receptors
- Created by: sb2.0
- Created on: 02-05-17 12:19
View mindmap
- Receptors
- Pacinian corpuscle
- responds to mechanical pressure
- acts as transducer
- neurone ending in center surrounded by tissue layers
- 1. Pressure applied
- 2. stretches, widening Na+ channels
- 3. Na+ diffuse in, membrane = depolorised
- 4. action potential forms
- 3. Na+ diffuse in, membrane = depolorised
- 2. stretches, widening Na+ channels
- 1. Pressure applied
- Receptor= a structure on a surface membrane that binds with another substance
- Receptor= a cell adapted to detect a change in the environment
- Receptor= a structure on a surface membrane that binds with another substance
- Proteins
- enzymes
- act from receptor sites on DNA
- enzymes
- homeostasis
- Blood glucose
- Monitored by the Islets of Langerhans in the pancreas
- Receptors= a cells, b cells
- CYCLE
- Monitored by the Islets of Langerhans in the pancreas
- Water potential
- Osmoreceptors (brain)
- Temperature
- Thermoreceptors (skin)
- Controlled by the hypothalamus
- shiverring
- change in skin hairs
- vasodilation/vasoconstriction
- Controlled by the hypothalamus
- Thermoreceptors (skin)
- Blood glucose
- reflex arc
- 1. stimulus (thermoreceptors)
- 2. receptor detects stimulus (increased temp)
- 3. sensory neurone (sends impulse)
- 4. intermediate neurone (CNS)
- 5. Motor neurone (sends impulse to effector)
- 4. intermediate neurone (CNS)
- 3. sensory neurone (sends impulse)
- 2. receptor detects stimulus (increased temp)
- 1. stimulus (thermoreceptors)
- Eye
- Rod cells (B&W) - lots, conc. at the fovea
- can't distinguish between different wavelengths of light
- Cone cells (C) - few, spread out at the peripharey
- light receptors
- Rod cells (B&W) - lots, conc. at the fovea
- can't distinguish between different wavelengths of light
- Rod cells (B&W) - lots, conc. at the fovea
- colour due to different types stimulated, 1 cone cell - 1 bipolar neurone = clear vision
- light receptors
- Rod cells (B&W) - lots, conc. at the fovea
- Glycoproteins
- Proteins
- enzymes
- act from receptor sites on DNA
- enzymes
- on surface, different types on different cells
- protein with a carbohydrate attached
- Proteins
- Pacinian corpuscle
- Cancer = uncontrolled cell growth
- Breast Cancer (increased oestrogen)
- Receptors
- Pacinian corpuscle
- responds to mechanical pressure
- acts as transducer
- neurone ending in center surrounded by tissue layers
- 1. Pressure applied
- 2. stretches, widening Na+ channels
- 3. Na+ diffuse in, membrane = depolorised
- 4. action potential forms
- 3. Na+ diffuse in, membrane = depolorised
- 2. stretches, widening Na+ channels
- 1. Pressure applied
- Receptor= a cell adapted to detect a change in the environment
- homeostasis
- Blood glucose
- Monitored by the Islets of Langerhans in the pancreas
- Receptors= a cells, b cells
- CYCLE
- Monitored by the Islets of Langerhans in the pancreas
- Water potential
- Osmoreceptors (brain)
- Temperature
- Thermoreceptors (skin)
- Controlled by the hypothalamus
- shiverring
- change in skin hairs
- vasodilation/vasoconstriction
- Controlled by the hypothalamus
- Thermoreceptors (skin)
- Blood glucose
- reflex arc
- 1. stimulus (thermoreceptors)
- 2. receptor detects stimulus (increased temp)
- 3. sensory neurone (sends impulse)
- 4. intermediate neurone (CNS)
- 5. Motor neurone (sends impulse to effector)
- 4. intermediate neurone (CNS)
- 3. sensory neurone (sends impulse)
- 2. receptor detects stimulus (increased temp)
- 1. stimulus (thermoreceptors)
- Eye
- Cone cells (C) - few, spread out at the peripharey
- light receptors
- colour due to different types stimulated, 1 cone cell - 1 bipolar neurone = clear vision
- light receptors
- Cone cells (C) - few, spread out at the peripharey
- Glycoproteins
- on surface, different types on different cells
- protein with a carbohydrate attached
- Pacinian corpuscle
- Normal
- Normal
- more glucose from diet
- rise detected,b cells, insulin produced
- Increased cell respiration
- Normal
- glucose to glycogen
- glucose to fat
- amino acids to glucose (gluconeogenesis)
- 6. effector (causes change)
- 7. response (best for survival)
- Synapse transmission
- neuromuscular junction (same as s but with it attached to a muscle membrane)
- 1. action potential enters the presynaptic neurone
- 2. calcium ion channels open allowing Ca2+ ions to enter (facillitated diffusion)
- 3. synaptic vesicles fuse with the presynaptic membrane, releasing neurotransmitter (acetylcholine)
- 4. Neurotransmitter diffuses across the synaptic cleft, then binds to a receptor on Na+ ion channels on the post synaptic membrane
- 5. Na+ channels open, Na+ ions diffuse into post synaptic vescicle
- 6. Na+ influx generates a new action potential
- 7. Neurotransmitter hydrolyses, diffuses back into pre synaptic neurone , reforms due to ATP from mitochondria
- 6. Na+ influx generates a new action potential
- 5. Na+ channels open, Na+ ions diffuse into post synaptic vescicle
- 4. Neurotransmitter diffuses across the synaptic cleft, then binds to a receptor on Na+ ion channels on the post synaptic membrane
- 3. synaptic vesicles fuse with the presynaptic membrane, releasing neurotransmitter (acetylcholine)
- 2. calcium ion channels open allowing Ca2+ ions to enter (facillitated diffusion)
- 4. Neurotransmitter diffuses across the synaptic cleft, then binds to a receptor on Na+ ion channels on the post synaptic membrane
- 5. Na+ channels open, Na+ ions diffuse into post synaptic vescicle
- 6. Na+ influx generates a new action potential
- 7. Neurotransmitter hydrolyses, diffuses back into pre synaptic neurone , reforms due to ATP from mitochondria
- 6. Na+ influx generates a new action potential
- 5. Na+ channels open, Na+ ions diffuse into post synaptic vescicle
- nearly everything(water, salts, glucose, urea, etc.) removed from blood
- useful products reabsorbed
- Antidiuretic hormone (ADH)
- low water potential
- more ADH released =distal convoluted tuble more permeable = more water reabsorbed
- high water potential
- controlled by the hypothalamus
- kidneys (effector) - see diagrams in notes
- nearly everything(water, salts, glucose, urea, etc.) removed from blood
- useful products reabsorbed
- nearly everything(water, salts, glucose, urea, etc.) removed from blood
- kidneys (effector) - see diagrams in notes
- low water potential
- increased oestrogen = more transcription
- oestrogen binds to receptor site on transcription factor
- activates DNA binding site, dif. shape
- transcription factor binds to DNA
- binds to promoter sequence of DNA
- transcription occurs
- more protein produced
- normally proto-oncogene/oncogene transcribed
- increased cell division
- normally proto-oncogene/oncogene transcribed
- more protein produced
- transcription occurs
- binds to promoter sequence of DNA
- transcription factor binds to DNA
- activates DNA binding site, dif. shape
- oestrogen binds to receptor site on transcription factor
Comments
No comments have yet been made