Which of these is not an endocrine property?

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.

Correct Answer: D

Rationale: The correct answer is D: Nervous system. The nervous system works closely with the endocrine system to regulate and coordinate the body's functions through the release of neurotransmitters and hormones. The nervous system controls rapid responses, while the endocrine system controls slower, long-term processes. The cardiovascular system (A) primarily transports blood and nutrients, the respiratory system (B) is involved in gas exchange, and the reproductive system (C) is responsible for reproduction, none of which directly coordinate with the endocrine system.

Correct Answer: B

Rationale: The correct answer is B: Insulin. Insulin is a protein hormone produced by the pancreas that regulates blood sugar levels. Proteins are large molecules made up of amino acids, and insulin fits this definition. Oxytocin (A) is a peptide hormone, not a protein. TSH (C) and ADH (D) are both peptide hormones as well, not proteins. In summary, insulin is the only option that fits the criteria of being a protein hormone.

Correct Answer: C

Rationale: The correct answer is C: Parthormone. The anterior pituitary gland secretes hormones such as Growth hormone, Follicle stimulating hormone, and Thyroid stimulating hormone, but not Parthormone. Parthormone is actually produced by the parathyroid glands, not the anterior pituitary gland. Parathormone plays a key role in regulating calcium levels in the blood. Therefore, choice C is incorrect as it does not belong to the hormones secreted by the anterior pituitary gland.

Correct Answer: C

Rationale: The correct answer is C: Hyperpigmentation. Addison's disease is a condition characterized by adrenal insufficiency, leading to decreased production of cortisol and aldosterone. Hyperpigmentation is a common symptom due to elevated levels of ACTH stimulating melanin production. Other choices are incorrect because Addison's disease typically presents with hypotension, weight loss, and bradycardia, rather than hypertension, weight gain, or tachycardia.