A&P 2 L6 Flashcards
Sex cell= Sperm/ egg
Gamete
Reproduction without union of gametes
Asexual
Types of Asexual Reproduction:
Lower classes of animals; piece of organism breaks off & forms new individual
Fragmentation
Types of Asexual Reproduction:
Simple cell division to form a new organism
Fission
Types of Asexual Reproduction:
Only involves eggs; the development of unfertilized eggs
Parthogensis
Types of Asexual Reproduction:
One egg and One sperm;
Forms a zygote; then zygote splits
Identical Twins
Types of Asexual Reproduction:
Specialized structure bud and release; reproduces by forming buds by mitosis
Budding
Advantages of Asexual Reproduction
- Only one parent
- Produce a lot of individual in a
short period of time. - Adapted to their environment
Disadvantages of Asexual Reproduction:
- Very little genetic ability
- Not well adapted to changing
environment
Sexual Reproduction:
Sex cells- Sperm/ eggs combine
Union of Gametes
Advantages of Sexual Reproduction
- Genetic recombination- A lot
- Genetic Variability- A lot
- Adapt well to changing
environment
Disadvantages of Sexual Reproduction
- 2 parents
- Much more complex
reproductive processes and
reproductive structure
Body cells; example- zygote, skin cells
Somatic cell
Gonads- define and give 2 examples
Primary sex cell producing organ
Ex. Testes and ovaries
Every other structure besides “Gonads” in the male and female reproductive system is called secondary organs:
True or False
True
Fertilized eggs = (2N=diploid)
Zygote
1 replication of chromosomes and 2 cell division (tested & ovaries)
Meiosis
Define Mitosis:
1 Replication of chromosomes and 1 cell division
R= Haploid is:
Sperm and egg= N= 23
Single set of chromosomes
2n= Biploid
46 chromosomes
2 Full sets of chromosomes
2N= 46
The only cells in the human body that are not diploid cells are:
Sperm and Egg
Haploid Cells are:
Sperm and egg
What is “Spermatogenesis:
When sperm is produced and occurs in the testes
What is “Oogenesis:
Ovaries production of eggs
Name 2 types of asexual reproduction
Fission, budding, parthenogenesis, identical twins
Name 2 advantages of sexual reproduction
Genetic recombination, genetic variation, advantageous in changing environments
What was the 1st class of animals to no longer require water for sexual reproduction
Reptiles
Mammals with pouches are called
Marsupials
When animals moved onto the land from the water, fertilization and embryonic development went from _______ to _________
External/internal
Name 2 gonads in man
Testes & ovaries
What is gubernaclum and what is its function
Fibromuscular cord that aids in the descent of the testes from the abdominal cavity into the scrotum
What is acrosome
Structure found at the anterior end of a sperm cell; contains enzymes that aid in penetration of the egg
Approximately how long. Do sperm cells remains in the epididymis
18hrs
What are 2 substances that are secreted by the seminal vesicle
Alkaline fluid, fructose, prostaglandins
What is the gland located under the prostate gland that secrete a mucus-like lubricant
Bulbourethral glands (cowpers gland)
The pH of semen
7.5
What is most abundant in androgens
Testosterone
The hormone FSH and LH are found only in females. True or False
False
The external female reproductive organs are collectively known as the
Vulva
What male reproductive structure is homologous to labia majora
Scrotum
What hormone is produced by the corpus lutetium
Progesterone
The outermost layer if the uterine wall is called
Perimetrium
If fertilization occurs,it will occur in the
Oviduct (Fallopian tube)
What is a zygote
Fertilize egg
The transformation of a fertilized egg into a complete organism is known as
Development
What is a fertilization membrane and what is responsible for its formation
Membrane produced by an egg to prevent the entry of sperm cells; initiated by the entry of sperm cell
Layer of cells enclosing the embryo in a blastocyst is known as
Trophoblast