Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

IB Biology 30 > Hormones > Flashcards

Hormones Flashcards

1
Q

Where is leptin secreted?

A

cells in adipose tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Where does leptin act?

A

acts on the hypothalamus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the role of leptin?

A

inhibit appetite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What causes the secretion of testosterone?

A

a gene on the y chromosome causes embryonic gonads to develop testes, which secretes testosterone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a gonad?

A

blanket term for reproductive tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does testosterone do?

A

causes prenatal development of male genitalia and both sperm production and development of male secondary sexual characteristics during puberty

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the role of estrogen and progesterone?

A

causes pre-natal development of female reproductive organs and female secondary sexual characteristics during puberty

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What controls the menstrual cycle?

A

negative and positive feedback mechanisms involving ovarian and pituitary hormones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What controls blood sugar?

A

insulin and glucagon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What happens when blood sugar levels are high?

A

Insulin is released from beta cells which signal adipose cells to intake glucose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What happens when blood sugar levels are too low?

A

Glucagon is released from alpha cells which signals liver to turn glycogen into glucose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Where are insulin and glucagon released?

A

Pancreas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Where is thyroxine released?

A

thyroid gland

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the role of thyroxine?

A

regulate metabolic rate and body temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is a symptom of low iodine levels?

A

Goitre

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is hypothyroid?

A

not enough thyroxine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is hyperthyroid?

A

too much thyroxine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Where does thyroxine act?

A

the whole body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What does thyroxine do?

A

signals anterior pituitary gland to release TFH

20
Q

What does TFH do?

A

signals pituitary gland to release TSH

21
Q

What does TSH do?

A

stimulates thyroid to release thyroxine

22
Q

What is the role of melatonin?

A

biological clock, control circadian rhythms

23
Q

Where does melatonin act?

A

many organs

24
Q

Where is melatonin secreted?

A

pineal gland

25
Q

What inhibits melatonin release?

A

bright light

26
Q

What is a steroid hormone?

A

lipophilic hormones which difuse through a membrane binding to hormone receptor complexes which then bind directly to DNA

27
Q

What is a peptide hormone?

A

lypophobic hormone which binds to receptors on the exterior of cells which use relay molecules to send a message

28
Q

What is the hypothalamus?

A

A region in the brain which is in control of the endocrine system; receives signals from nerves as well can be triggered by hormones in the blood

29
Q

What is the anterior gland of the pituitary gland

A

Gland which secretes hormones according to signals from the hypothalamus

30
Q

What is the posterior gland of the pituitary gland?

A

Releases hormones produced by the hypothalamus

31
Q

What is GnRH?

A

Hormone produced in the hypothalamus, responsible for releasing LH and FSH from the anterior pituitary gland

32
Q

What is CRH?

A

Hormone created by the hypothalamus which controls stress levels, triggers release of ACTH from the anterior pituitary gland

33
Q

What is ACTH?

A

Hormone released from the anterior pituitary gland which is related to stress regulation

34
Q

What is the target organ of ACTH?

A

Adrenal Cortex

35
Q

What is PRH?

A

Hormone released from the hypothalamus which releases Prolactin

36
Q

What is prolactin?

A

Organ which enables women to produce milk

37
Q

What is the target organ of prolactin?

A

mammary gland

38
Q

What is GHRH?

A

hormone released from the hypothalamus to the anterior pituitary gland to signal released of growth hormone

39
Q

What is GH?

A

growth hormone, Peptide hormone which travels from the anterior pituitary gland to signal growth

40
Q

What is the target organ of the GH?

A

Liver and others

41
Q

What is ADH?

A

Hormone released from the hypothalamus and then the posterior pituitary gland, signals liver to control water levels in blood

42
Q

What is Oxytocin?

A

Hormone released from the hypothalamus and the posterior pituitary gland to stimulate lactation as well as other related functions with having a child

43
Q

What is an autocrine cell?

A

releases hormones to self trigger itself

44
Q

What is a paracrine cell?

A

releases hormones to trigger neighbouring cells

45
Q

What is an endocrine cell?

A

releases hormones to trigger distant cells

IB Biology 30 (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions