B1.2 - Nerves and Hormones 0.0 / 5 ? BiologyNervous system, hormones and behaviourGCSEAQA Created by: TBK_Wilson27Created on: 08-02-17 17:32 What do nerve cells do? Transmit impulses to and from the brain and spinal cord (CNS) 1 of 31 What do glands do? Secrete hormones into the blood 2 of 31 Which 4 parts of the body does adrenalin target? Heart, breathing mucles, eyes and digetsive system 3 of 31 What are nerve cells that transmit impulses from the receptors to the CNS called? Sensory Neurones 4 of 31 What are nerve cells that transmit impulses from the CNS to the effector called? Motor Nurones 5 of 31 Name all parts of the nervous system Receptor, sensory neurone, CNS, motor neurone, relay neurone, effector 6 of 31 Explain how sight works Photons of light fall onto a rod cell generating an electrical impulse. A pattern of imuplese in the brain generates a picture 7 of 31 What is a reflex arc? The pathway taken by nerve impulses 8 of 31 What is a synapse? The gaps between neurones 9 of 31 What happens when an impulse reaches the end of the neurone? A chemical is secreated which diffuses across the gap and restarts the impulse in the next neurone 10 of 31 How is water gained and lost? Gained through dribk and food and lost through breating, sweating and urine 11 of 31 What is dissloved in the blood, give an example Ions such as ones found in salt 12 of 31 How do kidneys help to balance water and ions? Varying the ammount of water and salt excreated 13 of 31 At what temperature do human enzymes work best? 37 degrees celcius 14 of 31 How is heat lost? Radiation from skin and evapouration of sweat 15 of 31 How do people conserve water? Keep cool, don't eat or talk and breath through your nose 16 of 31 What hormone is relased at the start of the menstrual cycle and by which gland Follicle Stimulating Hormone (FSH) relesaed by the pituitary gland 17 of 31 What does FSH cause? The egg to mature and the release of oestrogen by the ovaries 18 of 31 What does oestrogen do? Makes the lining of the uterus grow thicker 19 of 31 High levels of oestrogen stop what? The production of FSH 20 of 31 What does LH stand for and what does it do? Luteinising hormone - stimulates the release of eggs from the ovary 21 of 31 How does a contrceptive pill work? It contains oestrogen which stops FSH production meaning the eggs won't mature 22 of 31 What is ovulation? The release of an egg from the ovaries after 14 days 23 of 31 What hormone is a woman given in IVF and why? FSH - makes ovaries produce eggs 24 of 31 How does fertilistaion occur in IVF? Eggs are removed and mixed with partner's sperm 25 of 31 What is phototropism? A growth response to light 26 of 31 What is auxin? A plant hormone whcih makes cells in shoots get longer 27 of 31 How does auxin behave in phototropism? The auxin builds up in the shady side of the plant when exposes to light so the shoot bends to the light 28 of 31 What is gravitropism/geotropism A growth response to gravity 29 of 31 How does auxin behave in gravitropism/geotropism? The auxin accumalates in the lower root, reducing the growth rate causing the plant to bend downwards 30 of 31 Why do hormones affect weeds? They have a different metabolism 31 of 31
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