lecture11

lecture11 - lecture 11 - the pituitary the central nervous...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
lecture 11 - the pituitary •the central nervous system brings about many changes via regulation of hormone secretion. •adrenal medulla - rapid response to stress •pituitary - many different physiological functions (some rapid, other slow and sustained)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
hypothalamus pituitary ...first the hypothalamus •most important brain center for regulating homeostasis •only 1% of brain’s weight. About the size of an almond - composed of at least a dozen “nuclei” with distinct functions (examples: anterior hypothalamic nucleus - thermoregulation; lateral nucleus - thirst and hunger) •controls many aspects of physiology: •hunger •body temperature •thirst •osmolarity •reproduction •lactation •metabolic rate •circadian cycles •fatigue •anger •the hypothalamus receives multiple inputs: •photoperiod •olfactory •many neural inputs from heart, stomach, reproductive tract •hormones •output from the hypothalamus can be either hormonal or neural
Background image of page 2
•the pituitary sits right under the hypothalamus - connected by the infundibulum. two components to the pituitary: anterior - not neural tissue. Collection of endocrine cells that are regulated by the hypo- thalamus. posterior : and extension of the hypothalamus - contains terminals of neurosecretory neurons.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
the anterior pituitary arises from a pouch of tissue in the pharynx* *The digestive and respiratory tube share share a common chamber at the front end of the embryo. This is the pharynx . the posterior pituitary is an outgrowth from the floor of the diencephalon # # the diencephalon is the region of the brain that gives rise to the hypo- thalamus, thalamus, pineal gland and retina.
Background image of page 4
Anterior Pituitary •release of hormones by the anterior pituitary is under control of hormones released by neurosecretory cells in the hypothalamus. •these hormones from the
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/14/2011 for the course MCDB 111 taught by Professor Smith during the Spring '11 term at UCSB.

Page1 / 12

lecture11 - lecture 11 - the pituitary the central nervous...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online