Question

1.The first stage in human development, ____________________, takes place in the uterine tube when sperm cells encounter a secondary oocyte.

2. The single cell that results when a sperm and an ovum unite is called a _______________

3.Inherited traits determined by genes specifically located in the sex chromosomes are called __________________________ traits.

4.Chemical messengers secreted into the bloodstream by endocrine glands, that initiate a change in a target cell are called ____________________

5.The hormone, produced by the anterior pituitary gland, that stimulates the mammary glands to produce milk is ________________________

6.The hormone, made by the hypothalamus and secreted from the posterior pituitary, that stimulates ejection of milk and contraction of the uterus is __________________

7. The hormone, made by the pancreas, that increases the uptake of glucose into cells, thus lowering the level of glucose in the blood, is ___________________

Answer 1

Ans:- 1.

Fertilization.

The first stage in the human development, fertilization, takes place in the uterine tube when sperm cells encounter a secondary oocyte.

2.

Zygote.

The single cell that results when a sperm and an ovum is unite is called a zygote.

3.

Sex - linked traits.

Inherited traits determined by genes specifically located in the sex chromosomes are called sex inherited traits.

4.

Hormones.

Chemical messengers secreted into the blood stream by Endocrine glands, that initiate a change in a target cell is called hormones.

5.

Prolactin.

The hormone produced by the anterior pituitary gland, that stimulates the mammary glands to produce milk is prolactin in.

6.

Oxytocin.

The hormone , made by the hypothalamus and secreted from the posterior pituitary that stimulates ejection of milk and contraction of the uterus is Oxytocin.

7.

Insulin,

The hormone made by the pancreas , that increases the intake of glucose into cells , thus lowering the level of glucose in the blood is insulin. It is secreted from the beta cells of the pancreas.