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IGCSE O Level Biology Practice Tests

IGCSE O Level Biology Online Tests

Thyroxin Function Multiple Choice Questions (MCQ) PDF Download

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Thyroxin Function MCQ Quiz PDF Download: IGCSE Biology MCQs

MCQ 1: Thyroxin is secreted from

A) thiamine deficiency
B) theological inheritance
C) thyroid glands
D) muscles used for breathing

MCQ 2: An overactive thyroid gland may

A) slow the metabolic rate
B) expedite the metabolic rate
C) may denature the metabolic enzymes
D) may increase the pH from 7 to 9 approx.

MCQ 3: Apart from other reasons, excess thyroxin may cause

A) myxedema
B) heart attack
C) meningitis
D) obesity

MCQ 4: Function of thyroxin is to regulate the

A) breathing rate
B) metabolic rate
C) sweat glands
D) prevention of heat loss

IGCSE O Level Biology Practice Tests

Thyroxin Function Learning App & Free Study Apps

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O Level Biology App (Android & iOS)

ALL-in-ONE Learning App (Android & iOS)

O Level Biology App (Android & iOS)

O Level Biology App (Android & iOS)

9th Grade Biology App (Android & iOS)

9th Grade Biology App (Android & iOS)

10th Grade Biology App (Android & iOS)

10th Grade Biology App (Android & iOS)