7.1

Question 1

What are three roles of the endocrine system?

Answer 1

• Growth
• Homeostasis
• Reproduction

Question 2

List some major endocrine glands

Answer 2

• Thymus
• Thyroid
• Adrenals
• Pancreas
• Testes/ovaries
• Pituitary
• Pineal
• Hypothalamus

Question 3

List three non classical endocrine glands, and one hormone that each releases

Answer 3

• Heart (Atrial Natriuretic Peptide)
• Kidneys (Renin)
• Liver (IGF-1)

Question 4

Endocrine vs exocrine glands

Answer 4

Endocrine: ductless, release into surrounding fluid
Exocrine: contain ducts, release onto a surface

Question 5

What differentiates thyroid hormones from catecholamines?

Answer 5

Thyroid Hormones: Single benzene ring, no iodine
Catecholamines: Two benzene rings, ionidation

Question 6

Which type of amine hormone is hydrophilic and which is hydrophobic?

Answer 6

Hydrophilic: Catecholamines
Hydrophobic: Thyroid hormone

Question 7

List some organs that secrete steroid hormones, and the hormones they secrete

Answer 7

• Testes (testosterone)
• Ovaries (oestrogen/progesterone)
• Adrenal cortex (e.g. dehydroepiandrosterone)

Question 8

List some organs that secrete amine hormones and what they secrete

Answer 8

• Thyroid (T3 and T4)
• Adrenal glands (adrenaline)

Question 9

List some organs that secrete peptide hormones and what they secrete

Answer 9

• Heart (ANP)
• Ant. Pituitary (CRH, PRH)
• Post. Pituitary (oxytocin)