Cortical nephrons can be distinguished from juxtamedullary nephrons by ____________.
their filtration rate
their location within the renal cortex
the size of their renal corpuscle
whether they drain into a collecting duct or directly into the renal pelvis
The Correct Answer is B
A. Their filtration rate: Both types of nephrons have similar filtration rates; the difference lies primarily in their structure and location.
B. Their location within the renal cortex: Cortical nephrons are located primarily in the renal cortex, while juxtamedullary nephrons are located closer to the medulla and have long loops of Henle that extend deep into the medulla.
C. The size of their renal corpuscle: The renal corpuscle size does not differ significantly between cortical and juxtamedullary nephrons.
D. Whether they drain into a collecting duct or directly into the renal pelvis: All nephrons drain into a collecting duct; none drain directly into the renal pelvis.
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Correct Answer is D
Explanation
A. To the lining of the uterine tube: If an embryo attaches to the uterine tube, it results in an ectopic pregnancy, which is not typical or safe.
B. To the myometrium: The myometrium is the muscular layer of the uterus and is not the usual site of embryo attachment.
C. To the perimetrium: The perimetrium is the outermost layer of the uterus and is not involved in embryo implantation. This is incorrect.
D. To the endometrium: The endometrium is the inner lining of the uterus, where the embryo typically implants and attaches. This is the correct answer.
Correct Answer is A
Explanation
A. The cardiovascular system is primarily involved in transporting blood and nutrients but does not directly excrete waste.
B. The respiratory system: The respiratory system helps excrete carbon dioxide, a waste product of metabolism.
C. The digestive system excretes waste through the process of defecation.
D. The integumentary system (skin) excretes waste through sweat.
E. The urinary system is directly involved in the excretion of waste products through urine.