Living Control Mechanisms

Question 1

What are the 3 cellular signalling pathways

Answer 1

Autocrine -cells communicating with self

Paracrine- cell communicating with adjacent cell (short distance)

Endocrine- cells communicating with others elsewhere in the body

Question 2

List main endocrine organs

Answer 2

Pituitary
Hypothalamus
Ovaries
Testes
Thyroid
Adrenal glands
pancreas

Question 3

Define hormone

Answer 3

Molecule that act as a chemical messenger

Question 4

what are the 3 classifications of hormone

Answer 4

Amino-acid derivatives
Peptide
Steroid

Question 5

what are amino acid hormones synthesis from

Answer 5

Tyrosine

Question 6

give an example of an amino acid hormone

Answer 6

Adrenaline/epinepherine

Question 7

what are the properties of peptide hormones

Answer 7

Made from amino acid
Hydrophillic

Question 8

What are steroid hormones synthesised form

Answer 8

Cholesterol

Question 9

which classification of hormone/s have a quick reponse

Answer 9

Amino acid
Peptide

Question 10

Which classification of hormones/s have a slow response

Answer 10

Steroid

Question 11

what is positive feedback

Answer 11

amplification of a signal

Question 12

what is positive feedback

Answer 12

amplification of a signal

Question 13

what is a negative feedback loop

Answer 13

basis of homeostasis, maintaining balance

Question 14

give some examples of peptide hormoness

Answer 14

Insulin, growth hormone, TSH and ADH.