The menstrual cycle
The Stages In The Menstrual Cycle:
- The pituitary gland releases FSH when the ovaries make an egg.
- FSH matures the egg and also triggers the release of Oestrogen.
- Oestrogen slows FSH and starts LH.
- It also repairs uterus lining.
- LH causes ovulation and starts Progesterone.
- Progesterone slows down LH prepares the uterus lining for the egg.
- The levels of Progesterone and Ostrogen fall, causing menstruation.
The kidney removes poisonous Urea out of the blood.
The kidney also controls the amount of Salt & Water in the blood too.
Urea = Amino Acids broken down in Liver into Ammonia. Ammonia then turns into Urea.
How the Kidney works?
- Blood is pumped into kedney through the Renal Artery under HIGH pressure.
- Blood enetrs each Glumerulus under HIGH pressure.
- Most SMALL molecules in the blood move throught the Glumerulus membrane, into the Bowman's Capsule.
- These small molecules are: Urea, Water, Salt, Amin Acids & Glucose
- Useful materials such as: Glucose, some Water & some Salts go in to the kidney tubeles
- In the Proximal (1st Coiled Tubule), Glucose & Salt are reabsorbed by Active Transport.
- In the Loop of Henle: Descending: water passively diffuses out of the naphrons.
- : Ascending: salt passively diffuses out
- In the Distal (2nd Coiled Tubule), Water is reabsorbed in into the blood under the interference of ADH.
Minerals In Plants
The 4 Compounds Needed Are:
Nitrates: needed to make Protein: which is needed for growth
Phosphates: needed for Respiration & Growth
Potassium: needed for Respiration & Photosynthesis
Magnesium: needed for Photosynthesis
They Are Used To:
Nitrates: needed for Amino Acids which then make protiens
Phosphurous: needed for DNA development in the plant
Potassium: needed to help Enzyme Activity
Magnesium: needed to make Chlorophyll for Photosynthesis