T2 Cells & Control
- Created by: egrnbrg
- Created on: 10-03-19 15:55
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- T2 Cells & Control
- Mitosis/Cell Division
- Interphase - chromosome copying
- Prophase -nucleus break down, SF appear
- Metaphase -chromosome middle line up on SF
- Anaphase - separated chromosome on SF
- Telophase - membrane + nuclei formed
- Cytokinesis - cell surface membrane separates cells in plants
- daughter cells 46 chromosomes
- Diploid, Haploid -half
- Telophase - membrane + nuclei formed
- Anaphase - separated chromosome on SF
- Metaphase -chromosome middle line up on SF
- 2 attached X shapes
- Prophase -nucleus break down, SF appear
- Cancer tumours= cell divides uncontrollably
- Stem Cells: embryonic, adult + meristem cells
- Replace faulty cell but may cause cancer
- Interphase - chromosome copying
- Animal Growth
- Plant Growth
- mitosis in meristems, elongation, differentiation
- Specialised cells: root hair cells, xylem cells
- mitosis in meristems, elongation, differentiation
- mitosis, cell differentiation =specialised 4 function
- Specialised cells: red blood cell, fat cell, nerve cell, muscle cell
- Percentile charts
- Plant Growth
- The Brain
- Cerebellum (back) -coordination, balance, movement
- Mendulla Oblongata (connects brain 2 spinal cord) - heart, breathing rate + reflexes
- Cerebral hemispheres- learning, memory, voluntary movement
- Spinal Cord damage = reduced flow of info to brain + body
- Nerve Damage = loss of feeling in legs
- Neck Damage = loss of feeling in arms + legs
- Brain Tumour can squash parts of brain, cut out by radiotherapy- X-ray + chemotherapy-injection, blood-brain barrier
- Nerve Damage = loss of feeling in legs
- Mendulla Oblongata (connects brain 2 spinal cord) - heart, breathing rate + reflexes
- CT = X-ray + PET scans= injection
- Central Nervous System = brain +spinal cord
- Stimulus --> Receptor--> Sensory neurone--> Relay neurone (in spinal cord)---> Motor neurone--> Effector--> Response
- Axon carries impulses away from cell body
- Dendrite receives impulses
- Myelin Sheath insulation for neurone, fast travels, energy
- Synapse= small gap where 2 neurones meet
- Myelin Sheath insulation for neurone, fast travels, energy
- Dendrite receives impulses
- Axon carries impulses away from cell body
- Reflex Arc: involuntary response, avoids brain
- Stimulus --> Receptor--> Sensory neurone--> Relay neurone (in spinal cord)---> Motor neurone--> Effector--> Response
- The Eye = sensory receptor
- Receptor cells in Retina
- Ciliary Muscles CONTRACT NEAR, RELAX FAR
- Cornea focuses light
- Lens bends light rays
- Cornea focuses light
- Cones-Colour Rods-Light Intensity
- Iris contract to constrict pupil in BRIGHT light, dilates pupil in DIM light
- Ciliary Muscles CONTRACT NEAR, RELAX FAR
- Eye Problems Cataracts (cloudy), Colour (cones) blindness, Long/Short sight (eyeball or cornea)
- Cataracts use artificial lens
- Short sight use diverging lens, long sight use converging lens, glasses/laser
- No correction 4 colour blindness
- Short sight use diverging lens, long sight use converging lens, glasses/laser
- Cataracts use artificial lens
- Receptor cells in Retina
- Cerebellum (back) -coordination, balance, movement
- Mitosis/Cell Division
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