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Day 14
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What day does LH reach its peak concentration?
Day 14
How does the space shuttle launch from earth?
The Shuttles, like most launch vehicles, are essentially controlled explosions, using directed energy from volatile chemical combustion to propel them into space. The Shuttles use 2 external, reusable, Solid Fuel Rocket Boosters (SRB's) which are attached to an external fuel tank which contains separate internal tanks of Liquid Oxygen and Liquid Hydrogen, as well as other rocket propellants. The SRB's separate from the external tank, deploy parachutes when clear, and are recovered in the ocean by 2 specially designed recovery vessels. The Lox/LH fuel is what the Shuttle Main Engines use for fuel during launch; along with the thrust from the SRB's, it's enough to propel it into orbit, and pretty fast too. Watching a Shuttle launch on TV is deceiving, since NASA's long-range cameras keep the Shuttle in view for a lot longer than the visible eye can see it from Kennedy Space Center. Seeing a launch from KSC, the Shuttle is out of view within less than 90 seconds, even at night. The launch facility is pretty interesting; the Shuttles are moved from the Vertical Assembly Building (VAB), originally built to assemble the Saturn V Moon rockets, on a huge crawler that serves as its launch platform, out to one of 2 main pads at KSC, Pad 39A or 39B. There is a huge concrete engine blast redirection/water muffler system in place below where the Shuttle sits; just prior to Main Engine/SRB ignition, water from a huge tank is dumped into the area just below the Shuttle to muffle the noise from the engines and SRB's. The white cloud seen at launch isn't from the engines or SRB's; it's from the water being turned to steam. Without the water system, the launch noise would be much louder than it is already. There is also an Astronaut Emergency Egress System in place on the service gantry, which is a long cable slide system that takes them to an Armored Personnel Carrier located on the ground a few hundred yards away. It's more psychological than practical though. What most people don't know also is that the entire service gantry that fuels and provides service access to the Shuttle must be completely repainted after each launch, since the heat from the engines SRB's burns off most of the paint, and blackens the rest that isn't.
What day does LH reach its peak concentration?
Day 14
On which day is the level of LH in the bloodstream at its highest What event occurs immediately after this peak?
On the thirteenth day the level of LH is at its peak, but im not sure what happens after this. Hope this helps.
Is it possible to ovulate 24 hours after detecting a surge in LH?
OK, first a bit of background on LH (luteinizing hormone). This is released in two parts of your cycle, right at the beginning to mature an egg and in the middle of the cycle to cause ovulation. According to my notes, ovulation occurs approx. 34-36 hours after the onset of the LH surger or 10-12 hours after the LH peak. I do not know the specifics of your test, but if it tests for a peak LH level, then the egg will be released 10-12 hours after the peak. If it just detects a rise in LH, then it will be approx a day and a half later. Hope that helps. Student Doctor.
What hormone is at its peak during ovulation?
That is LH Luteinising hormone.
Ovulation is induced only when there is a peak in secretion of which hormone?
correct answer is LH
During the menstrual cycle LH and FSH peak causing?
Follicle to release a mature egg
A sudden surge in lh concentration causes?
a surge of testosterone in males and it causes ovulation in females.
What regulates estrogen and progesterone?
LH ( luteinising hormone) is stimulated by oestrogen and secreted by the pituitary gland. As oestrogen levels rise it will inhibit the production of FSH (follicle stimulating hormone) and will encourage the production of LH. As LH rises to a peak in the middle of the menstrual cycle, they will stimulate the release of a mature egg.
Which hormone stimulates the corpus luteum to produce progesterone and estrogen?
Luteinizing Hormone (LH)
Ask us anythingThe hormone levels during the menstrual cycle are shown below. What would happen if the hormone levels did not have their peak just before day 14?
fsh lh e p
Why do estrogen in high dose cause LH serge?
It is actually the serge in LH that causes estrogen to be prduced in high dosages. The reason behind this is as there is an increase in estrogen, the uterine lining becomes filled with blood and thickens in preparation for implantation. At the same time, the surge in LH makes the cervical mucus thinner so that the sperm can reach the egg in order to fertilize it.
What causes the peak in luteinizing hormone?
In the beginning of the menstrual cycle, LH and FSH stimulate the ovaries to make estrogen. During this time, there is a negative feedback loop, so levels of all three hormones are rather low. Eventually, as the estrogen levels slowly creep up, there comes a time when it switches from negative feedback to positive feedback (not exactly sure what the biochemical basis of this is), and LH and FSH levels skyrocket (estrogen levels go up to, but not as sharply, and there is always more LH than FSH). The LH surge causes ovulaton. The corpus luteum starts secreting progesterone, which inhibits LH and FSH secretion in a negative feedback manner, and so FSH and LH levels drop sharply.
