Endocrine System Flashcards
What is the endocrine system?
A collection of glands from around the body
What is a gland responsible for?
Manufacturing, storing and releasing at least 1 specific hormone
Hormones r involved in regulating what 4 things
Metabolism
Growth
Reproductive function
Body’s stress response
How do hormones get to their target
Through bloodstream
Hormones control processes that require speed of action or duration of action
Duration of action
What mechanism controls homeostasis/ the activity of hormones?
Negative feedback mechanism
Name this hormone secretion pattern
Constant secretion pattern
Name this hormonal secretion pattern
Episodic secretion pattern
Name this hormonal secretion pattern
Diurnal secretion pattern
What does it mean if a tumours functioning?
Too much hormone secreted
What does it mean if a tumours non functioning?
Destroys glands and too little hormone secreted
What’s hypersecretion of a hormone?
Too much secretion of hormone
What is hyposecretion of a hormone?
Too little hormone secreted
Name the 2 endocrine glands in the head
Hypothalamus and pituitary gland
Name the two different types of gland in the neck
4 parathyroid glands and thyroid gland
Name two different glands in the abdomen
2 adrenal glands and the pancreas
Name the glands in the female pelvis
2 ovaries
Name the glands in the male perineum
2 testes
Name this section
Diencephalon
Name this structure
Thalamus
Name this structure
Hypothalamus
Name this structure
Midbrain
Name this structure
Pons
Name this structure
Medulla
Name this structure
Spinal cord
Name this structure
Brainstem
Name this structure
Pituitary gland
Name this structure
Infundibulum
Name this structure
Posterior lobe
Name this structure
Anterior lobe
Name this structure
Sphenoid bone
What r the two hormones produced by the posterior pituitary lobe?
Oxytocin
Vasopressin
What does oxytocin do, 3 things?
- Ejection of breast milk
- Stimulated uterine contraction in childbirth
- Social bonding
What does vasopressin do?
Aids water retention
What is the name of the portal system for the endocrine system
Hypophyseal portal system
What r the two different types of hormone that hypothalamic neurons secrete?
Releasing hormones
Release-inhibitory hormones
What do releasing hormones do?
Stimulate the anterior pituitary to release its hormone(s) into the blood stream
What do release-inhibitory hormones do?
Prevent the anterior pituitary releasing hormone(s) into the blood stream
Anterior pituitary cells secrete either what 6 things?
- Growth hormone (GH)
- Prolactin
- Thyroid stimulating hormone (TSH)
- Adrenocorticotrophic hormone (ACTH)
- Luteinising hormone (LH)
- Follicle stimulating hormone (FSH)
How does the hormones travel from the hypothalamus to the rest of the body?
- Hypothalamus neurons release hormones
- Hypophyseal portal veins
- Anterior pituitary gland releases hormones
- Hypophyseal portal veins
- Superior vena cava
Name this structure
Epiglottis
Name this structure
Hyoid bone
Name this structure
Thyroid cartilage
Name this structure
Cricoid cartilage
Name this structure
Larynx
Name this structure
Right lobe of thyroid gland
Name this structure
Left lobe of thyroid gland
Name this structure
Isthmus
The thyroid gland uses what to manufacture hormones?
Iodine
The thyroid gland used iodine to manufacture what 2 hormones?
Triiodothyronine (T3)
Thyroxine (T4)
What 3 things do the thyroid hormones do?
Regulate metabolism
Stimulate growth
Used in development of the nervous system
Name this structure
Epiglottis
Name this structure
Hyoid bone
Name this structure
Thyroid cartilage
Name this structure
Right parathyroid glands
Name this structure
Trachea
Name this structure
Left parathyroid glands
Name this structure
Cricoid cartilage
What does the parathyroid hormone do?
Controls the amount of Calcium in blood and bone
Name this structure
Left superior thyroid artery
Name this structure
Left Carotid artery
Name this structure
Arch of the aorta
Name this structure
Right subclavian artery
Name this structure
Right inferior thyroid artery
Name this structure
Left internal jugular vein
Name these structures
Right superior, middle and inferior veins
Name this structure
Superior vena cava
What r the two anatomically and functionally distinct parts of the pancreas?
Endocrine pancreas
Exocrine pancreas
What does the endocrine pancreas do, give an example?
Manufacture various hormones
Insulin secreted into the blood in response to islet of langerhans cells detecting increased blood glucose
What does the exocrine pancreas do?
Manufactures digestive enzymes and secreted them via a duct system into the duodenum
What r the two types of diabetes mellitus, explain?
Type 1: failure to produce insulin
Type 2: target cells fail to respond to insulin
Name this structure
Bile duct
Name this structure
Pancreatic duct
Name this structure
Major duodenal papilla
Where is the pancreas relative to the peritoneum?
Retroperitoneal
Where is the pancreas relative to the vertebra?
Overlying L1/L2 vertebra
Where is the pancreas relative to the stomach
Posterior
What is the pancreas anterior to?
aorta And inferior vena cava
Where is the pancreas between?
Duodenum and spleen
Where does arterial blood supply to the pancreas come from? 2 things
Coeliac trunk
Superior mesenteric artery
Name this structure
Coeliac trunk
Name this structure
Superior mesenteric artery
Where does venous blood from the pancreas drain into? 3 things
Splenic vein
Superior mesenteric vein then portal vein
Where r the adrenal glands in relation to peritoneum
Retroperitoneal
Where r the adrenal glands in relation to the kidneys
Superior to kidneys
What separates the adrenal glands from the kidneys?
Fascial septum
What r the two anatomical and functional parts of the adrenal glands which secrete hormones?
Adrenal cortex
Adrenal medulla
What 3 hormones does the adrenal cortex secrete?
Glucocorticoids
Mineralocorticoids
Androgens
What 2 hormones does the adrenal medulla secrete?
Adrenaline
Noradrenaline
Name this structure
Inferior vena cava
Name this structure
Aorta
Name this structure
Coeliac trunk
Name this structure
Superior mesenteric artery
Name this structure
Left superior suprarenal arteries
Name this structure
Left middle suprarenal artery
Name this structure
Left inferior suprarenal artery
Name this structure
Renal artery
Name this structure
Inferior vena cava
Name this structure
Left suprarenal vein
Name this structure
Left renal vein
Name this structure
Right suprarenal vein
Where r the testes located?
In the scrotum of the male perineum
Where is the arterial supply to the testes from?
Abdominal aorta
What does the testes secrete in response to leutinising hormone from the anterior pituitary gland
Testosterone
What does testosterone control? 3 things
Male secondary sex characteristics
Closure of epiphyseal growth plates
Stimulates sperm production
Name this structure
Gonadal artery and veins
Name this structure
Testes
Name this structure
Scrotum
Where do the overies lie?
In the pelvic cavity
What do the ovaries secrete in response to FSH & LH from the anterior pituitary?
Oestrogen and progesterone
What does progesterone do?
Prepared the uterus for pregnancy
What does oestrogen control? 2 things
Female secondary sex characteristics
Ovum development
Name this structure
Gonadal artery and veins
Name this structure
Ovary
Name this structure
Broad ligament of the uterus
Name this structure
Uterus
The gonadal arteries branch off the what?
Abdominal aorta
Name this structure
Gonadal arteries
Where does the right gonadal vein drain to?
Directly into the inferior vena cava
Where does the left gonadal vein drain into?
The left renal vein
Name these structures
Right and left gonadal vein