The tubular structure of the uterus that projects a short distance into the vagina is called the_
Cervix
Perimetrium
Vestibule
External os
The Correct Answer is A
A. Cervix: The narrow, tubular, inferior portion (“neck”) of the uterus that protrudes into the vagina; it contains the external os.
B. Perimetrium: The outer serosal covering of the uterus (visceral peritoneum); not a tube and doesn’t project into the vagina.
C. Vestibule: The external genital space between the labia minora with the urethral and vaginal openings; not part of the uterus.
D. External os: Merely the opening of the cervix into the vagina—not the entire projecting tubular structure.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","D"]
Explanation
A. It promotes vasoconstriction of blood vessels:Angiotensin II (RAAS mediator) is a potent vasoconstrictor, raising systemic vascular resistance and affecting renal blood flow.
B. It stimulates thirst:Angiotensin II acts on the brain (hypothalamus) to stimulate thirst and ADH release, promoting fluid intake and retention.
C. It lowers blood pressure:RAAS activation raises blood pressure by vasoconstriction and increased sodium/water retention.
D. It increases water reabsorption in the kidneys:Aldosterone promotes Na⁺ reabsorption (water follows), and angiotensin II/ADH actions lead to increased water retention—overall increasing water reabsorption.
E. It stimulates the release of renin:Renin release is the initiating step of RAAS activation (triggered by low renal perfusion); once RAAS is active, angiotensin II typically provides negative feedback that suppresses further renin release rather than stimulating it.
Correct Answer is B
Explanation
A. DCT:A tubular (urine) segment, not a blood vessel.
B. Efferent arteriole:Carries blood away from the glomerulus after filtration.
C. Collecting duct:Urine pathway, not for blood.
D. Loop of Henle:Part of the nephron tubule for filtrate, not a vessel.
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