodenal artery supplies the inferior part of the pancreas. B: Left gastroepiploic artery supplies the greater curvature of the stomach. D: Superior pancreaticoduodenal artery supplies the pancreatic head and duodenum. Therefore, the splenic artery is the correct answer as it specifically supplies the tail of the pancreas.