control in humans

Question 1

what are hormones

Answer 1

chemical substances

Question 2

what is internal environment controlled by

Answer 2

nervous system

Question 3

water contents in body

Answer 3

the lungs - when we exhale
the skin - through sweating
passing urine - produced by the kidneys.

Question 4

Ion content is controlled by the loss of what ions

Answer 4

the skin - through sweating

passing urine - produced by the kidneys.

Question 5

why is Temperature of the body controlled ?

Answer 5

This is controlled to maintain the temperature at which enzymes work best. Body temperature is controlled by sweating, shivering, and controlling blood flow to the skin.

Question 6

why are Blood sugar levels controlled?

Answer 6

This is controlled to provide cells with a constant supply of energy. Blood sugar level is controlled by the release and storage of glucose controlled by insulin.

Question 7

what is the Hormones in the menstrual cycle

Answer 7

The menstrual cycle in women is a recurring monthly process in which the lining of the uterus (the womb) is prepared for pregnancy. If pregnancy does not happen, the lining is shed at menstruation.
Several hormones control this cycle, which includes controlling the release of an egg each month from an ovary, and changing the thickness of the uterus lining. These hormones are secreted by the ovaries and pituitary gland.

Question 8

what is the Oral contraceptives controlled by?

Answer 8

Human fertility is controlled by hormones. This means that knowledge of hormones can be used to decide to increase, or reduce, the chances of fertilisation and pregnancy.

Question 9

Benefits and risks of contraceptives

Answer 9

Risks - This caused women to have significant side effects, such as changes in weight, mood and blood pressure.
Benefits - Modern birth-control pills contain much less oestrogen. Some only contain progesterone, which also leads to fewer side effects.

Question 10

what does the Fertility treatments increase

Answer 10

increase a woman’s chance of becoming pregnant, although the treatment may not always work. On the other hand, because the treatment boosts the production of mature eggs, multiple conceptions sometimes occur, with twins or triplets being expected.

Question 11

what complications does the fertility treatment cause?

Answer 11

This increases the risk of complications in pregnancy and childbirth, and may lead to premature or underweight babies.