Practice Corner MCQ

In most mammals, the testes are located in scrotal sac for

Temperature of the scrotum which is necessary for the functioning of testis is always around \(\qquad\) below body temperature.

The given figure shows a diagrammatic sketch of a portion of human male reproductive system. Identify the parts labelled as A, B, C and D and select the correct option.

The given diagram refers to T.S. of testis showing sectional view of a few seminiferous tubules. Identify the parts labelled A-D and select the correct option.

Which of the following is correct about mammalian testes?

The nutritive cells found in seminiferous tubules are

Sertoli cells are regulated by the pituitary hormone known as

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from

Read the following statements about the given diagram carefully and state which of them are correct?

(i) A carries urine and sperms.
(ii) B secretes a fluid that helps in the lubrication of penis.
(iii) D produces testosterone but not sperms.
(iv) C stores sperms.

The head of the epididymis at the head of the testis is called

The given diagram shows L.S. of testis showing various parts. Identify the parts labelled (A to G) from the list given below.

(i) Caput epididymis
(ii) Cauda epididymis
(iii) Vas deferens
(iv) Vasa efferentia
(v) Corpus epididymis
(vi) Seminiferous tubules
(vii) Tunica vaginalis
(viii) Tunica albuginea
(ix) Tunica vasculosa
(x) Rete testis

Given below are the three statements each with two blanks. Select the option which correctly fills up the blank in any two statements.
(A) Each seminiferous tubule is lined on its inside by two types of cells called (i) and (ii).
(B) The seminiferous tubules open into the (i) through (ii).
(C) The enlarged end of penis called the (i) is covered by a loose fold of skin called the (ii).

Seminal plasma in humans is rich in

A sex gland which secretes fructose that provides energy to spermatozoa for swimming and prostaglandins that stimulate uterine contractions to aid sperm-ovum interaction is

Prostate glands are located below

The function of the secretion of prostate gland is to

Match each function below with the associated part or parts of the human male reproductive system shown in the figure.

(i) Produces sperm
(ii) Conducts the sperm through the penis to the outside of the body
(iii) Produces seminal fluid
(iv) Connects the epididymis with the urethra

Identify the parts labelled as A to F from the given diagram of human female reproductive system and select the correct option.

Fill up the blanks in the following paragraph by selecting the correct option. 

(i) are the primary female sex organs that produce (ii)  and (iii)
Each primary sex organ is about (iv) in length and is connected to the pelvic wall and uterus by \(\qquad\) (v)

The given figure depicts a diagrammatic sectional view of the human female reproductive system. Which set of three parts out of I-VI have been correctly identified?

The given figure shows female reproductive system. Which wall of the uterus ( \(\mathrm{A}, \mathrm{B}\) or C ) sloughs off during menstruation? 

Lower narrow end of uterus is called

The female external genitalia include
(i) ovary
(ii) mammary gland
(iii) mons pubis
(iv) clitoris
(v) labia majora

Bartholin’s gland are situated

A sectional view of mammary gland shows
(i) nipple + areola
(ii) mammary lobe, alveolus and duct
(iii) antibodies + pectoralis major muscles + ribs
(iv) ampulla + lactiferous duct

Milk secreted from the cells of alveoli of mammary lobes reaches nipple through lactiferous duct (L), mammary duct (M), mammary tubule (T) and mammary ampulla
(A) in the following order

In humans, at the end of the first meiotic division, the male germ cells differentiate into the

\(2 n=16\) is in a primary spermatocyte which is in metaphase of first meiotic division. What shall be the total number of chromatids in each of the secondary spermatocyte?

How many sperms are formed from a secondary spermatocyte?

How many sperms are formed from four primary spermatocytes?

\(
\text { What does the given figure represent? }
\)

In spermatogenesis, the phase of maturation involves

In spermatogenesis, reduction division of chromosome occurs during conversion of

Which of the following groups of cells in the male gonad, represent haploid cells?

Consider the following statements each with two blanks.
(A) Seminiferous tubules produce (i) while Leydig’s cells produce (ii).
(B) In females, urethra is small and conducts
(iii) while in males it conducts urine and (iv).
(C) The process of formation of spermatozoa from spermatogonia is called (v) and the process of maturation of spermatids into spermatozoa is called (vi).

Which one of the following options, gives the correct fill ups for the respective blank numbers from (i) to (vi) in the statements?

The process of release of spermatozoa from Sertoli cells into cavity of the seminiferous tubules is called

In oogenesis, the secondary follicle soon transforms into a tertiary follicle which is characterised by a fluid filled cavity called

Given below is an incomplete flow chart showing influence of hormones on gametogenesis in males. Observe the flow chart carefully and identify \(\mathrm{A}, \mathrm{B}\) and C .

Spermatogenesis is induced by

The given table shows differences between spermatogenesis and spermiogenesis. Select the incorrect option.

\(
\begin{aligned}
&\text { (a) }\\
&\begin{array}{|l|l|}
\hline \text { Spermatogenesis } & \text { Spermiogenesis } \\
\hline \begin{array}{l}
\text { Process of formation } \\
\text { of spermatozoa. }
\end{array} & \begin{array}{l}
\text { Process of differen- } \\
\text { tiation of spermatozoon } \\
\text { from a spermatid. }
\end{array} \\
\hline \begin{array}{l}
\text { It changes a haploid } \\
\text { structure into another } \\
\text { haploid structure. }
\end{array} & \begin{array}{l}
\text { It involves conversion of } \\
\text { a diploid structure into } \\
\text { haploid structure. }
\end{array} \\
\hline \begin{array}{l}
\text { Growth and division } \\
\text { occur. }
\end{array} & \begin{array}{l}
\text { Division and growth are } \\
\text { absent. }
\end{array} \\
\hline \begin{array}{l}
\text { A spermatogonium } \\
\text { forms four } \\
\text { spermatozoa. }
\end{array} & \begin{array}{l}
\text { A spermatid forms a } \\
\text { single spermatozoon. }
\end{array} \\
\hline
\end{array}
\end{aligned}
\)

Identify the parts labelled as A, B, C, D and E in the given diagram of a human sperm and select the correct option.

The middle piece of the sperm contains

Consider the following three statements related to the human male reproductive system and select the correct option stating which ones are true ( T ) and which ones are false (F).
(i) Middle piece of spermatozoon is also termed as power house of spermatozoon.
(ii) Vas deferens joins a duct from seminal vesicle to form vasa efferentia.
(iii) Semen is a collection of secretions from the seminal vesicles, prostate gland and Cowper’s glands to sperms from testes.

The principal tail piece of human sperm shows the microtubular arrangement of

A cross section at the midpoint of the middle piece of a human sperm will show

Acrosome is a type of

Which of the following contains the actual genetic part of a sperm?

The sperms undergo physiological maturation, acquiring increased motility and fertilising capacity in

At what stage of life is oogenesis initiated in a human female?

Total number of follicles in each ovary of a normal young adult woman is about 60,000 to 80,000 . But only 500 follicle get a chance to mature. What is the destiny of rest of the eggs?

\(1^{\text {st }}\) polar body is formed at which stage of oogenesis?

In the given T.S. of human ovary identify A to F and select the correct option.

In ovary we can find
(i) primary follicle
(ii) Graafian follicle
(iii) blood vessel
(iv) corpus luteum

Which one is released from the ovary?

In oogenesis, a diploid cell produce \(\qquad\) ovum/ova.

During oogenesis, each diploid cell produces

In oogenesis haploid egg is fertilised by sperm at which stage?

Read the given statements and select the correct option.
Statement 1 : In a Graafian follicle, the primary oocyte and the follicle cells may be regarded sibling cells.
Statement 2 : Both arise from the same parent cell, the oogonium, by mitotic divisions.

Layers of an ovum from outside to inside is

Given here is the figure of a section of Graafian follicle. Identify the labelled parts A to E and select the correct option.

Which part of ovary in mammals acts as an endocrine gland after ovulation?

Pick the odd one out from each series given below and select the correct option.
(i) Scrotum, Rete testis, Fallopian tube, Vas deferens
(ii) Ovary, Uterus, Vagina, Ejaculatory duct
(iii) Acrosome, Graafian follicle, Corpus luteum, Cervix
(iv) Prostate, Testis, Seminal vesicles, Cowper’s gland

Mark the odd item in each series and select the correct option.
(i) Spermatocyte; Polar body; Spermatid; spermatogonium
(ii) Endometrium; Corpus luteum; Acrosome; Graafian follicle
(iii) Vas deferens; Fallopian tube; Epididymis; Cowper’s gland
(iv) Sertoli cells, Spermatozoa, Interstitial cells, Cowper’s gland

Match column I with column II and select the correct option from the codes given below.

\(
\begin{array}{|c|l|c|l|}
\hline & \text { Column I } & & \text { Column II } \\
\hline \text { A. } & \text { Acrosome } & \text { (i) } & \text { Rudimentary erectile tissue } \\
\hline \text { B. } & \text { Endometrium } & \text { (ii) } & \text { Uterus } \\
\hline \text { C. } & \text { Polar body } & \text { (iii) } & \text { Oogenesis } \\
\hline \text { D. } & \text { Clitoris } & \text { (iv) } & \text { Spermatozoon } \\
\hline
\end{array}
\)

\(
\text { Select the correct match. }
\)

Given below is an incomplete flow chart showing influence of hormones on gametogenesis in human females. Study it carefully and identify A, B, C and D.

The following graph shows the levels of pituitary hormones during a menstrual cycle. What do 1 and 2 represent?

The following graph shows the levels of ovarian hormones during a menstrual cycle. What do 1 and 2 represent?

The accompanying diagram shows the changes that take place in the endometrium during a normal menstrual cycle. Identify the changes and select the correct option.

The phase of menstrual cycle in humans that last for \(7-8\) days, is

During proliferative phase,

Proliferation of endometrium during follicular phase is undertaken by

In the 28 days human ovarian cycle, the ovulation takes place typically on

The time for optimum chances of conception in a woman is \(\qquad\) starting from the day of menstruation.

Ovulation in the human female normally takes place during the menstrual cycle

After ovulation, Graafian follicle regresses into

Immediately after ovulation, the mammalian egg is covered by a membrane known as

Below is given the unorganised list of some important events in the human female reproductive cycle. Identify the correct sequence of these events and select the correct option.
(i) Secretion of FSH
(ii) Growth of corpus luteum
(iii) Growth of the follicle
(iv) Ovulation
(v) Sudden increase in the levels of LH

Which one of the following is the correct matching of the events occurring during menstrual cycle?

Which one of the following events is correctly matched with the time period in a normal menstrual cycle?

A regular cycling woman is not menstruating. Which one of the following is the most likely root cause of this?

Read the following statements about menstrual cycle and select two correct statements.
(i) Lack of menstruation may be indicative of pregnancy.
(ii) The changes in the ovary and the uterus are induced by changes in the levels of ovarian hormones only.
(iii) LH surge induces ovulation.
(iv) If fertilisation occurs, corpus luteum degenerates immediately.

If mammalian ovum fails to get fertilised, which one of the following is unlikely?

During bleeding phase of menstrual cycle unfertilised secondary oocyte undergoes autolysis. The interplay of hormones then is

A human female reaches menopause around the age of

Cessation of menstrual cycle in a woman is called

Name the hormone that has no role in menstruation.

Study the graph carefully and correlate the hormone levels on

(i) 1-5 days
(ii) 12-14 days
(iii) 25-28 days (if the ovum is not fertilised).

The given figure shows schematic representation of a menstrual cycle in human female. Identify the three phases ( A, B and C ) of menstrual cycle.

Some important events that occur during the menstrual cycle are given below. Arrange the events in a proper sequence and select the correct option.
(i) Proliferation of endometrial wall
(ii) LH surge
(iii) Secretion of estrogen
(iv) Secretion of progesterone
(v) Ovulation
(vi) Growth of corpus luteum
(vii) Degeneration of corpus luteum
(viii) Menstruation

Withdrawal of which of the following hormones is the immediate cause of menstruation?

For human female which of the following is incorrect?

At menopause there is rise in urinary excretion of

Which of the following statements concerning menopause is correct?

Fertilisation is defined as the process by which

A reaction of granules content which harden the zona pellucida and ensures sure block to polyspermy is

Fill up the blanks in the following paragraph by selecting the correct option.
During copulation (coitus), semen is released by the penis into the vagina and is called (i). The ovum released by the ovary is transported to the (ii) where (iii) takes place. During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of (iv). The secretions of the (v) help the sperm enter into the cytoplasm of the ovum.

Which part of the sperm plays an important role in penetrating the egg membrane?

The second maturation division of the mammalian ovum occurs

In oocyte secondary maturation occurs in

Besides activating the egg, another role of a sperm is to carry egg to

The sperm and the egg make different contributions to zygote. Which of the following statements about thei contributions are true?
(i) Sperm contributes most of the mitochondria.
(ii) Egg contributes most of the cytoplasm.
(iii) Both sperm and egg contribute haploid nucleus.
(iv) Both sperm and egg contribute centrioles.

Some important events that take place during fertilisatior are given below. Arrange the events in a proper sequence and select the correct option.
(i) Cortical reaction

(ii) Sperm entry

(iii) Karyogamy

(iv) Acrosomal reaction

Preparation of sperm before penetration of ovum is

The sex of the fetus will be decided at

What is true about cleavage in the fertilised egg in humans?

Cleavage differs from mitosis in lacking

The solid mass of 8-16 cells formed from zygote after successive mitotic divisions is called

Given below are four statements (i)-(iv) regarding embryonic development in humans.
(i) Cleavage divisions bring about considerable increase in the mass of protoplasm.
(ii) With more cleavage divisions, the resultant blastomeres become smaller and smaller.
(iii) The blastomeres in the blastocyst are arranged into two layers, trophoblast and endometrium.
(iv) Cleavage divisions result in a solid ball of cells called morula.

Which of the above two statements are correct?

Identify the human developmental stage shown as well as the related right place of its occurrence in a normal pregnant woman and select the right option for the two, together.

Read the given statements and select the correct option.

Statement 1 : Upto morula stage, the cells divide without any increase in size.
Statement 2 : Cell division convert unicellular zygote into a multicellular embryo.

Match column I with column II and select the correct option from the codes given below.
\(
\begin{array}{|c|l|c|l|}
\hline & \text { Column I } & & \text { Column II } \\
\hline \text { A. } & \text { Cleavage } & \text { (i) } & \text { Fertilisation } \\
\hline \text { B. } & \text { Morula } & \text { (ii) } & \text { Mitotic divisions } \\
\hline \text { C. } & \text { Polyspermy } & \text { (iii) } & \text { Endometrial } \\
\hline \text { D. } & \text { Implantation } & \text { (iv) } & \text { Little mulberry } \\
\hline
\end{array}
\)

Implantation takes place after \(\qquad\) of fertilisation.