Nokea
The secondary oocyte completes its second meiotic division
- A. just after fertilization
- B. just after ovulation
- C. just before fertilization
- D. just before ovulation
Correct Answer: A
Rationale: The correct answer is A: just after fertilization. After fertilization, the secondary oocyte completes its second meiotic division, forming a mature ovum and a polar body. This process occurs to ensure the correct chromosome number in the resulting zygote. Choices B, C, and D are incorrect because the completion of the second meiotic division occurs specifically after fertilization, not before or just after ovulation or fertilization.
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Once sperm are produced by the testes they move into and mature in the
- A. seminiferous tubes
- B. penis
- C. vas deferens
- D. epididymis
Correct Answer: D
Rationale: The correct answer is D: epididymis. After being produced in the testes, sperm move into the epididymis for maturation. The epididymis provides the optimal environment for sperm storage and maturation, allowing them to gain motility and fertilization capability. The seminiferous tubes (A) are where sperm are produced, not matured. The penis (B) is the external organ for ejaculation, not maturation. The vas deferens (C) is the tube that carries mature sperm from the epididymis to the urethra, not the site of sperm maturation.
At the level of the testicle, the efferent ducts:
- A. continue the rete testis;
- B. open in the epididymal duct;
- C. open in the deferent duct;
- D. are 30;
Correct Answer: A
Rationale: Rationale for Correct Answer A: The efferent ducts continue the rete testis. This is true because the efferent ducts are a series of small ducts that connect the rete testis to the epididymis. The rete testis is a network of tubules located at the back of the testicle where spermatozoa from the seminiferous tubules are collected. Therefore, the efferent ducts serve to transport spermatozoa from the rete testis to the epididymis for further maturation.
Summary of Incorrect Choices:
B: Opening in the epididymal duct is incorrect because the efferent ducts lead into the epididymis, not the epididymal duct itself.
C: Opening in the deferent duct is incorrect because the efferent ducts do not lead directly into the deferent duct, but rather connect the rete testis to the epididym
Ectoderm, mesoderm, and endoderm are three tissue layers that are formed during _____________ stage.
- A. morula
- B. blastula
- C. gastrula
- D. neurula
Correct Answer: C
Rationale: The correct answer is C: gastrula. During the gastrula stage of embryonic development, the blastula undergoes a process called gastrulation, where the three primary germ layers - ectoderm, mesoderm, and endoderm - are formed. The ectoderm gives rise to the nervous system and skin, the mesoderm forms muscles and organs, and the endoderm develops into the lining of the digestive tract and respiratory system. Morula (A) is an earlier stage where the zygote divides into multiple cells. Blastula (B) is the stage before gastrula where a hollow ball of cells is formed. Neurula (D) is a stage specific to vertebrate embryos where the neural tube begins to form.
During a history, a patient reports rectal bleeding, a warning sign of colorectal cancer. The nurse correlates which clinical finding with colorectal cancer?
- A. Thick, blood-tinged mucus within the rectum
- B. A pus-filled cavity in the anorectal area
- C. An irregular mass with raised edges on the rectal wall
- D. A small, smooth nodule protruding from the rectum
Correct Answer: C
Rationale: The correct answer is C because an irregular mass with raised edges on the rectal wall is a common clinical finding associated with colorectal cancer. This mass could be a tumor or polyp, which can lead to rectal bleeding. Option A is incorrect because thick, blood-tinged mucus is more commonly associated with inflammatory conditions. Option B is incorrect as a pus-filled cavity suggests an abscess or infection, not colorectal cancer. Option D is incorrect because a small, smooth nodule is more indicative of hemorrhoids rather than colorectal cancer.
Which bone is called as the shoulder bone
- A. Clavicle
- B. Sternum
- C. Humerus
- D. Scapula
Correct Answer: D
Rationale: The correct answer is D: Scapula. The scapula is commonly known as the shoulder blade and is the bone that connects the upper arm bone (humerus) to the collarbone (clavicle) to form the shoulder joint. The other choices, A: Clavicle, is the collarbone; B: Sternum, is the breastbone; and C: Humerus, is the upper arm bone, are not specifically referred to as the shoulder bone. Therefore, the scapula is the correct answer as it is directly associated with the shoulder joint.