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Biology > B3.2 > Flashcards

B3.2 Flashcards

1
Q

What is the endocrine system?

A

Endocrine system:

  • Collection of glands that secrete hormones
  • Travels in the blood
  • Reach a target organ to bring effect
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2
Q

What is homeostasis?

A

Homeostasis:

  • Helps to maintain a constant internal environment
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3
Q

What are characteristics of hormones?

A

Hormones:

  • Originate at glands
  • Travel in blood
  • Long lasting duration
  • Slow speed of action
  • Chemical signal type
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4
Q

What is the pituitary gland?

A

Pituitary gland:

  • Releases hormones, that can stimulate different glands to release hormones
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5
Q

What is the thyroid gland?

A

Thyroid gland:

  • Releases thyroxine
  • Controls metabolism
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6
Q

What is the adrenal gland?

A

Adrenal gland:

  • Releases adrenaline
  • Fight/flight response
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7
Q

What is the pancreas?

A

Pancreas:

  • Releases insulin
  • Controls blood sugar levels
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8
Q

What are the ovaries?

A

Ovaries:

  • Releases oestrogen and progesterone
  • Coordinates menstrual cycle
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9
Q

What are the testes?

A

Testes:

  • Produces testosterone
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10
Q

What is negative feedback?

A

Negative feedback:

  • Homeostatic change
  • Body detects change in environment
  • Makes adjustments to return back to normal
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11
Q

How does body react to change in thyroxine?

A

Thyroxine:

  • Brain detects change
  • Send signal to pituitary gland via motor neurone
  • Releases less thyroxine stimulating hormones
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12
Q

What is FSH? (1)

A

FSH:

  • Follicle stimulating hormone
  • Produced in pituitary gland
  • Travels to ovaries to stimulate oestrogen release
  • Matures egg
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13
Q

What oestrogen? (2)

A

Oestrogen:

  • Produced in ovaries
  • Thickens uterus lining
  • Inhibits FSH release
  • Stimulates LH release
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14
Q

What is LH? (3)

A

LH:

  • Luteinising hormone
  • Produced in pituitary gland
  • Ovulation (release of egg)
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15
Q

What is a condom?

A

Condom:

  • Non hormonal
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16
Q

What is a diaphragm cap?

A

Diaphragm cap:

  • Inserted into vagina
  • Prevents sperm from entering uterus
17
Q

What is an intrauterine contraception?

A

Intrauterine:

  • Releases progesterone
  • Thickens mucus
18
Q

What is non-hormonal contraception?

A

Non-hormonal:

  • Barrier methods
19
Q

What are hormonal contraception?

A

Hormonal:

  • Use hormones to disrupt female reproductive system
20
Q

What is in vitro fertilisation?

A

In vitro fertilisation:

  • Egg taken out and mixed with sperm in petri dish
  • Syringed into uterus after covered
21
Q

What is phototropism?

A

Phototropism:

  • Growth in response to light
22
Q

What is gravitropism?

A

Gravitropism:

  • Growth in response to gravity
23
Q

What is auxin?

A

Auxin:

  • Hormone released at growing tips of shoots
24
Q

What are gibberellins?

A

Gibberellins:

  • Overcome dormancy
25
Q

What is ethene?

A

Ethene:

  • Releases gas
  • Ripens other fruits

Biology (9 decks)

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