Which of the Following Statements Are True of the Urination

question 139

Multiple Choice

Which of the following statements are true of the urination reflex? (Read carefully and select all of the correct statements.)

• A)This is a flexor reflex over which we may exert voluntary control.
• B)The effector of the reflex is the detrusor muscle, which contracts.
• C)The stimulus for the reflex is stretching of the external urethral sphincter.
• D)The part of the CNS directly involved in the reflex is the spinal cord.

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Definitions:

Trachea

Principal thoracic air duct of terrestrial vertebrates; windpipe. One of the microscopic air ducts (or tracheal tubes) branching throughout the body of most terrestrial arthropods and some terrestrial mollusks.

Partial Pressure

The pressure that a gas in a mixture of gases would exert if it alone occupied the entire volume.

Nitrogen Gas

A diatomic gas that is colorless, odorless, and makes up about 78% of the Earth's atmosphere, used by certain bacteria to produce usable forms of nitrogen for plants.

Sea Level

The average height of the sea's surface between high and low tide, used as a base reference for measuring elevation and depth on Earth.