Waec Model Questions Vol1 2017 Biology Question 39

Practice objective / multiple choice question 39 from the 2017 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2017 Biology Objective / Multiple Choice Medium Difficulty
Question 39 WAEC_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • objective

Blood calcium concentration falls below the normal range. Identify the hormone that will be secreted in response and list its three main actions that help restore calcium homeostasis.

Answer Options

A. Thyroid hormone (T3); it increases renal calcium re‑absorption, stimulates bone formation, and enhances intestinal calcium absorption.
Correct Answer B. Parathyroid hormone (PTH); it increases renal calcium re‑absorption, stimulates osteoclast‑mediated bone resorption, and enhances intestinal calcium absorption via activation of vitamin D.
C. Vitamin D (calcitriol); it increases renal calcium re‑absorption, stimulates osteoblast activity, and enhances intestinal calcium absorption.
D. Calcitonin (CT); it decreases renal calcium re‑absorption, inhibits osteoclast‑mediated bone resorption, and reduces intestinal calcium absorption.
Correct Answer
B
Correct Option:
Parathyroid hormone (PTH); it increases renal calcium re‑absorption, stimulates osteoclast‑mediated bone resorption, and enhances intestinal calcium absorption via activation of vitamin D.

About This Question

This is Waec Model Questions Vol1 2017 Biology Question 39. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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