The anterior pituitary is _________ the posterior pituitary and has _________ connection to the hypothalamus.
smaller than; no neuronal
smaller than’ a neuronal
larger than; no neuronal
similar in size to; no neuronal
larger than: a neuronal
The Correct Answer is C
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
The thymus is largest during childhood and gradually involutes after puberty, decreasing in size and activity while still producing some T lymphocytes throughout life. Similarly, the pineal gland, which regulates circadian rhythms through melatonin secretion, also undergoes gradual calcification and reduction in size with age. Both organs show age-related shrinkage.
Correct Answer is D
Explanation
A. Hilum:The hilum is the region where bronchi, blood vessels, and nerves enter and exit the lung. While important for lung structure, it is not the area that accommodates the heart.
B. Oblique fissure:The oblique fissure separates the lobes of the lung but does not form an indentation for the heart. Its role is purely in dividing the lung into anatomical sections.
C. Base:The base of the lung rests on the diaphragm and supports the lung in the thoracic cavity. It is not shaped to accommodate the heart.
D. Cardiac notch:The cardiac notch is a concave space on the medial aspect of the left lung specifically molded to fit the heart. This indentation allows the heart to sit comfortably in the thoracic cavity without compressing the lung tissue.
E. Apex:The apex is the superior tip of the lung extending above the clavicle. It is distant from the heart and unrelated to the heart’s position in the thoracic cavity.
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