Question

Plz write in your own text and don't copy answers that was answered before since my teacher has (Plagiarism checker) thank you

1. Describe the different areas of the adrenal gland. What is the function of each? Which area stains the lightest on the microscope slide and why?

2. What is the role of the posterior pituitary, and what is its histology? Use your observations of the slide viewed in this laboratory to support your answer.

3. What role do the follicles in the ovary play in the endocrine system?

4. Describe the difference between tropic and non-tropic hormones

5.What is negative feedback, and how is it applied to the endocrine system?

Answer 1

Answer 1:

Adrenal gland has two areas; Capsule, Adrenal cortex and Adrenal medulla.

Capsule is the outer layer of adrenal glands which is made up of fat and it protects adrenal gland.

Adrenal cortex is present in the outer part of adrenal gland. The adrenal cortex has three zones; zona glomerulosa, zona fasciculata and the zona reticularis. Zona glomerulosa produces aldosterone. Zona fasciculata produces Cortisol. Cortisol regulates metabolism and stress whereas aldosterone controls blood pressure. Zona reticularis produces androgens which are sex hormones.

Adrenal medulla is present in the inner part of adrenal gland and it secretes adrenaline(epinephrine) and noradrenaline(norepinephrine) which takes part in fight or flight response.

Adrenal medulla stains lightly on microscope slide as compared to adrenal cortex after H and E staining (Hematoxylin and eosin stain) because of presence of epinephrine secreting cells in adrenal medulla. Majority of adrenal medulla produces epinephrine hence adrenal medulla is lightly stained.