Sat 9th Nov - Hormonal Coordination

What is normal body temp?

37

What controls body temp?

Hypothalamus

Where is the hypothalamus?

Thermoregulatory system

What do the receptors in the thermoregulatory centre detect?

Temp changes in the blood that moves through the brain

What happens when you get to hot?

Sweating, body heat evaporates sweat, hairs lie flat, blood vessels expand

What happens when you get to cold?

Shivering, raised hairs to trap heat, blood vessels constrict, hair erector muscles contract

What is the master gland?

Pituitary gland

Where is the pituitary gland?

Brain

Where is the thyroid gland?

Neck

Where is the adrenal gland?

Above kidneys

What does the pituitary gland do?

Controls growth, stimulates thyroid gland, stimulates ovaries to make eggs and estrogen, stimulates testes to make sperm

What does the thyroid gland do?

Controls metabolic rate

What does the adrenal gland do?

Prepares the body for stressful situations

What does the pancreas do?

Control glucose levels

What do the ovaries do?

Control development of sexual characteristics, involves the menstrual cycle

What do the testes do?

Control development of sexual characteristics, production of sperm

What is glucose?

Simple suger

What is insulin?

Hormone

What does insulin do?

Tells the lover to convert excess glucose into glycogen

What is glycogen?

Stored glucose

What happens when glucose levels rise?

Pancreas releases insulin, body takes up more glucose or liver stores the glucose as glycogen

What happens when glucose levels lower?

Pancreas releases glucagon, liver breaks down glucagon into glucose

How can you treat type 1 diabetes?

Replacement insulin, monitor carb intake, plan exercise

How can you cure type 1 diabetes?

Pancreatic/ pancreatic cell transplant

How can you treat type 2 diabetes?

Balances diet, weight loss, regular exercise

How is carbon dioxide formed?

Respiration

Why does carbon dioxide need to be removed?

Makes blood acidic

How is carbon dioxide removed?

Exhaling

How is urea formed?

Excess amino acids are converted into ammonia in the liver and turned into urea

Why does urea need to be removed?

Toxic to cells

How is urea removed?

Moved from kidneys to the bladder via the bloodstream

What does your body have control over?

Water content that leaves the body

What does your body not have control over?

Urea, excess water, excess mineral ions removed

Ultra filtration

Blood enters the nephron under high pressure and waster products are removed through tubules

Selective reabsorbtion

Glucose, some water, glides, mineral ions and amino acids are reabsorbed

More water intake means

Diluted urine

Less water intake means

Concentrated urine

More water in the bloodstream

Less ADH

Less water in the bloodstream

More ADH