Menstrual Cramps Occur When

question 40

Multiple Choice

Menstrual cramps occur when

• A)luteinizing hormone signals the ovaries to produce progesterone.
• B)prostaglandins released during the menstrual cycle promote uterine muscle contraction.
• C)a surge in estrogen levels promotes uterine muscle contraction.
• D)the woman has been engaging in excessive exercise.

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Definitions:

Ecological Barriers

Physical, biological, or chemical factors that limit the distribution or movements of organisms within ecosystems.

Hybrid Sterility

A postzygotic barrier where hybrid offspring are produced but are incapable of reproducing, often due to differences in the parental chromosomes.

Prezygotic Isolation

Reproductive barriers that occur before fertilization, preventing species from interbreeding and producing hybrid offspring.

Mechanical Isolation

A form of reproductive isolation where differences in the size and shape of reproductive organs prevent mating between species.