14 Hormonal Communication

Question 1

What do endocrine glands secrete and where are they secreted?

Answer 1

Hormones

Bloodstream

Question 2

Examples of endocrine glands?

Answer 2

Pancreas

Adrenal

Question 3

How may a gland be stimulated?

Answer 3

Change in conc of a substance (I.e blood glucose conc)

Or

As a result of another hormone or nervous impulse

Question 4

What do hormones bind to?

Answer 4

Target cells

Question 5

2 types of hormones?

Answer 5

Steroid

Non steroid

Question 6

Describe steroid hormones and give an example

Answer 6

Lipid soluble
Receptors may be present in cytoplasm or nucleus
Acts as a transcription factor which facilitates or inhibits transcription of a gene
Example= oestrogen

Question 7

Describe non steroid hormones and give an example

Answer 7

Hydrophilic

Bind to receptors on cell surface membrane on target cells
Triggers cascade reaction mediate by second messengers
Example= adrenaline

Question 8

What are the two parts that make up an adrenal gland? And give examples of hormones produced here

Answer 8

Adrenal cortex (outside, produces hormones vital to life I.e cortisol)

Adrenal medulla (inside, produces non essential hormones I.e adrenaline and noradrenaline)

Question 9

14.2

Answer 9

Structure and function of pancreas

Question 10

2 functions of pancreas

Answer 10

Exocrine gland

Endocrine gland