Give appropriate biological or technical terms for the following:
(i) Process of maintaining water and salt balance in the body
(ii) Hormones which regulate the secretion of other endocrine glands.
(iii) Movement of molecules of a substance from their higher concentration to lower concentration when they
are in direct contact.
(iv) The condition in which a pair of chromosomes carry similar alleles of a particular character.
(v) The complex consisting of a DNA strand and a core of histones.
(vi) The onset of menstruation in a young girl.
(vii) Squeezing out of white blood cells from the capillaries into the surrounding tissues.
(viii) The fluid which surrounds the foetus.
(ix) The relaxation phase of the heart
(x) The difference between the birth rate and the death rate.
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Answers
Answer:
- Homeostasis.
- Tropic hormones.
- Diffusion.
- Homozygous chromosomes.
- Nucleosome.
- Menarche.
- Dispedesis.
- Amniotic fluid.
- Diastole.
- Growth rate.
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Answer:
☛Excess water, electrolytes, and wastes are transported to the kidneys and excreted, helping to maintain osmotic balance.
☛The tropic hormones from the pituitary gland play an important role in regulating the activity of most other endocrine glands. Therefore, the pituitary gland is also known as master gland.
☛Diffusion is a process in which the molecules spreads due to their kinetic energy and movement of molecules is from higher concentration to lower concentration.
☛The condition in which a pair of chromosomes carries similar alleles of a particular character is called homozygous condition.
☛Chromatin is a complex of DNA and proteins that forms chromosomes within the nucleus ofeukaryotic cells.
☛Most girls get their first period when they're around 12. But getting it any time between age 10 and 15 is OK. Most of the time, a girl gets her period about 2 years after her breasts start to develop.
☛They squeeze out of the walls of blood vessels through emigration or diapedesis, then may move through tissue fluid or become attached to various organs where they fight against pathogenic organisms, diseased cells, or other threats to health.
☛Amniotic fluid is a clear, slightly yellowish liquid that surrounds the unborn baby (fetus) during pregnancy. It is contained in the amniotic sac.
☛Diastole is the term used to describe the relaxation of the heart. When the heart is in this state of relaxation, the pressure within the heart is very low and blood is passively flowing through the atria and into the ventricles through the open atrioventricular valve, or AV valve.
☛Births and deaths are natural causes of population change. The difference between the birth rate and the death rate of a country or place is called the natural increase. For example, if the birth rate is 14 per 1,000 population, and the death rate is 8 per 1000 population, then the natural increase = 14 - 8 = 6.