lecture 6

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  • Created by: The Shrew
  • Created on: 18-05-16 10:35
2 ways brain communicates with body
Nerves- autonomic nervous system- quick and short lasting/ Hormones- slower and longer lasting
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Hormones produced in the
Hypothalamus (in the Diencephalon)
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Hormones are chemical messengers that are secreted by a
Gland or cell
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They are secreted into
The blood stream and bind to cells that have their receptors
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Things can be both hormones and neurotransmitters and do different things
Just depends on the receptor
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Testosterone has an embroyological origin in
Pituitary gland- Rathke's pouch and floor of diencephalon
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Or it can be produced in
the roof of the mouth! not neural
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Hypothalamus controls pituitary gland with 2 mechanisms
Anterior- controlled with blood (not actually part of nervous system)/ Posterior- neural connection
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Anterior mechanism for testosterone
Hypothalamus produces Gonadotropin releasing hormone into bloodstream and binds to cell in anterior pituitary
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This produces two hormones
Follice stimulating hormone (FSH) and Luteinising hormone
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Stimulates sertoli cells-> inhibin-> sperm
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Luteinising hormone
Released all over body- reacts in both testes and ovaries- stimulates leydig cells-> testosterone
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By default the human body is
Female (XX)
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Androgen insensitivity syndrome
XY chromosomes but still a woman- no period but no receptors for testosterone
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Anabolic steroids
like testosterone- increase muscle mass
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Testosterone and inhibin go
All over the body- when recepted in the pituitary gland and hypothalamus inhibits gonadotropin secretion, FSH and LH
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Negative feedback
Regulates levels
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2 hormones produces in the posterior pituitary
Vaspressin (thirst)/ Oxytocin (labour, lactation but also NT in brain that creates trust)
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Blood sugar- non-hormonal signal controlled by
Insulin- low blood sugar= pancreas releases sugar/ high blood sugar= insulin released
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Neurogenesis- creation of neurones/ Reorganisation of cortex
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In adult mammals substantial neurogenesis is restricted to the
hippocampus and olfactory bulb
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How many neurones per hour are added to the hippocampus in humans?
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Increased with
Exercise, diet and chewing hard things
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Monkey's motor cortex
Trained an task that required use of digits- motor map representation expanded
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Can't make new neurones in motor cortex but
Number and strength of synapses change, more dendrites, more receptors, new blood vessels
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Professor P
Right side of face sagged, speech problems, balance problems, fatigue- started african drumming and got better! neurones rearranged
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Down syndrome is ...% genetic
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Other cards in this set

Card 2


Hormones produced in the


Hypothalamus (in the Diencephalon)

Card 3


Hormones are chemical messengers that are secreted by a


Preview of the front of card 3

Card 4


They are secreted into


Preview of the front of card 4

Card 5


Things can be both hormones and neurotransmitters and do different things


Preview of the front of card 5
View more cards


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