Hormonal control Flashcards

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1
Q

what is a hormone

A

hormones are chemical messengers released directly into the blood

they are carried in the blood to other parts of the body

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2
Q

what do hormones control

A

things in organs and cells that need constant adjustment

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3
Q

where are hormones produced

A

various glands called endocrine glands these make up your endocrine glands

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4
Q

what hormones does the pituitary gland produce

A

many hormones - regulate body conditions

called the master gland because these hormones act on other glands

directing them to release hormones that bring about change

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5
Q

what hormone does the thyroid produce

A

thyroxine

regulates the rate of metabolism, heart rate and temperature

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6
Q

what hormone does the adrenal gland produce

A

adrenaline

used to prepare the body fora fight or flight response

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7
Q

what is a fight or flight response

A

adrenaline is released in response to stressful or scary situations.

you brain detects this and sends nervous impulses to the adrenal glands - produce adrenaline

this gets the body ready for fight or flight by triggering mechanisms that increase the supply of oxygen and glucose to cells in the brain and muscles

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8
Q

what hormone does the pancreas produce

A

insulin

glucagon

regulates the blood glucose level

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9
Q

what hormone does the ovaries produce

A

oestrogen

progesterone

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10
Q

what hormone does the testes produce

A

testosterone

controls puberty and sperm production in males

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11
Q

name the main differences between nerves and hormones

A

nerves have a faster action whereas hormones have a slower action

nerves act for a very short time and act on a very precise area

hormones act for a long time and act in a more general way

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12
Q

what is stored in the liver as sugar

A

glycogen

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13
Q

if blood glucose level is too high

A

insulin is released

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14
Q

if blood glucose level is too low

A

glucose is released

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15
Q

what age does type 1 occur

A

4-7 years

11-14 years

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16
Q

what age does type 2 occur

A

45 or older

17
Q

causes of type 1

A

pancreas fails to produce enough insulin

18
Q

causes of type 2

A

body cells no longer respond to insulin

19
Q

symptoms of type 1

A

high blood sugar

excess urine loss

20
Q

symptoms of type 2

A

increased thirst

frequent urination

21
Q

treatment of type 1

A

regular insulin injections - not cured

22
Q

treatment of type 2

A

controlling diet

exersize

23
Q

how to cure type 1 diabetes

A

doctors can transplant a pancreas but it is expensive risky and there are not enough donors

24
Q

how is urine formed in the kidneys

A
  1. Filtration - The kidneys take Waste Products and other unwanted substances out of your blood, this is done by blood passing through the kidney
  2. selective reabsorption - useful substances are reabsorbed into the blood
    - All of the Glucose
    - Some of the water - rest is needed for osmosis
    - Some of the ions - needed by the body by active transport
    - Urea is not Absorbed
  3. formation of urine - molecules that were not re-absorbed continue along the tubule as urine which passes down to be stored in the bladder later to be released from the urethra
25
Q

where is FSH produced and what does it do

A

pituitary gland and matures egg, stimulates the ovaries to release the hormone oestrogen

26
Q

where is oestrogen produced and what does it do

A

ovaries, stops FSH being produced so that only one egg matures in a cycle.

also stimulates the pituitary gland to produce LH

27
Q

where is LH produced and what does it do

A

pituitary gland, stimulates the ovary to release the matured ovum

28
Q

where is progesterone produced and what does it do

A

Ovary

maintains the lining of the uterus

during the middle part of the menstrual cycle

during pregnancy

29
Q

why can some people have difficulty getting pregnant

A

some people do not make enough FSH to stimulate the eggs in the ovaries

if the woman’s fallopian tubes are damaged or blocked

30
Q

describe the process of IVF

A
  1. female is injected with FSH and LH. FSH causes egg to mature and LH causes egg to be released
  2. sperm is collected from the male and fertilisation takes place
  3. the egg cells are taken from the women and mixed with the sperm
  4. the fertilised egg begins to divide, forming an embryo
  5. the embryo is formed and placed in the uterus
  6. the baby is conceived
31
Q

what is ADH

A

anti-diuretic hormone

responsible for controlling the water levels

32
Q

what happens in terms of ADH when you drink lots of water

A

brain produces more ADH

high volume of water reabsorbed by kidney

low urine output

water content normal

33
Q

what happens in terms of ADH when don’t drink lots of water

A

brain produces less ADH

low volume of water reabsorbed by kidney

high urine output

water content normal

34
Q

go over plant hormones

A

read read read

35
Q

list the non hormonal contraceptives

A

condoms,
spermicidal agents,
surgery,
abstaining from intercourse (around the time of ovulation)

36
Q

list the hormonal contraceptives

A

oral (pill)
injection/implant
coil

37
Q

what is a hypertonic solution

A

a solution contains more dissolved particles - such as salt and other electrolytes

used for soaking wounds

38
Q

what is an isotonic solution

A

a solution that has the same salt concentration as cells and blood

39
Q

what is a hypotonic solution

A

a solution which has a lower concentration of solutes than another solution