Plasma Membranes Allow Certain Molecules to Pass, While Blocking Others

question 57

Multiple Choice

Plasma membranes allow certain molecules to pass, while blocking others. Membranes with this property are called

• A) impermeable.
• B) freely permeable.
• C) selectively permeable.
• D) actively permeable.
• E) nonpermeable.

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Definitions:

Ectopic Pregnancy

A pregnancy in which the fertilized egg implants outside the uterus, often in the fallopian tube, and is non-viable.

Embryo Transfer

A step in assisted reproduction where an embryo is placed into the uterus of a female with the intent of establishing a pregnancy.

Preembryonic Development

The earliest phase of human development, from fertilization to the formation of the embryonic disc, which is before the actual embryo begins to form.

Morula

An early stage in embryonic development consisting of a solid ball of cells.