Negative Feedback: Thyroxin Levels (Grade 12 NSC Matric Life Sciences): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is basal metabolic rate (BMR)?
What is basal metabolic rate (BMR)?
Energy used when body is at rest
Which gland produces thyroxin?
Which gland produces thyroxin?
Thyroid gland
What is a key function of thyroxin in the body?
What is a key function of thyroxin in the body?
Increases metabolic rate
Why is iodine essential for thyroxin production?
Why is iodine essential for thyroxin production?
Thyroid needs iodine to make thyroxin
What does TSH (thyroid-stimulating hormone) do?
What does TSH (thyroid-stimulating hormone) do?
Stimulates thyroid to produce thyroxin
What happens when thyroxin levels drop below normal?
What happens when thyroxin levels drop below normal?
Pituitary increases TSH production
What occurs when thyroxin levels become too high?
What occurs when thyroxin levels become too high?
Pituitary reduces TSH production
Where is the thyroid gland located?
Where is the thyroid gland located?
In the neck
What is homeostasis?
What is homeostasis?
Keeping internal conditions stable
Which symptoms indicate hypothyroidism (too little thyroxin)?
Which symptoms indicate hypothyroidism (too little thyroxin)?
Fatigue, weight gain, depression