The endocrine system Flashcards
What part of the brain is responsible for controlling the release of hormones from the pituitary gland?
The hypothalamus, which is connected to the pituitary gland.
What makes the hypothalamus the “control system” which regulates the endocrine system?
The fact it is responsible for the release and control of hormone levels from the pituitary gland (master gland) which control the levels of other hormones.
Which gland is often referred to as the “master gland”?
The pituitary gland.
Why is the pituitary gland known as the “master gland”?
Because the hormone released by the pituitary gland control and stimulate the release of hormones from other endocrine glands.
What are the two divisions of the pituitary?
The anterior and the posterior.
Where is oxytocin released from?
The posterior pituitary gland.
Where is adrenocortical trophic hormone (ACTH) released from?
The anterior pituitary gland.
Cortisol is a steroid hormone that evokes stress, what hormone causes cortisol release?
Adrenocortical trophic hormone (ACTH).
What hormone is released from the thyroid gland?
Thryoxine.
What is the function of oxytocin?
Uterus contractions during childbirth.
Which hormone is referred to as the ‘love hormone’?
Oxytocin.
What is the function of thryoxine.
Regulating metabolism.
What is the function of adrenocortical trophic hormone (ACTH)?
Stimulates the adrenal cortex and the release of cortisol during the stress response.
What implications would a hyper-active thyroid gland have?
A very high metabolism, making it very hard to remain at a healthy weight.
Where is melatonin released from?
The pineal gland.
Where is the pineal gland located?
In the centre of the brain, slightly offset from the hypothalamus.
Name a hormone released form the posterior pituitary gland:
- Oxytocin.
- Anti-diuretic hormone (ADH).
Name a hormone released form the anterior pituitary gland:
- Adrenocortical trophic hormone (ACTH).
- Luteinizing hormone (LH).
- Thyroid-stimulating hormone (TSH).
- Growth hormone (GH).
- Prolactin.
- Follicle-stimulating hormone (FSH).
What hormone is released from the pineal gland?
Melatonin.
Where is the thyroid gland?
The butterfly-shaped gland sits low on the front of the neck, below your Adam’s apple, along the front of the windpipe.
The thyroid has two side lobes, what connects the two?
A bridge called isthmus.
What is the function of melatonin?
Controls biological rhythms such as the sleep-wake cycle.
What hormone is released from the adrenal medulla?
The medulla releases both adrenaline and noradrenaline, which act in the flight / fight response.
Describe the structure of the adrenal gland:
Two parts; medulla and cortex. The medulla is wrapped within the cortex.
Where is cortisol released from?
The adrenal cortex.
Where are the adrenal glands located?
They sit like sandbags on top of the kidneys.