Increasing Circulating Levels of Thyroid Hormone Heighten the Sympathetic Nervous

question 56

Multiple Choice

Increasing circulating levels of thyroid hormone heighten the sympathetic nervous system's physiologic response to stimulation. What effect does this have on the cardiac system?

• A)Increases stroke volume
• B)Decreases cardiac rate
• C)Lengthens the QRS interval
• D)Decreases blood pressure

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Definitions:

Male Reproductive System

The series of organs and structures in males responsible for producing, maintaining, and transporting sperm and seminal fluid for reproductive purposes.

Spermatotheca

A specialized structure in the reproductive tract of some female animals where sperm is stored after mating until it is needed to fertilize eggs.

Refractory Period

A recovery phase after orgasm during which an individual is unable to achieve another orgasm.

Ejaculation

The release of semen from the male reproductive tract, typically occurring during sexual climax.