Tag: human physiology

Questions Related to human physiology

The secretion of progesterone by corpus luteum is initiated by

female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

  1. FSH

  2. LH

  3. MSH

  4. Thyroxine

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Correct Option: B
Explanation:

The luteal phase is marked by the increased concentration of the luteinizing hormone. The LH stimulates the corpus luteum to secrete progesterone which helps in the maintenance of the pregnancy by increasing the thickening of the cell lining of the endometrial wall. 

Thus, the correct answer is option B. 

An unfertilized human egg would have

female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

  1. Two X - chromosome

  2. One X - chromosome

  3. One Y - chromosome

  4. Both X and Y - chromosome

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Correct Option: B
Explanation:

The gametes are the haploid cells which are produced by the meiotic division. The egg is the female gamete which is produced through oogenesis. The gametes are haploid and contain only one set of the chromosome. So, the egg cell contains the 22 autosomes and one X chromosome. Since the female somatic cell contains two X chromosome, there will be only one X chromosome in the gamete.

Thus, the correct answer is option B. 

The correct set of a single endocrine gland hormone is

female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

  1. Oxytocin, prolactin, ACTH

  2. Oxytocin, vasopressin, ADH

  3. Thyroxin, secretin, ACTH

  4. Epinephrin, cortisol, ICSH

Show answer
Correct Option: B
Explanation:

Oxytocin and ADH is secreted from posterior pituitary, vasopressin is another name of ADH.

In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was

female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

  1. High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo.

  2. High level of circulating hCG to stimulate endometrial thickening.

  3. High level of FSH and LH in uterus to stimulate endometrial thickening.

  4. High level of circulating hCG to stimulate estrogen and progesterone synthesis.

Show answer
Correct Option: B,D
Explanation:

After implantation of blastocyst (pregnancy), the placenta produces the hormone hCG (human chorionic gonadotropin) hCG promotes the maintenance of the corpus luteum to secrete the hormone progesterone and estrogen. High levels of hCG stimulates endometrial thickening also.

Some important events in the human female reproductive cycle are given below. Arrange the events in a proper sequence.
A : Secretion of FSH
B : Growth of corpus luteum
C : Growth of the follicle and oogenesis
D : Ovulation 
E : Sudden increase in the levels of LH

female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

  1. $C\rightarrow A\rightarrow D\rightarrow B \rightarrow E$

  2. $A\rightarrow C\rightarrow E\rightarrow D \rightarrow B$

  3. $A\rightarrow D\rightarrow C\rightarrow E \rightarrow B$

  4. $B\rightarrow A\rightarrow C\rightarrow D \rightarrow E$

Show answer
Correct Option: B

A female gland corresponding to prostate gland of males is

female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

  1. Bartholin's gland

  2. Bulbourethral gland

  3. Clitoris

  4. None of the above

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Correct Option: D

Progesterone is secreted by

female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

  1. Corpus luteum

  2. Corpus albicans

  3. Leyding cells

  4. Graafian cells

Show answer
Correct Option: A
Explanation:

Progesterone is secreted by the corpus luteum for maintenance of the endometrial lining. Corpus luteum is formed from the remains of the matured Graafian follicle.

So the correct answer is A.

Which one of the following is the most likely root cause why

menstruation is not taking place in regularly cycling human female ?

female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

  1. Retention of well-developed corpus luteum

  2. Fertilization of the ovum

  3. Maintenance of the hypertrophical endometrial lining

  4. Maintenance of high concentration of sex-hormones in the blood stream

Show answer
Correct Option: B

Accessory glands associated with genital organs of female are
(a) Vestibular or Bartholin's
(b) Cowper's
(c) Ampullary
(d) Vesicular

female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

  1. a, b

  2. a only

  3. b, c

  4. d only

  5. c only

Show answer
Correct Option: B
Explanation:

The female external genitalia contains vulva, Bartholin's gland, and clitoris. Further vulva contains mons pubis, labia majora, and labia minora. Bartholin's gland help in lubrication of vagina and clitoris is a tiny finger-like structure which helps in stimulation.

So, the correct option is 'a only'.

Which group represents external genitalia of human female?

female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

  1. Labium minora, labium majora, vagina

  2. Labium minora, labium majora, oviduct

  3. Labium minora, labium majora, cervix

  4. Labium minora, labium majora, clitoris

Show answer
Correct Option: D
Explanation:

The external genitalia of human female consists of:

Mons pubis - It is the anterior most part and is covered with pubic hair and skin. 
Clitoris - Present posterior to mons pubis and is homologous to the glans penis as it contains the erectile tissues. 
Labium majora - Large fleshly folding and is covered with sebaceous glands. It is considered to be homologous to scrotum. 
Labium minora - Small fleshly folding which are homologous to penile urethra.
Thus, the correct answer is 'Labium minora, labium majora, clitoris'.