Core Biology Chapter 2 AQA 0.0 / 5 ? BiologyNervous system, hormones and behaviourGCSEAQA Created by: taylagreen16Created on: 05-05-16 17:34 What does nervous system have Receptors to detect stimuli 1 of 24 Where are receptors found In sense organs; eyes, nose, ear, tongue, skin 2 of 24 Explain eye reflex Light stimuates receptors in eye and electrical impulses then pass to brain along neurons. 3 of 24 Name 4 stimuli Sound, chemicals, Temp changes, touch, pain 4 of 24 What are neurons Nerve cells that carry electrical impulses 5 of 24 What forms the CNS Brain and spinal cord 6 of 24 How do impulses pass from receptor to CNS Motor neurons carry impulses from CNS to effector organs. Muscles/glands respond by secreting chemicals (glands), Contracting (muscles 7 of 24 Where is FSH produced and what does it do Made by pituitary gland and causes the egg to mature and oestrogen to be produced 8 of 24 Where is oestrogen produced and what does it do Produced by ovaries and inhibits further prodcution of FSH. Also it stimulates production of LH and stimuates womb lining to recieve fertilised egg 9 of 24 Where is LH (luteinising hormone) produced and what does it do Made by pituitary gland and stimulates mature egg to be released from ovary 10 of 24 What does the contraceptive pill contain Oestrogen and progesterone 11 of 24 Why do some people use progesterone only pill Have fewer side effects 12 of 24 What does the contaceptive pill do Prevents production of FSH so no eggs mature 13 of 24 Which hormone is inhibited by the contraceptive pill but is given in fertility treatment FSH 14 of 24 2 advantages of IVF and Contra pill Reduce family size, helps women plan pregnancies, IVF- Helps couple have baby, Fertility drugs can help infertile couples of kids 15 of 24 2 disadvantages of IVF and Contra pill Can cause side effects, objections due to ethical use, IVF- expensive process, unethical if women are older 16 of 24 Name 4 internally controlled conditions Water content, Ion content, Temperature, blood sugar levels 17 of 24 How do we lose water and ions from our body Breathe out/sweat, ions- Sweat and urine 18 of 24 What is the function of the pancreas Level of blood sugar is controlled 19 of 24 Why is it important to control our body temperature Otherwise our enzymes will denature (wont work properly) 20 of 24 Define phototropism Plant shoots grow towards light 21 of 24 Define gravitropism Roots grow down towards gravity 22 of 24 Name one plant hormone Auxin 23 of 24 Why do plant shoots bend towards the light Unequal distributions of auxin causes unequal growth of the shoot 24 of 24
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