Where does the circulating lymph return to cardiovascular circulation?
Subclavian vein
Carotid artery
Ascending aorta
Jugular vein
The Correct Answer is A
a. Subclavian vein: The lymphatic system drains lymph into the cardiovascular system at the subclavian veins, specifically where the lymphatic ducts (thoracic duct and right lymphatic duct) empty.
b. Carotid artery: This is an artery supplying blood to the brain, not involved in returning lymph.
c. Ascending aorta: This is the part of the aorta that rises from the heart and distributes oxygenated blood, not involved in lymph return.
d. Jugular vein: While close to the lymphatic ducts, lymph specifically drains into the subclavian veins.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
a: Cervical: 7, Thoracic: 14, Lumbar: 6 - This count for the thoracic vertebrae is incorrect; there are typically 12 thoracic vertebrae.
b. Cervical: 7, Thoracic: 12, Lumbar: 5-The vertebral column consists of cervical (neck), thoracic (upper back), lumbar (lower back), sacral, and coccygeal regions. The cervical region has 7 vertebrae, the thoracic region has 12, and the lumbar region has 5.
c: Cervical: & Thoracic: 12, Lumbar: 5, Sacral: 3 - This count for the cervical vertebrae is incorrect; there are typically 7 cervical vertebrae.
d: Cervical: & Thoracic: 14, Lumbar: Sacral: 4 - The counts for cervical and lumbar vertebrae are incorrect; there are typically 7 cervical vertebrae and 5 lumbar vertebrae.
Correct Answer is D
Explanation
a. Carrying stimulus to the spinal cord and the brain from all other parts of the body: This is the function of afferent neurons, not efferent neurons.
b. Conducting impulses from sensory neurons to motor neurons: This describes interneurons, which relay signals between sensory and motor neurons.
c. Regulating neuron function: This is a vague description and doesn't specifically relate to the primary role of efferent neurons.
d. Carrying stimulus away from the brain and spinal cord: This correctly describes efferent neurons, which carry motor commands from the central nervous system to muscles and glands.
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