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Hormones, Homeostasis and Reproduction - Coggle Diagram
Hormones, Homeostasis and Reproduction
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Feedback systems
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Negative:
- Too much of something, it shuts process
- Too low, speeds process
- Impulse causes reverse reaction
- Way to maintain homeostasis
- Most hormonal change happens in negative feedback
Positive:
- Amplify rather than diminish stimulus
- Accelerates everything until it colapses
Glands
Pituitary Gland (hyphophysis):
- In brain
- Chain of reactions
- Controls several other hormone glands
- Anterior and posterior
Pineal Gland:
- Produces melatonin (key role in sleeping)
- Body's response to sunlight
Thyroid gland:
- Produce thyroid hormone which affects metabolism
- Thyroid Hormones: T3, T4, Calcitonin
Pancreas
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-
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Islets contain:
- A cells (glucagon)
- B cells (insulin)
- D cells (somatostin)
- F cells(pancreatic polypepetide)
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Diabetes
Type 1:
- Developed in early years
- Beta cells destroyed
- Pancreas doesn't produce enough insulin
- Treatment include insulin injections
Type 2:
- Beta cells still produce insulin but body doesn't react to it
- Caused by lifestyle such as obesity
- Treatment includes regulation of lifestyle factors
Reproduction of males:
Vas defense: conduct sperm to Urethra
Urethra: Conduct sperm and urine to outside
Testes: produces sperm and testosterone
Scrotum: holds testes, regulates temperature
Bladder: holds urine
Seminal vesicle: produces secretions that form part of semen
Prostate gland: produces secretions that form part of semen
Epididymis: tube where sperm matures
Reproduction females:
Fallopian tube: Fallopian tube: conduct egg to uterus
Uterus: where fetus develops
Vagina: birth canal, receives penis during sex
Ovary: produces eggs and sex hormones
Cervix: entry to uterus. Muscle prevents fetus from being lost
Clitoris: source of pleasure
Menstrual Cycle:
- 28 day cycle
- follicular phase (FSH)
- Ovulatory phase
- Luteal phase
