Session 1

Question 1

What are the main extracellular signalling groups? (3)

Answer 1

Endocrine
Paracrine
Autocrine

Question 2

What do glands produce?

Answer 2

Hormones

Question 3

What are the three main types of signalling molecules?

Answer 3

Hydrophilic 1-amines-AA derivatives-small charged hydrophilic, receptors in plasma membrane
Hydrophilic 2-peptides to proteins-short chain to many, receptors in plasma membrane
Lipophilic-steroids-common derivation from cholesterol, receptors are intracellular

Question 4

What is the range of signalling molecules?

Answer 4

Picomolar to nanomolar