Advertisements
Advertisements
Question
What is menstrual cycle?
Advertisements
Solution
The menstrual cycle is the cyclic change of the reproductive tract of a primate female. This period is marked by a characteristic event repeated almost every month (28 days with minor variation) in the form of a menstrual flow (i.e., shedding of the endometrium of the uterus with bleeding). Only during pregnancy does it temporarily cease.
APPEARS IN
RELATED QUESTIONS
Describe the role of pituitary and ovarian hormones during the menstrual cycle in a human female.
Give a significant point of difference between the oestrous and menstrual cycles.
Explain menstrual cycle in human females.
Draw a neat and well-labeled diagram showing T.S. of the ovary and describe the menstrual cycle in human females.
Explain the role of hormones during the menstrual cycle.
Explain the menstruation phases in the menstrual cycle of a human female.
Give Reasons
Missing of menses is the first indication of pregnancy.
Name the Following
The onset of menstruation in a young girl at about the age of 13 years.
Name the Following
Sloughing of the uterine wall during menstrual flow.
Name the Following
The term used when females stop menstruation at the age of 45-50 years.
Complete the following sentences with appropriate word:
The human gestation period is about ____________.
Describe the phases of the menstrual cycle and their hormonal control.
The luteal phase of the menstrual cycle is also called the secretory phase. Give reason.
Find the wrongly matched pair.
The following is the illustration of the sequence of ovarian events (a-i) in a human female.
Name the ovarian hormone and the pituitary hormone that have caused the above-mentioned events.
The life of corpus luteum is generally about ______ days in the absence of pregnancy
Calculate the number of spermatozoa produced by a single primary spermatocyte.
When does the following step take place?
Identify the INCORRECT statement.
Immediately after ovulation, the mammalian egg is covered by a membrane known as ______.
A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.
| HORMONE A | HORMONE B | |
| Subject 1 | Shows a peak on the 14th Day of the menstrual cycle. | Falls down during the luteal phase. |
| Subject 2 | Shows a peak on the 14th Day of the menstrual cycle. | The level is maintained high in the luteal phase. |
If the peak of Hormone A does not appear in the study for Subject 1, which of the following statement is true?
In case the ova does not fertilize, which of the following events will take place?
Menstruation is triggered by an abrupt decline in the amount of ______.
Which of the following events is not associated with ovulation in human females?
Menstrual flow occurs due to lack of ______.
After ovulation the collapsed ovarian follicle shrinks and becomes filled with cell to form:
At which stage of the menstrual cycle, both LH and FSH are high?
What role does pituitary gonadotropins play during follicular and ovulatory phases of menstrual cycle? Explain the shifts in steroidal secretions.
The egg is passed down through the oviduct by muscular contractions.
Given below is a group of terms. In the group, one pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.
Follicular phase: 5-12 days:: Luteal phase : ______ days.
