BIO310H5 Lecture Notes - Lecture 8: Hydrophile, Cyclic Nucleotide, Melatonin

30 views5 pages
25 Mar 2020
School
Department
Course

Document Summary

Case study: boy diagnosed with a growth hormone deficiency which acts on the pituitary gland. Chemical signals act over short and long distances within the body: there are some neurons that secrete hormones neurosecretory or neuroendocrine. Instead of a postsynaptic neuron there"s a blood vessel. Local paracrine and autocrine: secretes substances (can"t call them hormones because there is no bloodstream) Hormones: first messengers from the endocrine gland, through the bloodstream, and whenever they reach the receptors, bind to the receptors, and activate the receptors the activation of the second messengers (activation inside the cell) Catecholamines are derived from tyrosine (norepinephrine, epinephrine and dopamine). If norepinephrine is released from neurons and acts on another neuron or effector organ it is considered a neurotransmitter. However, when norepinephrine is released from an endocrine gland (such as the adrenal medulla) and secreted into the blood stream and acts on its receptor it"s considered to be a hormone.

Get access

Grade+
$40 USD/m
Billed monthly
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
10 Verified Answers
Class+
$30 USD/m
Billed monthly
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
7 Verified Answers

Related textbook solutions

Related Documents

Related Questions