TUTTEE ACADEMY LOGO
broken image
  • Home
  • About Us
  • Subjects 
    • CHEMISTRY
    • BIOLOGY
    • PHYSICS
    • MATHEMATICS
    • PSYCHOLOGY
    • ECONOMICS
    • BUSINESS
    • COMPUTER SCIENCE
    • CHINESE
    • ENGLISH
    • SPANISH
    • IBDP IA / EE
    • IBDP TOK
    • ONLINE TUTORIAL
  • Exam Boards 
    • IBDP
    • IBMYP
    • IGCSE & GCSE
    • HKDSE
    • GCE A-LEVELS
  • Courses 
    • IBDP Tuition
    • GCE A-Level Tuition
    • IBMYP Tuition
    • I/GCSE Tuition
    • HKDSE Tuition
  • Admission Test Prep 
    • PREDICTED GRADE
    • SAT / SSAT
    • UKISET (UK)
    • BMAT
    • UKCAT / UCAT
    • LNAT
    • TMUA (Cambridge)
  • Student Results 
    • IBDP STUDENT RESULTS
    • IGCSE & GCSE MATHEMATICS
    • A-LEVEL STUDENT RESULTS
    • IGCSE STUDENT RESULTS
    • GCSE STUDENT RESULTS (UK)
    • HKDSE STUDENT RESULTS
    • OUR STORIES
  • Question Bank
  • Resources
SCHEDULE A LESSON NOW

IBDP Biology- Hormones around the body

Topic 6- Different hormones facilitated around the body

· IBDP BIOLOGY,IB,Hormones

In IBDP Biology, we may need to be aware of even more different types of hormones that is around the body, for example growth hormones or ADH, let's go!

Growth Hormone 

broken image

GH (aka somatotropin) a protein that stimulates cells to enlarge and divide faster

  • enhanced the movement of amino acids through cell membranes and increase rate of protein synthesis
  • decreases the rate at which cells use carbohydrates and increase the rate at which they use fats
  • peaked secretion at night
  • hypothalamus secretes GHRH stimulates GH secreting

Prolactin 

  • It is a protein and promotes milk production
  • High levels of it can disrupt sexual functions
  • Prolactin secretion is mostly under inhibitory control by dopamine from the hypothalamus (aka prolactin release inhibiting hormone)
  • hypothalamus likely releases more than one prolactin-releasing factor (PRF) 

Oxytocin 

broken image
  • Causes or strengthen labour contractions during childbirth
  • positive feedback example
  • controls bleeding after childbirth
  • can be used to induce abortion
  • also helps with lactation 

ADH  

broken image
  • small peptide molecule made in hypothalamus released by pituitary gland 
  • prevents production of dilute urine; it causes more permeable membrane to soak up more water
  • can stimulate contraction of arteries and capillaries

Types of Hormones 

Steroid Hormones

  • can freely diffuse across the plasma membrane of cell
  • bind to receptor in cytoplasm or nucleus of target cell to make active receptor-hormone complex which move into the nucleus and bind directly to DNA, acts as a transcription for gene expression

Peptide Hormones

  • hydrophylic and lipophobic meaning they cant freely cross the plasma membrane
  • bind to receptors on surface of cell which typically have internally anchored proteins
  • receptor complex activates a series of intracellular molecules which initiate cell activiy 
  • process called signal transduction 
  • IE: insulin, glucagon, leptin, ADH, oxytocin  

That is all !

broken image

CLICK HERE TO LEARN MORE ABOUT OUR IBDP BIOLOGY COURSES

SIGNUP FOR IBDP BIOLOGY TRIAL NOW

References:

  • https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.osmosis.org%2Flearn%2FGrowth_hormone_and_somatostatin&psig=AOvVaw2TSWSNdxDDmWeneHjA-Iv5&ust=1626351290181000&source=images&cd=vfe&ved=0CAoQjRxqFwoTCJD7he_E4vECFQAAAAAdAAAAABAR
  • https://www.google.com/url?sa=i&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FOxytocin&psig=AOvVaw0Mayiic-O3d9ojHZTs30jO&ust=1626354142868000&source=images&cd=vfe&ved=0CAoQjRxqFwoTCNDbjbrP4vECFQAAAAAdAAAAABAD
  • https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.dreamstime.com%2Fillustration%2Fantidiuretic-hormone.html&psig=AOvVaw3keZaahI3ZuNffNR4_KE0P&ust=1626354214089000&source=images&cd=vfe&ved=0CAoQjRxqFwoTCMCnxdzP4vECFQAAAAAdAAAAABAD

Drafted by Venetia (Biology)

Subscribe
Previous
AS/A-level Chemistry - Oxidation and Reduction
Next
IBDP Biology- Pumps and Endo/Exocytosis
 Return to site
Profile picture
Cancel
Cookie Use
We use cookies to improve browsing experience, security, and data collection. By accepting, you agree to the use of cookies for advertising and analytics. You can change your cookie settings at any time. Learn More
Accept all
Settings
Decline All
Cookie Settings
Necessary Cookies
These cookies enable core functionality such as security, network management, and accessibility. These cookies can’t be switched off.
Analytics Cookies
These cookies help us better understand how visitors interact with our website and help us discover errors.
Preferences Cookies
These cookies allow the website to remember choices you've made to provide enhanced functionality and personalization.
Save