Bio Chapter 34

The scrotom is an important adaptation in human males because the optimum temperature for sperm development is

2 to 4 degrees BELOW normal body temperature

One function of the male reproductive system in mammals is to

Allow for delivery of gametes needed for reproduction

Function of the placenta

Allows nutrients to diffuse from the mother to the embryo

Function of the testis

Develop sperm

The inability of sperm cells to move normally could prevent the production of offspring by interfering with

Fertilization

The human reproductive system is regulated by

Hormones

the reproductive cycle in females is regulated primarily by

estrogen and progesterone

The permanent cessation of the menstrual cycle is known as

menopause

A temporary suspension of the menstrual cycle normally occurs during

pregnancy

Testes are adapted to produce

Sperm cells that may be involved in fertilization

What structure produces cells that have the potential to become gametes?

Testes

Which structure produces the male hormone responsible for characteristic such as muscle development, deep voice, and gamete production

Testis

Regulation of sexual reproductive cycles of human males is related most directly to the presence of the hormone

Testosterone

What is the human female reproductive system adapted for

Transport of oxygen through a placenta to a fetus

In human males, which structure is used to transport sperm out the body

Urethra

In order to unite with an egg, a sperm cell must travel from

Vagina to uterus to oviduct

Which event would most probably result in the production of fraternal twins?

Two eg cells are each fertilized by separate sperm cells

What is the uterus function

Serves as a site of implantation of the embryo

A pathogen passing from a mother to her fetus could cause

an infection in the fetus

Identical twins develop from

One egg, fertilized by one sperm cell

Essential materials needed for development are transported to a human fetus through the

Placenta

The primary function of the human male reproductive system is to

Produce and transport gametes

The major function of the male and female organ systems are to

Provide cells that are necessary for the survival of the species

The vagina is part of which body system

Reproductive