Reproductive System Srijan Publications Solutions ICSE Class-10 Ch-13

Reproductive System Srijan Publications Solutions ICSE Class-10 Ch-13. We Provide Solutions of Very Short Answer Type, Short Answer Type, Long Answer Type Questions and MCQs of Exercise-13 Reproductive System Srijan Publications ICSE Class-10 Ch-13. Visit official Website CISCE  for detail information about ICSE Board Class-10.

Reproductive System Srijan Publications Solutions ICSE Class-10 Ch-13

Board ICSE
Publications Srijan Publications
Subject  Biology
Class 10th
Writer Veer Bala Rastogi
Chapter-13 Reproductive System
Topics Solutions of  MCQs, Very short and Short Long  Answers Questions
Edition for 2022-2023 Academic Session

A. VERY SHORT ANSWER TYPE QUESTIONS

Ch-13 Reproductive System Srijan Publications ICSE Class-10 Biology Solutions

(Page-201)

Questions 1. Give one word for the following.

(a) The structure in which testes are present in man–scrotum

(b) The canal through which testes descend into the scrotum just before the birth in human male.–inguinal canal

(c) The male reproductive cells in the humans—Sperm

(d) The site of production of sperm in man—seminiferous tubules

(e) Tube that leads from ovary to the uterus.— fallopian tubes

(f) The onset of menstruation in a young girl–Menarche

(g) Term used for mature follicle–Graafian follicle

(h) Condition when human female stops menstruation at the age of 40-50 years—Menopause

(i) Sloughing off the uterine wall during menstrual flow.–endometrium

(j) Hormones that influence reproductive function in males and in females.—estrogen, testosterone, and progesterone

(k) The mucous membrane lining the uterus.— the endometrium

(l) The period of complete intrauterine development of the embryo–Gestation period

(m) Nonidentical twins produced by the fertilization of two eggs.–Fraternal

(n) Membrane that protects the foetus and secretes a protective fluid.–amniotic fluid

Questions 2. State whether the following statements are true or false If false, rewrite the correct form of statements.

(a) Testes produce testosterone hormone.–True

(b) Testosterone is an androgen.–True

(c) The narrow part of uterus is called vulva–False

correct–The narrow part of uterus is called Cervix

(d) Clitoris is equivalent to the penis of male –True

(e) In mammals, the opening of fallopian tube has fimbricated margin.–True

(f) Vagina is lined by ciliated epithelium. False

correct–stratified squamous epithelium

(g) In a sexually mature human female, one ovum is released from each ovary every month. False

correct- one ovum is released from one ovary every month

(h) The release of ovum by bursting of a Graafian follicle is called oogenesis-False

correct- The release of ovum by bursting of a Graafian follicle is called ovulation

(i) Process of fusion of sperm nucleus and egg nucleus is called implantation.–False

correct–Process of fusion of sperm nucleus and egg nucleus is called fertilization

(j) Fertilization of ovum occurs in vagina. False

correct–Fertilization of an egg by a sperm normally occurs in the fallopian tubes

Questions 3. Choose the odd one in each of the following sets.

(a) Corpus luteum, antrum, follicle, Sertoli cells

(b) Oestrogen, progesterone, testosterone, prolactin

(c) Ovary, fallopian tube, ureter, uterus

Questions 4. Complete the following statements by choosing the correct alternative from those given in the brackets.

(a) Sertoli cells give nourishment to …..sperm…. (sperm/ova/foetus)

(b) The …epididymis….. mstores sperm (epididymis/vas deferens/seminal vesicle)

(c) One Graafian follicle matures every ..13th day…. (13th day/14th day /28th day)

(d) The site of fertilization in human female is ..oviduct.. (Vagina/oviduct/uterus)

(e) Placenta produces Iwo hormones, oestrogen and ..progesterone…. (testosterones/progesterone/FSH)

(f) The embryo inside the uterus is protected from jerks or mechanical shocks by ..amniotic fluid… (allantois/amniotic fluid/uterine wall)

(g) The period of complete development of the foetus till birth is termed as …gestation.. (gestation/ reproduction parturition)

Questions 5. Given below are sets of terms. In each case, rewrite the terms in the correct order so as to be in logical sequence

(a) Penis testis sperm duct, sperm, semen—

Testes, Sperms, Sperm duct, Semen, Penis

(b) Sperm duct, penis, testis, sperm, semen

Testes, Sperms, Sperm duct, Semen, Penis.

(c) Seminiferous tubules, sperm, sperm duct, accessory glands, semen, urethra

Seminiferous tubule → Sperm → Sperm duct → Accessory glands → Semen → Urethra

(d) Seminiferous trubule, penis, urethra, epididymis, vas deferens

(e) Graafian follicle, ostium, ovum, uterus, fallopian tube

Graafian follicle → Ostium → Fallopian tube → Uterus

(f) Implantation, fertilisation, ovulation, gestation

Ovulation → fertilization→ implantation → gestation

(g) Luteal phase, follicular phase, menstrual phase, ovulatory phase

Menstrual gland phase, follicular phase, ovulatory phase, luteal phase.

(h) Implantation, ovulation, child birth, gestation, fertilisation

Ovulation → fertilization→ implantation → gestation → child birth

 

Questions 6. Complete the following table by writing the name of the structure or the function of the structure given.

Structure Function
(a) Fallopian tube (i) …The site of fertilization for the sperm and ovum
(b) Umbilical cord (ii) ..connects placenta with foetus
(c)…Oxytocin…. (iii) Increase the force during uterine contraction
(d) Placental disc (iv) ..provides the sole physical link between mother and fetus
(e) …Testis…….. (v) Produces male gametes
(f) Corpus luteum (vi) ..releases a hormone called progesterone that prepares your uterus for pregnancy..

 

B. Short Answer Type Questions

Ch-13 Reproductive System Srijan Publications ICSE Class-10 Biology Solutions

(Page-202)

Questions 1. Answer the following questions.

(a) Define reproduction.–Reproduction is the process of producing new individuals of the same kind. Organisms reproduce in two ways- asexually and sexually. Asexual reproduction does not involve the fusion of male and female gametes

(b) What is semen?–Semen is the thick fluid that comes from men’s penis when they ejaculate during sexual activity. It carries sperm out of a man’s body so it can fertilize an egg and create an embryo (the first stage of pregnancy)

(c) Explain briefly the structure of sperm.–Sperm usually consist of two morphologically and functionally distinct regions enclosed by a single plasma membrane: the tail, which propels the sperm to the egg and helps it to burrow through the egg coat, and the head, which contains a condensed haploid nucleus (Figure 20-25).

(d) How do sperm ascend in the vas deferens from epididymis?–Once sperm cells are produced in the testis and accumulate in the epididymis, they rely on the ductus (vas) deferens and ejaculatory duct to propel them into the urethra and out of the penis during ejaculation

(e) Which fluid in human body contains fructose?–The seminal fluid consists of a viscous secretion that contains vitamin C, fructose, and fibrinogen. The seminal fluid contains fructose as the main energy source for the sperm.

(f) What is a Graafian follicle?–a fluid-filled structure in the mammalian ovary within which an ovum develops prior to ovulation

(g) What are the functions of uterus?– plays a critical role in menstruation, fertility and pregnancy. It’s hollow and muscular and sits between your rectum and bladder in your pelvis.

Questions 2. Give differences between the following.

(a) Semen and sperm–1. Sperm is the microscopic male reproductive cell while semen refers to the seminal fluid that contains millions of sperms. 2. Sperm is the genetic bearer and is haploid, while semen has no such characteristic other than nourishing the sperm cells and keeping them motile.

(b) Prostate gland and Cowper’s gland (nature of secretion)

Prostate gland Cowper’s glands
Prostate gland pours an alkaline secretion into the semen as it passes through the urethra. It neutralises acid in female’s vagina. The secretion from Cowper’s glands serves as a lubricant.

 

(c) Structure  of sperm and structure of ovum--Sperm is composed of a head, neck, middle piece and tail. Whole body of sperm is enclosed by plasma membrane. The head contains as enlongated haploid nucleus, the anterior portion is covered by a cap-like structure called as acrosome. This acrosome is filled with enzymes that help fertilisation of the ovum.

(d) Menarche and menopause–Menarche is the first menstruation of the human female on the attainment of puberty that occurs at about 13 years of age, whereas menopause is the phase in the human females life when ovulation and menstruation stop that occurs at about 45-55 years of age

(e) Graafian follicle and corpus luteum–-Graafian follicle is the fully mature follicle, which ruptures and releases the ovum. Graafian follicle gets transformed into the corpus luteum after ovulation. The Corpus luteum secretes progesterone that is important for maintaining pregnancy.

(f) Implantation and gestation (definition)--The process of fixing of the blastocyst to the wall of the uterus/endometrium is termed implantation. The full term of the development of the embryo in the uterus is called gestation

(g) ldentical twins and fraternal twins–To form identical or monozygotic twins, one fertilised egg (ovum) splits and develops into two babies with exactly the same genetic information. To form fraternal or dizygotic twins, two eggs (ova) are fertilised by two sperm and produce two genetically unique children

Questions 3. Mention the functions of the following

(a) Testicles–The Testis has following three functions. First, it produces spermatozoa, the male gametes. Second, it synthesizes testosterone, the principal male sex hormone. Third, it participates with the hypothalamus-pituitary unit in regulating reproductive function.

(b) Corpas luteum–Although it’s inside your ovaries, the corpus luteum’s job is to make your uterus a healthy place for a fetus to grow. It releases a hormone called progesterone that prepares your uterus for pregnancy. Once it’s no longer needed to make progesterone, your corpus luteum goes away.

(c) Placenta–The placenta is an organ that develops in the uterus during pregnancy. This structure provides oxygen and nutrients to a growing baby. It also removes waste products from the baby’s blood. The placenta attaches to the wall of the uterus, and the baby’s umbilical cord arises from it

(d) Amnion–Lined with ectoderm and covered with mesoderm (both are germ layers), the amnion contains a thin, transparent fluid in which the embryo is suspended, thus providing a cushion against mechanical injury. The amnion also provides protection against fluid loss from the embryo itself and against tissue adhesions

(e) Ammiotic fluid–Amniotic fluid surrounds the growing fetus in the womb and protects the fetus from injury and temperature changes. It also allows for freedom of fetal movement and permits musculoskeletal development

Questions 4. Give reasons for the following.

(a) Testes are located in scrotal sacs outside the abdomen in human males

(b) Twins may or may not be identical.

Answer :

(a) The testes is located outside the abdominal cavity because sperm formation requires a temperature lower than the body temperature. It is because scrotum has a temperature 1-3 degree Celsius lower than the normal body temperature, which is essential for the production of sperm or male gametes

(b)

  • Sometimes, two eggs are released from the ovaries at a time and both may get fertilised by two different sperms. Such twins are dizygotic and not identical.
  • Sometimes, a single fertilised egg may split during the early stages of cell division. …
  • Therefore, twins may or may not be identical

C. Long Answer Type Questions

Ch-13 Reproductive System Srijan Publications ICSE Class-10 Biology Solutions

(Page-202)

Questions 1. What are secondary sexual characters? What are accessory glands?

Answer : any of the physical characteristics that differentiate male and female individuals, as distribution of hair or fat on the body, breast and muscle development, deepening of the voice, etc., that are not directly related to reproduction and usually appear at puberty

The accessory glands of the male reproductive system are the seminal vesicles, prostate gland, and the bulbourethral glands. These glands secrete fluids that enter the urethra

Questions 2. List the organs of human male and female reproductive systems.

Answer : List the organs of human male reproductive systems.

  • Penis. The penis is the male organ for sexual intercourse. …
  • Scrotum. The scrotum is the loose pouch-like sac of skin that hangs behind the penis. …
  • Testicles (testes) …
  • Epididymis.

List the organs of human female reproductive systems.

A female’s internal reproductive organs are the vagina, uterus, fallopian tubes, and ovaries. The vagina is a muscular, hollow tube that extends from the vaginal opening to the uterus. Because it has muscular walls, the vagina can expand and contract

Questions 3. Give functions of (i) Acrosome, (ii) Epididymis and (iii) Seminal fluid.

Answer :

(i) Acrosome–The function of the acrosome is to help the sperm get through the egg’s protective coat and allow the plasma membranes of the sperm and egg to fuse

(ii) Epididymis —The most obvious function of the epididymis is to transport sperm from the rete testes to the vas deferens. Total transit time through the epididymis is generally between 10–15 days Transport is achieved primarily by rhythmic contractions of the smooth muscle layers surrounding the epididymis

(iii) Seminal fluid.–Fluid from the prostate and other sex glands that helps transport sperm out of the man’s body during orgasm. Seminal fluid contains sugar as an energy source for sperm

Questions 4. Why is the number of sperm produced always more than the number of egg produced?

Answer : Because not all the sperm gets to the egg(s). To ensure each egg will be fertilized there needs to be more sperm then egg(s). And sperms are motile and they have to compete with one another for their existence. In the end only one sperm fuses with the ova

Questions 5. What is placenta? How is placenta beneficial to the foetus ?

Answer : The placenta is an organ that develops in the uterus during pregnancy. This structure provides oxygen and nutrients to a growing baby. It also removes waste products from the baby’s blood. The placenta attaches to the wall of the uterus, and the baby’s umbilical cord arises from it.

You might also like
Leave a comment