What type of tissue makes up the symphysis pubis?
Elastic cartilage CT
hyaline cartilage CT
fibrocartilage CT
dense regular CT
The Correct Answer is C
A. Elastic cartilage CT: Elastic cartilage provides flexibility and maintains shape in structures such as the external ear and epiglottis. It is not strong enough to withstand the compressive forces required at the symphysis pubis.
B. Hyaline cartilage CT: Hyaline cartilage covers articular surfaces and provides smooth movement at joints, but it lacks the tensile strength and shock absorption needed at the symphysis pubis.
C. Fibrocartilage CT: The symphysis pubis is composed of fibrocartilage, which contains dense bundles of collagen fibers. This structure allows it to resist compression and tension while providing strength and flexibility to support the pelvis.
D. Dense regular CT: Dense regular connective tissue forms tendons and ligaments, which provide strong attachment in one direction. It is not suitable for the multidirectional stress placed on the symphysis pubis.
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Related Questions
Correct Answer is C
Explanation
A. apocrine glands:Apocrine glands are sweat glands found in regions like the axillae and groin. They secrete a thicker fluid that, when acted upon by skin bacteria, produces body odor. They are not responsible for earwax production.
B. eccrine glands:Eccrine glands are the most numerous sweat glands, found across much of the skin. They secrete a watery solution important for thermoregulation but do not contribute to earwax formation.
C. ceruminous glands:Ceruminous glands are specialized modified apocrine glands located in the external auditory canal. They produce cerumen, or earwax, which protects the ear canal by trapping debris and providing antimicrobial properties.
D. merocrine glands:Merocrine secretion refers to the method by which many glands, including eccrine sweat glands, release their products through exocytosis. These glands do not produce earwax and are mainly involved in sweat production.
Correct Answer is C
Explanation
A. Delivers important sensory information about our environmental conditions to our brains:The skin contains sensory receptors that detect touch, pressure, temperature, and pain, sending this information to the brain for interpretation.
B. Holds a portion of the blood's total volume to be shunted (diverted) to other organs when needed:The skin’s extensive vascular network can store blood and redirect it to vital organs during times of need, helping regulate blood pressure and thermoregulation.
C. Gives the body its overall shape, loss of this function can be seen with the drooping of skin with age:While the skin contributes to appearance and elasticity, the body’s overall shape is primarily determined by the skeletal system and underlying musculature.
D. Conducts chemical reactions using the sun’s energy to initiate vitamin D synthesis:The skin is essential for the synthesis of vitamin D when exposed to UVB rays from sunlight, which is a critical metabolic function supporting calcium homeostasis and bone health.
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