What action does the copper used in Copper T have?

Correct Answer: D

Rationale: The correct answer is D, Spermicidal. The copper in Copper T exerts its action by affecting sperm viability and motility, thus preventing fertilization. Choices A, B, and C are incorrect because Copper T primarily works by preventing sperm from reaching and fertilizing the egg, rather than acting on blastocysts, bacteria, or bacteriocins.

Correct Answer: D

Rationale: The correct answer is D, Intrauterine Devices (IUDs). Barrier methods of birth control physically block sperm from reaching the egg. Diaphragms, cervical caps, and vaults are examples of barrier methods as they create a barrier that prevents sperm from reaching the cervix. In contrast, IUDs work by altering the cervical mucus and uterine lining, making it difficult for sperm to reach the egg, but they do not physically block sperm like barrier methods do.

Correct Answer: C

Rationale: In the context of pharmacology and reproductive health, it is crucial to understand the mechanisms, effects, and administration of oral contraceptive pills (OCPs). In the case of the oral contraceptive pill 'Saheli', option C is incorrect because it is not a steroidal preparation. 'Saheli' is a non-steroidal OCP that contains Centchroman as its active ingredient. This makes it unique compared to traditional steroidal OCPs. Option A is correct as oral contraceptive pills are designed for females to prevent unwanted pregnancies. Option B stating that 'Saheli' has very few side effects is incorrect as all medications, including contraceptives, have potential side effects, though 'Saheli' may have fewer compared to traditional steroidal OCPs. Option D is also incorrect because 'Saheli' is not an 'Once a week' pill; it is typically taken once a week for three weeks followed by a week off, unlike daily administration of traditional OCPs. Understanding the differences between various types of OCPs, their mechanisms of action, and potential side effects is vital for healthcare providers, pharmacists, and individuals using these medications. It helps in making informed decisions regarding contraceptive choices based on individual health needs and preferences.

Correct Answer: C

Rationale: Amniocentesis is a prenatal test that involves examining chromosomes in the amniotic fluid to detect genetic abnormalities. Therefore, the correct answer is 'Chromosomes.' The other choices, such as 'Fingers,' 'DNA,' and 'Proteins,' do not accurately represent what is analyzed during an amniocentesis procedure and are unrelated to the genetic information obtained through this test.

Correct Answer: C

Rationale: The correct answer is C, 'Zona pellucida.' The ovum receives the sperm at the zona pellucida, which is the glycoprotein layer surrounding the plasma membrane of the oocyte. This layer plays a crucial role in preventing polyspermy. Choices A and B, 'Animal pole' and 'Vegetal pole,' are incorrect as they refer to different regions of the egg and are not where the sperm fertilizes the ovum. Choice D, 'None of the above,' is incorrect as the sperm indeed interacts with the zona pellucida during fertilization.