BT_PO 1.86 Describe the role of the hypothalamus in the integration of neuro-humoral responses

T/F   osmoreceptors are located in the hypothalamus – when osmolality increass, ADH is released from the posterior pituitary

T/F   the hypothalamus can suppress appetite via the satiety centre, by sensing blood glucose levels

T/F    the posterior hypothalamus contributes to the control of the sympathetic nervous system

T/F   the hypothalamus integrates body temperature regulation – responses to a fall in body temperature are triggered by the anterior hypothalamus

T/F  fever occurs when pyrogenic cytokines alter the “set point” of the hypothalamus to higher than 37 degrees

T/F  the hypothalamus secretes thyroid stimulating hormone (TSH) which stimulates T3 and T4 release from the thyroid gland

References

  1. Kam & Power 3rd edition, page 66-67
  2. Ganong 24th edition, chapter 17

BT_PO 1.51 Autonomic nervous system

PA051746.jpg

Art by Bruce Nauman viewed at the Tate Modern.

Let’s focus on the physiology of the first of those statements today….

BT_PO 1.51 Describe the autonomic nervous system and its physiological roles including:

· Autonomic receptors and cellular effects of receptor activation

· Autonomic transmitters, their synthesis, release and fate

Acetylcholine is essential for the normal function of the sympathetic nervous system  TRUE/FALSE

Most blood vessels have only sympathetic innervation TRUE/FALSE

Noradrenaline has a longer half life than acetylcholine   TRUE/FALSE

The sympathetic nervous system incorporates a negative feedback loop, via presynaptic α2 receptors  TRUE/FALSE

The heart receives input from T1-6 sympathetic fibres  TRUE/FALSE

and one extra one for those of you hoping for something related to the second statement…

Both an intact parasympathetic and sympathetic nervous system are required for normal male sexual function    TRUE/FALSE