sex steroids Flashcards
What is the normal range of testosterone in males?
265-953 ng/dL
What is the normal range of testosterone in females?
15-70 ng/dL
What is the normal range of oestrogen (oestradiol) in females?
3-40 ng/dL
What is the normal range of progesterone in females?
100-2500 ng/dL
Which hormone controls testosterone secretion in males?
LH
Which hormone controls sperm production in males?
FSH
What roles does testosterone play in males?
Regulates male characteristics, sexual behaviour, libido, spermatogenesis, muscle mass, and bone strength.
What roles does testosterone play in females?
Regulates ovarian function, precursor of oestrogen, sexual behaviour, libido, and contributes to bone strength.
What is another name for testosterone?
An anabolic steroid
What is the role of oestrogen in males?
Regulates environment in semen for normal sperm function; too low or too high levels lead to infertility.
What is the role of oestrogen in females?
Stimulates growth of the endometrial lining, regulates ovulation, and growth of breast tissue.
Which other systems does oestrogen affect?
Mineral deposition in bone; cardiovascular system.
What influence does progesterone have in males?
Influences sperm production and fertility.
What is a potential role of progesterone in the CNS?
Precursor for neurosteroids that regulate sleep and mood.
What roles does progesterone play in females?
Regulates secretions from the endometrial lining, maintains thickened endometrium, and promotes breast tissue growth.
Fill in the blank: In females, progesterone regulates ________ from the endometrial lining.
secretions
True or False: Oestrogen levels in males are higher in blood than in semen.
False
What can result from excessive oestrogen in males?
Gynaecomastia
