| A | B |
|---|
| The endocrine system acts on the body through chemical products called | hormones. |
| Which of the following is an example of negative feedback in the endocrine system? | When the amount of a hormone reaches a certain level, the endocrine system stops the release of that hormone. |
| The scrotum is part of the | male reproductive system. |
| Human eggs are usually fertilized in the | fallopian tube. |
| In a female’s body, an egg develops in an ovary, and the uterus prepares for the arrival of a fertilized egg during | the menstrual cycle. |
| When a human egg is not fertilized, extra blood and tissue from the uterus are released through the vagina in a process called | menstruation. |
| What is the main event that happens during puberty? | An individual’s body becomes able to reproduce. |
| Sex cells contain_______ as many chromosomes as other body cells | half |
| The release of a mature egg into a fallopian tube is called | ovulation |
| The time between childhood and adulthood is called | adolescence |
| A hormone released by the ____________________ glands controls the amount of calcium in the blood. | parathyroid |
| During the menstrual cycle, the lining of the ____________________ builds up with extra blood and tissue to prepare for a fertilized egg. | uterus |
| The period of development during which a person becomes physically able to reproduce is called | puberty |
| the hypothalamus links the nervous system and the endocrine system. | hypothalamus |
| the ______ gland regulates the conversion of food to energy | thyroid |
| the _______ glands produce _______, which increases heart rate and energy | adrenal, adrenaline |
| the ______ produces _______ which regulates blood sugar | pancreas, |
| the _____ gland regulates other glands | pituitary |
| the _____produce _____, male gametes | testicles, sperm |
| the _____produce _____, female gametes | ovaries, eggs |
