Chapter 43

LH

- Induces follicle maturation- Stimulates formation of the corpus luteum

Progesterone

- Maintains uterine lining for pregnancy- Stops ovarian cycle when pregnant

The shedding of the inner lining of the uterus that would have supported implantation and early embryo growth had fertilization occurred.

1-5 days

Rising estrogen levels trigger a sharp increase in the release of luteinizing hormone from the pituitary gland, which promotes release of the mature oocyte

14 days

The inner lining of the uterus is prepared for implantation in response to increased levels of progesterone.

15-28

The pituitary gland releases a hormone that stimulates the growth of follicles that are responsible for the maturation of the oocyte.

6-13

Place the steps of fertilization in the order that they occur.

A mature oocyte is ovulated and moves down the fallopian tube A sperm cell passes through the follicle cells surrounding the oocyte a portion of the zona pellucida is digested by enzymes found within the acrosome located on the tip of the sperm cell A sperm cell binds to and fuses with the plasma membrane of the egg the haploid nucleus of the sperm enters the cytoplasm of the egg the sperm and egg nuclei fuse to form a zygote The developing embryo is implanted on the inner linning of the uterus

What is the difference between asexual reproduction and sexual reproduction?

Asexual reproduction produces genetically identical offspring, whereas sexual reproduction produces offspring that are genetically different from each other and from their parents.

order..

Blood enters the capillaries of the glomerulus Solutes and water from the blood plasma filter into the capsular space of the glomerulus Most substances are absorbed from, the filtrate back into the blood Specific substances are secreted from the blood into the renal tubule Water reabsorption conserves body fluid and concentrates the urine Undine exists the collecting duct

Testosterone

Growth of pubic hair increased muscle mass and ST Inhibition of GNRH Secretion

Follicle stimulating hormone

Spermatogenesis Stimulation of sertoli cells

gamate

cell produced by meiosis sperm cell

zygote

diploid cell resulting from fertilization a fertilized egg cell

budding

formation of offspring from outgrowths that break free or remain attached yo form a colony used by baker's yeast

Endoderm

inner layer of the embryo lines the digestive tract forms the stomach

Mesoderm

middle layer of the embryo forms the kidneys and gonads forms the muscle, bones, and cartilage

What gland is responsible for producing both follicle-stimulating hormone (FSH) and luteinizing hormone (LH)?

pituitary gland

Which statement best describes ovulation?

release of a secondary oocyte from a mature follicle

In which type of environment is external fertilization most likely to occur?

river

parthenogenesis

seen in some reptiles growing and developing of embryo from unfertilized egg

What is the function of Sertoli cells found within the seminiferous tubules located within the testes?

support, nourish, and regulate the production of sperm

fission

used by prokaryotic microorganisms replacement of parent by two equal offspring

Ectoderm

Outer layer of the embryo forms the brain and spinal cord Forms the central nervous system

FSH

Triggers initial follicle growth

Estrogen

Triggers secondary sex characteristics- Decline in production induces menopause- High levels increase LH secretion during follicular phase

Asexual

a amoeba produces two identical daughter cells via mitosis

Sexual reproduction

a mature haploid egg fertillized by a haploid sperm cell after a male and female dog mate

fertilization

a process fusing together nuclei gametes

fragmentation

breaking off of body parts that regenerate into whole new individuals star fish

Identify the scenario that best describes parthenogenesis.

A whiptail lizard develops from an unfertilized egg.

Luteinizing hormones

Stimulation of leydig cells production of testosterone