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Reproductive System
Studying for the test
26
Biology
7th Grade
04/20/2006

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Term
Hormones
Definition
the chemicals that are made by endocrine glands
Term
Target cells
Definition
cells that recognize a hormones chemical structure. ONly certain hormones can attach to certain target cells
Term
Role of the Endocrine System
Definition
Controls many of the body's daily activities and long term changes such as developement
Term
negative feedback
Definition
the process that the body uses to turn the hormones on and off. If the level of the hormone gets too high, then the gland stops producing it. If the level gets too low, then the gland turns back on.
Term
How do hormones and target cells work together?
Definition
Only certain target cells can work with certain hormones.
Term
Fertilization
Definition
When a sperm and an egg join.
Term
How many chromosomes does a sperm have?
Definition
23
Term
How many chromosomes does an egg have?
Definition
23
Term
How many chromosomes does a person have?
Definition
46
Term
Ovulation
Definition
when an egg is released from an ovary
Term
What is the male sex cell?
Definition
Sperm
Term
What is the female sex cell?
Definition
Egg
Term
Where are sperm produced? Eggs?
Definition
Testes. Ovaries.
Term
Purpose of the male reproductive system
Definition
Make testosterone, make sperm, and help the boy develop into a man
Term
Purpose of the female reproductive system
Definition
Make estrogen and progesterone, make egss, nourish a baby until it is born, turn a girl into a woman
Term
Pathway of sperm
Definition
Testes -> Vas deferens -> urethra -> out of the body
Term
Pathway of the egg
Definition
Ovary -> Fallopian tubes -> uterus -> out of the body if the egg is not fertilized
Term
What occurs during the menstrual cycle?
Definition
The lining of the uterus gets thicker, and an egg is released. If the egg is not fertilized, then she will start her "period" and shed the lining of the uterus.
Term
How long is the menstrual cycle?
Definition
About 28 days.
Term
What is heredity?
Definition
The process of inheriting genes from parents
Term
Genetics
Definition
the study of heredity
Term
Dominant alleles
Definition
The gene that is always seen in an organism.
Term
Recessive alleles
Definition
The gene that is hidden by a dominant gene if it is presend.
Term
DNA
Definition
long chain molecules that make up chromosomes
Term
allele
Definition
Different forms of the same gene
Term
gene
Definition
a segment of DNA that has information about a specific trait.
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