BIOL 110 Chapter 36 Mastering DSM

A hermaphrodite is ______________.

An individual with both male and female reproductive systems.

Examples of birth control methods that prevent the production or release of gametes are _____________.

Hormonal contraception and sterilization.

The ectoderm germ layer gives rise to the _______________.

Jaws, teeth, and epidermis of the skin

In which location does fertilization usually take place in a human female?

Oviduct

What structure is incorrectly paired with its function?

Seminiferous tubule -- adds fluid containing mucus, fructose, and prostaglandins to semen

What is the correct path that sperm travel in leaving the body of a human male?

Seminiferous tubule -- epididymis -- vas deferens -- ejaculatory duct -- urethra

What is the correct sequence of stages in the development of sperm in the process of spermatogenesis?

Spermatogonial stem cell -- spermatogonium -- primary spermocyte -- secondary spermocyte -- early spermatid -- sperm cell

Certain maternal diseases, drugs, alcohol, and radiation are most dangerous to embryonic development during _______________.

The first three months, when organogenesis is occurring.

In the human ovarian cycle, ovulation is triggered by a sharp rise in luteinizing hormone (LH). What is the cause of this sharp rise?

A rise in estradiol from the follicle.

The secretory phase of the uterine cycle ____________________.

Coincides with the luteal phase of the ovarian cycle

What is a means of sexual reproduction?

Fusion of egg and sperm

Pheromones are ______________.

Generally effective at very low concentrations.

What is an advantage of internal fertilization?

Internal fertilization can occur outside of aquatic or marine habitats

What is the relationship between Leydig cells and Sertoli cells?

Leydig cells stimulate the production of sperm cells, and Sertoli cells nourish developing sperm.

What is an accurate statement concerning mating behavior in asexually reproducing species?

Mating behavior is a stimulus that can help to bring about ovulation in asexually reproducing species.

What statement correctly describes how the production of human sperm and egg differs?

Meiosis is an uninterrupted process in males, whereas in females it resumes when a follicle matures and is only completed when a sperm penetrates the egg.

What is an accurate statement about sexual reproduction?

Most animals produce offspring by sexual reproduction.

What is a difference between reproduction of humans (and other primates) and all other mammals?

Only humans (and other primates) have menstrual cycles.

What is an accurate statement about parthenogenesis?

Parthenogenesis appears rare in vertebrates.

What hormone is incorrectly paired with its function?

Prolactin - stimulates breast development at puberty

The human female's external reproductive structures are ________________.

The clitoris, two sets of labia, and vaginal opening

The "twofold cost" of sex refers to ______________.

The fewer reproductive offspring produced by individuals of species that have two sexes.

What is an accurate statement concerning the cleavage stage of early development?

There is no increase in mass.

What hormone is produced by the human embryo during the first trimester and is necessary for maintaining a pregnancy?

hCG (human chorionic gonadotropin)