Page 42 - Nai_Udaan_final

You have Asked (Answers)

Answers to the previous Edition’s You have asked

1.The blue blood is because the protein, haemocyanin, which carries oxygen around the octo-
pus's body, contains copper rather than iron like we have in our own haemoglobin.

2.As a general rule, animals with a high metabolic rate die early, and those that burn energy more
slowly plod on for decades. That’s why Tortoise and turtles live for so long.

3.Goosebumps are the result of tiny muscles flexing in the skin, making hair follicles rise up a bit.
This causes hairs to stand up.

4.As we get older , the pigment cells in our hair follicles gradually die and colour changes.

5.Four forces keep an airplane in the sky . They are lift, weight , thrust and drag. Lift pushes the
airplane up. The way air moves around the wings gives the airplane lift.

6.As the epithelial cells within the follicle and matrix multiply, the older cells are pushed out,
upwards through the skin. These cells die and harden thus turning into hair or nails . The
process is called keratinisation and makes our hair and nails grow.

7.The water is in fact not colorless: even pure water is not colorless, but has a slight blue tint to
it, best seen when looking through a long column of water. The blueness in water is not caused
by scattering of light, which is responsible for the sky being blue.

8.Most dreaming occurs during REM (rapid eye movement) sleep, which we cycle through
periodically during the night. Sleep studies show our brainwaves are almost as active during
REM cycles as they are when we’re awake. Experts believe the brainstem generates REM sleep
and the forebrain generates dreams.

9.Cornea

10.All consciousness arises from the brainstem, and it starts as feelings. Electromagnetic energy
in the brain enables brain matter to create our consciousness and our ability to be aware and
think, according to a new theory developed by Professor Johnjoe McFadden from the University
of Surrey.

Tell us what you think

If you have a suggestion or a comment, please share with us on
doesciencemagazine@gmail.com

NOTE:
1. Please write your Name & Mobile Number while sending your suggestion or comment for better communication.
2. By submitting your suggestion/comment, you agree to allow Directorate of Education, GNCTD to use your suggestions
or comments, good or bad, in their publication with the option of showing your name.
Or if you prefer, you may write to us, at Office of ‘Nai Udaan’, Room No-2 (Adjacent to Computer Cell), Directorate of Edu -
cation, Old Secretariat, Delhi-110054

40