Animal Form and Function study guide

Animal Form and Function study guide - Chapter46...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 46 Endocrine System Nervous system/ endocrine system Hormone Chemical signal secreted into body fluids (blood) communicating  regulatory messages  Target Cells Body cells that respond to hormones Endocrine system/glands Hormone secreted system/glands (ductless) Exocrine glands Secrete chemicals (sweat, mucus and enzymes) through ducts Overlap                                      Neurosecretory cells Actual nerve cells that secrete “neuro” hormones Epinephrine- fight or flight hormone and neurotransmitter made in adrenal  medulla Feedback mechanisms Negative and positive feedback Day/night cycles, reproductive cycles 3 parts of Chemical signaling Reception Transduction Response 3 hormonal control pathways Simple endocrine pathway Simple neurohormone path way Hypothalamus Positive feedback Simple neuroendocrine pathway Hypothalamus Mode of Action Chemical signaling Water soluble hormones Transport channel in plasma membrane reception  Signal-transduction pathways
Background image of page 1

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

View Full DocumentRight Arrow Icon
Neurotransmitters, growth factors, most hormones Fat soluble hormones Cell nucleus reception Steroid hormones, thyroid hormones, some local regulators Ex. Estrogen/progesterone Paracrine Signaling: local regulators Local regulators: chemical signals that transmit info to their target cells near  the secreting cells cell surface, internal receptors  Growth factors- proteins for cell proliferation/ differentiation Nitric Oxide(NO)- neurotransmitter  Cell destructions when secreted by White blood cell’s Viagra blocks no breakdown Prostaglandins- modified fatty acids secreted by placentas and immune system Inflammatory response Also found in semen  Helps sperm reach egg Cytokines Proteins in immune response Vertebrate Endocrine system Tropic hormones A hormone that has another endocrine gland as a target Hypothalamus- pituitary  Pituitary gland Pineal gland Thyroid gland Parathyroid gland Thymus Adrenal glands Pancreas Gonads Ovary, testis  The hypothalamus and pituitary Releasing and inhibiting hormones Anterior pituitary (adenohypophysis)  
Background image of page 2
Main player in hormones Holds the most Growth (GH) Ones Gigantism/dwarfism Acromegaly Prolactin(PRL) Mammary glands Milk production  Nontropic Follicle – stimulating (FSH) and LH Ovaries and testes  Ovaries= gonadotropic Thyroid Stimulating (TSH) Tropic thyroid  Adrenocorticotropic Near kidney Melanocyte Stimulates (MSH non tropic) Endorphins Natural “opiates”
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/31/2011 for the course BIO 102 taught by Professor Robinson during the Spring '09 term at UPenn.

Page1 / 20

Animal Form and Function study guide - Chapter46...

This preview shows document pages 1 - 4. Sign up to view the full document.

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