The question asks for the definition of menstruation. To answer this, it's essential to understand the basic physiological processes of the female reproductive cycle.
Correct Option: C) Shedding of uterine lining. Menstruation is the monthly shedding of the uterine lining (endometrium) when pregnancy does not occur. This process is a normal part of the female reproductive cycle.
The question asks to identify the hormone secreted by the pancreas from the given options. This requires knowledge of the endocrine system and the specific hormones produced by different glands.
Correct Option: C) Insulin is a peptide hormone produced by the beta cells of the pancreatic islets. Its main function is to regulate carbohydrate and fat metabolism in the body. Insulin causes cells in the liver, muscle, and fat tissue to take up glucose from the blood, storing it as glycogen in the liver and muscle, and as fat in adipose tissue. This lowers blood glucose levels.
The question asks about the primary function of adrenalin (also known as epinephrine). To answer this, recall the role of adrenalin in the human body, particularly its involvement in the "fight or flight" response.
Correct Option: B) Adjust to stress
The sex of an unborn child is determined at the moment of fertilization. This determination depends on the specific combination of sex chromosomes contributed by the parents. Humans have two types of sex chromosomes: X and Y.
Correct Option: C) Father's sperm — The father's sperm carries either an X or a Y chromosome. If an X-carrying sperm fertilizes the egg, the child will be female (XX). If a Y-carrying sperm fertilizes the egg, the child will be male (XY).
The question asks for the specific term used to describe the first occurrence of menstruation in girls. This is a direct recall question from human biology, specifically reproductive health.
Correct Option: B) Menarche. Menarche is the medical term for the first menstrual period in a female. It signifies the onset of puberty and reproductive capability.
The question asks to identify the organ responsible for producing the hormone estrogen. This requires knowledge of the endocrine system and the specific functions of various glands in hormone production.
Correct Option: D) Ovaries — The ovaries are the primary female reproductive organs responsible for producing eggs and the female sex hormones, estrogen and progesterone.