Thyroid

Question 1

What hormones are secreted by the thyroid gland?

Answer 1

thyroxine (T4)
Triiodothyronine (T3)
Calcitonin

Question 2

What do the hormones secreted by the thyroid affect?

Answer 2

Metabolism, growth and development

Question 3

What connects the thyroid’s right and left lobes across the midline of the body?

Answer 3

The isthmus

Question 4

The thyroid is located ____ to the larynx and _____ to the trachea

Answer 4

inferior to the larynx
anterior to the trachea

Question 5

The adult thyroid gland measures approximately ___ to ___ cm in length, and _____ to ____ cm in anteroposterior and transverse diameter

Answer 5

4-6cm in length
1.3-1.8 cm anteroposterior

Question 6

Average weight of the thyroid is approximately ____ grams

Answer 6

25grams

Question 7

What hormone controls the secretion of hormones from the thyroid gland?

Answer 7

Thyroid-stimulating hormone (TSH)

Question 8

Out of the three hormones secreted by the Thyroid, which is the primary hormone?

Answer 8

Thyroxine (T4) is secreted 90% of the time

Question 9

What part of the thyroid secretes calcitonin?

Answer 9

Parafollicular cells (C cells)

Question 10

What does calcitonin do?

Answer 10

Decreases blood calcium levels

Question 11

Label the following structures:

Answer 11