Question

IUDS which are used by females?
A). Are implanted under the skin and they release progestogen and estrogen.
B). Act as spermicidal jellies.
C). Release copper ions within the uterus that increase phagocytosis of sperm.
D). Block the entry of sperm into vagina.

Answer 1

Hint: An IUD , also referred to as intrauterine contraceptive or coil, may be a small, often T-shaped contraception device that's inserted into the uterus to stop pregnancy. IUDs are one sort of long-acting reversible contraception.

Complete answer:
An IUD (IUD), also referred to as intrauterine contraceptive (IUD or ICD) or coil, may be a small, often T-shaped contraception device that's inserted into a woman's uterus to stop pregnancy the kinds of intrauterine devices available are :
Nonhormonal: Copper-containing IUD (ParaGard and others),
Hormonal: Progestogen-releasing IUD (Mirena and others).
Most copper IUDs have a plastic T-shaped frame that's wound around with pure electrolytic copper wire and/or has copper collars (sleeves). The arms of the frame hold the IUD in situ near the highest of the uterus. They work by damaging sperm and disrupting their motility in order that they're unable to hitch an egg.
Specifically, copper acts as a spermicide within the uterus by increasing levels of copper ions, prostaglandins, and white blood cells within the uterine and tubal fluids, The increased copper ions within the cervical mucus inhibit the sperm's motility and viability, preventing sperm from traveling through the cervical mucus, or destroying it because it passes through. So, the right option is 'release copper ions within the uterus that increase phagocytosis of sperm.

Hence the choice C is correct.

Note: An IUD (IUD), also referred to as intrauterine contraceptive (IUD or ICD) or coil, may be a small, often T-shaped contraception device that's inserted into the uterus to stop pregnancy. IUDs are one sort of long-acting reversible contraception (LARC).