Nokea
Which of the following is a steroid?
- A. FSH
- B. LH
- C. estrogen
- D. GnRH
Correct Answer: C
Rationale: The correct answer is C: estrogen. Estrogen is a type of steroid hormone derived from cholesterol. Steroids are a specific group of lipids characterized by a particular molecular structure. Estrogen plays a vital role in the development and regulation of the female reproductive system.
Choice A, FSH, and choice B, LH, are both peptide hormones, not steroids. Peptide hormones are made up of amino acids and are not derived from cholesterol.
Choice D, GnRH, is also a peptide hormone that regulates the release of other hormones in the body, particularly in the reproductive system.
In summary, estrogen is the only steroid hormone among the options provided, making it the correct choice.
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Lower jaw bone is called as
- A. Maxilla
- B. Mandible
- C. Temporal bone
- D. Menton
Correct Answer: B
Rationale: The lower jaw bone is known as the mandible. The mandible is the only movable bone in the skull, forming the lower jaw and holding the lower teeth in place. The maxilla (A) is the upper jaw bone. The temporal bone (C) is a bone that forms part of the skull, but it is not the lower jaw bone. Menton (D) is a landmark on the mandible, not the name of the bone itself. Therefore, the correct answer is B (Mandible) as it is specifically designated as the lower jaw bone.
A fertilized egg, which represents the first cell of a new individual, is called a(n) ________.
- A. blastocyst
- B. zygote
- C. fetus
- D. embryo
Correct Answer: B
Rationale: The correct answer is B: zygote. A zygote is formed when a sperm cell fertilizes an egg cell, marking the beginning of a new individual's development. It is the first cell of the new organism with a full set of chromosomes.
A: Blastocyst is a later stage of development after the zygote has undergone several cell divisions.
C: Fetus refers to the later stages of development when the embryo has developed recognizable features.
D: Embryo is the stage after the zygote when the cells start to differentiate into different tissues and organs.
A 22-yr-old patient reports her concern about not having a menstrual period for the past 7 months. Which statement by the patient indicates a possible related factor to the amenorrhea?
- A. “I drink at least 3 glasses of nonfat milk every day.”
- B. “I run 7 to 8 miles every day to manage my weight.”
- C. “I am not sexually active but currently I have an IUD
- D. “I was treated for a sexually transmitted infection 2 years ago.”
Correct Answer: B
Rationale: The correct answer is B. Running 7 to 8 miles daily can lead to amenorrhea due to excessive exercise-induced stress on the body, affecting hormone levels and menstrual cycle. This is known as exercise-induced amenorrhea. Choices A, C, and D do not directly correlate with amenorrhea. Choice A indicates a healthy calcium intake. Choice C suggests the presence of an IUD, which is not typically associated with amenorrhea. Choice D indicates a history of STI, which may not directly cause amenorrhea.
A man is taking a number of medications, one of which appears to be interfering with the emission phase of the sexual act. Which of the following medications could cause this problem?
- A. A medication that prolongs the duration of action of nitric oxide
- B. A medication that blocks the smooth muscle receptors for nitric oxide
- C. A medication that increases the release of nitric oxide
- D. A testosterone-like androgen compound
Correct Answer: B
Rationale: The correct answer is B because blocking the smooth muscle receptors for nitric oxide would interfere with vasodilation necessary for an erection during the emission phase of the sexual act. Choice A would actually enhance the effects of nitric oxide, Choice C would increase nitric oxide release which would typically improve sexual function, and Choice D, a testosterone-like androgen compound, would not directly affect the emission phase related to nitric oxide.
Inflammation of bone and bone marrow secondary to infection is called?
- A. Osteitis.
- B. Osteochondritis.
- C. Osteom
- D. Osteomyelitis
Correct Answer: D
Rationale: The correct answer is D: Osteomyelitis. Osteomyelitis refers to inflammation of bone and bone marrow secondary to infection. "Osteitis" (choice A) is a general term for bone inflammation without specifying infection. "Osteochondritis" (choice B) is inflammation of bone and cartilage, not bone marrow. "Osteom" (choice C) is not a recognized medical term. Therefore, based on the specific definition provided in the question, osteomyelitis is the most appropriate answer.