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प्रश्न
List two example of each diseases caused due to (i) bacterial infection and (ii) viral infection. Which device or devices may be used to prevent the spread of such diseases.
उत्तर
Examples of STDs caused by bacterial infection:-
1. Gonorrhoea
2. Syphilis
Examples of STDs caused by viral infection:-
1. Herpes
2. Acquired immunodeficiency syndrome (AIDS)
Contraceptive devices such as condom can be used to prevent the spread of STDs. Condoms are made of a thin rubber, which is used to cover the penis and the vagina in males and females, respectively.
संबंधित प्रश्न
What is the main difference between sperms and eggs of humans? Write the importance of this difference.
Name the cells that secrete Testosterone
State the main function of the Leydig cells
The diagram given below is that of a developing human foetus. Study the diagram and then answer the questions that follow:
(i) Label the parts numbered 1 to 3 in the diagram.
(ii) Mention any two functions of the part labelled 2 in the diagram.
(iii) Explain the significance of the part numbered 3 in the diagram.
(iv) Define the term ‘Gestation’. What is the normal gestational period of the developing human embryo?
(v) Mention the sex chromosomes in a male and female embryo.
Which one of the following best describes the function of the umbilical cord? It :
(a) feeds the embryo with digested substances.
(b) conveys nutrients and wastes to and from the embryo respectively
(c) removes waste matter from the embryo to the mother's blood.
(d) supplies oxygenated blood from the mother to the embryo.
X and Y are two human beings. The organ A in the reproductive system of X releases a mature gamete B once a month which goes into a tube-like structure C through a funnel-like opening. The organ D in the reproductive system of Y makes and releases gametes E which pass through a duct F and are introduced by an organ of Y, into the body of X. B and E fuse together in C to form a new cell G. The cell G divides repeatedly to form a ball of cells H which gets embedded in the lining of organ I of reproductive system of X where it grows and develops into a baby.
(a) Name (i) organ A, and (ii) gamete B.
(b) Write two names of tube-like structure C.
(c) Name (i) organ D, and (ii) gamete E.
(d) Write two names of duct F.
(e) Name (i) cell G (ii) ball of cells H, and (iii) organ I.
(f) Out of X and Y, which one is (i) male, and (ii) female?
Write the functions of secretions of prostate gland and seminal vesicles in humans.
“Gender of child is determined by the male partner of couple”. Draw a diagram explaining the above statement.
Choose the Odd One Out:
Choose the Odd One Out:
