Question

1. ___ increases the action of osteoblasts.

   1. Parathyroid hormone

   2. T3 and T4

   3. Glucago

   4. Aldosterone

   5. Calcitonin

2. Which of the following glands needs iodine to function properly?

   1. Hypothalamus

   2. Pituitary

   3. Adrenal

   4. Pancreas

   5. thyroid

3. The primary site for estrogen production is the ___

   1. Uterus

   2. Ovaries

   3. Mammary glands

   4. Hypothalamus

   5. Adrenal medulla

4. Thyroid-stimulating hormone is secreted by the ___

   1. Hypothalamus

   2. Anterior pituitary gland

   3. Posterior pituitary gland

   4. Thyroid gland

   5. None of the above

5. Which of the following is not a function of the endocrine system?

   1. Regulates metabolism

   2. Regulates the chemical composition and volume of the body’s internal environment

   3. Controls growth and development

   4. Quickly responds to stimuli by way of action potentials

   5. Regulates operation of the reproductive system

Answer 1

1. Parathyroid hormone is secreted by parathyroid gland . it affects kidney , bone and regulates the serum calcium level. Osteoblast are the cells responsible for bone formation. In case of osteoblast ,when parathyroid hormone is stimulated it binds to the cells and increases its activity .

Answer: Parathyroid hormone

2. Thyroid gland is one of the endocrine gland present in body, it is a ductless gland present in the neck. thyroid gland produces hormone which are essential for proper functioning of the cells present in the body.Thyroid gland secretes two hormones thyroxine (T4) and triiodothyronine (T3). These thyroid hormones are formed by the intake of iodine present in the food. So , iodine is an important component for the functioning of thyroid gland.

Answer: Thyroid Gland

3.The primary site of estrogen production in humans are ovary (ovarian granulosa cells to be precise).Estrogen is the female sex hormone responsible for the proper development of the secondary sexual character and  regulation of female reproductive system. Forms of estrogen present in female are estrone, estradiol, and estriol.

Answer: Ovary

4.Anterior pituitary gland secretes thyroid stimulating hormone (TSH) also known as thyrotropin. its function is to stimulate the thyroid gland to secrete thyroid hormones and along with this it regulates bodyweight, body temperature, muscle strength.

Answer:Anterior pituitary gland

5. Endocrine gland regulates the amount of hormone to be released.Functions of endocrine system includes :

• Regulation of metabolism , primarily done by thyroid gland.
• Regulates the chemical composition of the body. (volume of the body’s internal environment is controlled by excretory system)
• Controls growth and development
• Quickly responds to stimuli by way of action potentials
• Regulates operation of the reproductive system.

Answer: Regulates the chemical composition and volume of the body’s internal environment