STD 12 - 2. human reproduction — NEET STD 11 Science — Question

Statement I: Primary oocyte within the tertiary follicle grows in size and completes its first meiotic division.
Statement II: The second meiotic division occurs in secondary oocyte in Graafian follicle and results in the formation of a second polar body and a haploid ovum (ootid).

The similarity of bone structure in the forelimbs of many vertebrates is an example of

Where would you find mast cells

Statement I: Malpighian tubules are excretory structure of crustaceans like prawns.
Statement II: Green glands perform the excretory function in insects.

Mast cells are associated with

Sailent feature/s of Balanoglossus is/are:

Assertion: Atrial natriuretic factor (ANF) decreases blood pressure.
Reason: When blood pressure is increased, ANF is secreted which causes dilation of the blood vessels.

The pituitary gland is divided into two major parts, adenohypophysis and neurohypophysis. Which of the following characters are incorrect ?
(i) The pituitary gland is located in a bony cavity called sella tursica.
(ii) Adenohypophysis consists of two portions, pars distalis and pars intermedia while neurohypophysis consists of one portion, pars nervosa.
(iii) The pars nervosa commonly called anterior pituitary, produces LH and FSH.
(iv) Pars intermedia secretes melanocyte stimulating hormone (MSH).
(v) Pars distalis also known as posterior pituitary, stores and releases two hormones called oxytocin and vasopressin.
(vi) In humans, the pars intermedia is almost merged with pars distalis.
(vii) Hormone of posterior pituitary actually synthesised by the hypothalamus.