The upper respiratory tract extends from the nose through the ________
trachea
larynx
pharynx
lungs
alveoli
The Correct Answer is C
A. Trachea: The trachea is part of the lower respiratory tract. It conducts air from the larynx to the bronchi but is not included in the upper respiratory tract.
B. Larynx: The larynx serves as a passageway for air and houses the vocal cords. It marks the boundary between the upper and lower respiratory tracts rather than being entirely part of the upper tract.
C. Pharynx: The upper respiratory tract extends from the nose and mouth through the pharynx. The pharynx conducts air toward the larynx and serves as a shared pathway for both air and food.
D. Lungs: The lungs are part of the lower respiratory tract, containing bronchi, bronchioles, and alveoli. They are not included in the upper respiratory tract.
E. Alveoli: Alveoli are microscopic air sacs within the lungs where gas exchange occurs. They are part of the lower respiratory tract, not the upper respiratory tract.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. smaller than; no neuronal:The anterior pituitary is actually larger than the posterior pituitary. While it does not have a direct neuronal connection, this choice incorrectly describes its size.
B. smaller than; a neuronal:This is incorrect because the anterior pituitary is larger, not smaller, and it does not have a direct neuronal connection to the hypothalamus.
C. larger than; no neuronal:The anterior pituitary is larger than the posterior pituitary and communicates with the hypothalamus via the hypophyseal portal system, a vascular connection, not a neuronal one. This allows hypothalamic releasing and inhibiting hormones to regulate anterior pituitary function.
D. similar in size to; no neuronal:The anterior pituitary is not similar in size to the posterior; it is significantly larger and constitutes the majority of the pituitary gland mass.
E. larger than; a neuronal:While the anterior pituitary is larger, it does not have a direct neuronal connection to the hypothalamus. Its regulation is via blood vessels, not neurons.
Correct Answer is C
Explanation
A. A chemical messenger that is triggered by the binding of a ligand on the cell surface and causes a change in DNA transcription:This describes the mechanism of some hormones or intracellular signaling molecules, particularly steroid hormones, but it is not a complete definition of a hormone itself.
B. Junctions between cells interconnecting their cytoplasm:This describes gap junctions, which allow direct cytoplasmic communication between adjacent cells. It is a structural feature, not a hormone.
C. A chemical messenger transported by the bloodstream that stimulates target cells in another organ often a good distance away:This accurately defines a hormone. Hormones are secreted by endocrine glands into the blood and travel to distant target cells, eliciting specific physiological responses.
D. Chemical messengers that travel across a synapse to stimulate another cell:This describes neurotransmitters, which act locally at synapses rather than being transported through the bloodstream.
E. Chemical messengers that diffuse from their point of origin locally to affect other cells physiology:This describes paracrine signaling, which is local and short-range. Hormones, in contrast, typically act on distant cells via the circulatory system.
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