Which of the following secretes the hormone, relaxin, during the later phase of pregnancy?
1. Foetus
2. Uterus
3. Graafian follicle
4. Corpus luteum
Which of these is not an important component of initiation of parturition in humans?
1. Release of oxytocin
2. Release of prolactin
3. Increase in estrogen and progesterone ratio
4. Synthesis of prostaglandins
Receptors for sperm binding in mammals are present on:
1. | Perivitelline space | 2. | Zona pellucida |
3. | Corona Radiata | 4. | Vitelline membrane |
Which set is similar:
1. Corpus luteum – Graafian follicles
2. Sebum-sweat
3. Bundle of his – Pacemaker
4. Vita - Niacin
Mainly which hormones control the menstrual cycle in human beings:
1. FSH
2. LH
3. FSH, LH, Estrogen
4. Progesterone
Ovulation in the human female normally takes place during which phase of the menstrual cycle:
1. Just before the end of the secretory cycle.
2. At the beginning of the proliferative phase.
3. At the end of the proliferative phase.
4. At the mid-secretory phase.
What happens during fertilisation in humans after many sperms reach close to the ovum?
1. | Only two sperms nearest the ovum penetrate zona pellucida |
2. | Secretions of acrosome help one sperm enter the cytoplasm of the ovum through zona pellucida |
3. | All sperms except the one nearest to the ovum lose their tails |
4. | Cells of corona radiata trap all the sperms except one |
Secretions from which one of the following are rich in fructose, calcium and some enzymes:
1. Liver
2. Pancreas
3. Salivary glands
4. Male accessory glands
In a human female, the blastocyst:
1. | gets implanted into uterus three days after ovulation |
2. | gets nutrition from uterine endometrial secretion only after implantation |
3. | gets implanted in endometrium by the trophoblast cells |
4. | forms placenta even before implantation |
Identify the human development stage shown below as well as the related right place of its occurrence in a normal pregnant woman, and select the right option for the two together:
Developmental stage | Site of occurrence | |
1. | Blastula | End part of fallopian tube |
2. | Blastocyst | Uterine wall |
3. | 8-celled morula | Starting point of fallopian tube |
4. | Late morula | Middle part of fallopian tube |