Nokea
Which of these is not an endocrine property?
- A. hormones reach targets through the blood
- B. effects are slow and cyclic
- C. rapid acting effects
- D. effects caused by chemicals.
Correct Answer: C
Rationale: The correct answer is C: rapid acting effects. Endocrine properties involve hormones reaching targets through the blood, causing slow and cyclic effects. Rapid acting effects are more characteristic of the nervous system, not the endocrine system. Endocrine effects are caused by chemicals, so choice D is incorrect.
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Identify the glands associated with these hormones: gonadotropins, aldosterone, and epinephrine.
- A. Adenohypophysis, neurohypophysis, pancreas
- B. Adenohypophysis, anterior pituitary, adrenal cortex
- C. Adenohypophysis, posterior pituitary, adrenal medulla
- D. Anterior pituitary, adrenal cortex, adrenal medulla
Correct Answer: D
Rationale: The correct answer is D because gonadotropins are secreted by the anterior pituitary gland, aldosterone is produced by the adrenal cortex, and epinephrine is released by the adrenal medulla. The anterior pituitary gland secretes gonadotropins such as FSH and LH. The adrenal cortex synthesizes aldosterone, which regulates sodium and potassium balance. The adrenal medulla produces epinephrine, involved in the fight or flight response. Choices A and C are incorrect because they do not match the correct associations of the hormones with their respective glands. Choice B is incorrect as the adrenal cortex and adrenal medulla are not part of the anterior pituitary gland.
The two regulatory systems of the body are the endocrine system and the .
- A. skeletal system
- B. immune system
- C. nervous system
- D. respiratory system
Correct Answer: C
Rationale: The correct answer is C: nervous system. The endocrine system regulates body functions through hormones, while the nervous system controls body functions through electrical impulses. Both systems coordinate and control various bodily functions. The skeletal system (A) supports and protects the body, the immune system (B) defends against pathogens, and the respiratory system (D) facilitates gas exchange. However, these systems do not primarily regulate and control bodily functions like the endocrine and nervous systems.
Which of the following is NOT an action of insulin?
- A. Stimulates cellular absorption of glucose.
- B. Stimulates cellular usage of glucose for energy.
- C. Stimulates the breakdown of glycogen.
- D. Lowers blood glucose levels.
Correct Answer: C
Rationale: Rationale:
C is correct because insulin does not stimulate the breakdown of glycogen. Insulin promotes the storage of glucose as glycogen, not its breakdown. A, B, and D are incorrect because insulin does stimulate cellular absorption of glucose, usage of glucose for energy, and lowers blood glucose levels, respectively. Insulin's main role is to facilitate the uptake and storage of glucose, not its breakdown.
____________ is a steroid hormone.
- A. Vitamin D
- B. Epinephrine
- C. Insulin
- D. all of these
Correct Answer: A
Rationale: Vitamin D is the correct answer as it is a steroid hormone synthesized from cholesterol. Steroid hormones are derived from cholesterol and have a similar chemical structure. Epinephrine and Insulin are not steroid hormones. Epinephrine is a catecholamine produced by the adrenal glands, and Insulin is a peptide hormone produced by the pancreas. Choice D is incorrect as not all options listed are steroid hormones.
Which colour change is observed when water is added to anhydrous cobalt(II) chloride?
- A. blue to white
- B. blue to pink
- C. white to blue
- D. pink to blue
Correct Answer: B
Rationale: The correct answer is B: blue to pink. Anhydrous cobalt(II) chloride is blue, and when water is added, it forms a pink hexahydrate complex. This color change occurs because water molecules replace the chloride ions in the crystal lattice, resulting in the formation of the pink complex. Choice A (blue to white) is incorrect because the addition of water does not change the color to white. Choice C (white to blue) is incorrect as anhydrous cobalt(II) chloride is blue to begin with. Choice D (pink to blue) is incorrect as the addition of water causes the color change from blue to pink, not the other way around.