STD 12 - 3. reproductive health — NEET STD 11 Science — Question

Which one of the following is correct?

Fill in the blanks and choose the correct option given below.
(i) CO₂ + H₂O ⇔ H₂CO₃ The above reaction is catalyzed by enzyme A , which is present in higher concentration in B and in minute concentration in C of blood.
(ii) Every 100ml of deoxygenated blood delivers approximately D ml of CO₂ in alveoli.
(iii) Exchange of O₂ and CO₂ at the alveoli and tissues occur by E .
(iv) Respiratory rhythm is maintained by the respiratory centre in F region of brain.
(v) A G centre in pons region of brain and chemosensitive area in the medulla can alter respiratory mechanism.
(vi) The chemosensitive area in medulla is sensitive to H and I.
(vii) Receptors associated with aortic arch and J recognize changes in CO₂ and H concentration.
(viii) K is a difficulty in breathing causing wheezing due to inflammation of bronchi and bronchioles.
(ix) Emphysema is a chronic disorder in which L are damaged due to which respiratory surface is decreased.
(x) Long exposure to dust, in industries involving grinding or stone-breaking, can lead to inflammation leading to M and thus cause serious lung damage.

A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has

Amoebiasis is prevented by

Which of the following is associated with decrease incardiac output?

Mark the given statements True (T) or False (F) :
(i) The secretions of endocrine glands are called hormones.
(ii) Hormones are non-nutrient chemicals which act as intracellular messengers and are produced in trace amount.
(iii) The hypothalamic hormones are called gonadotrophin releasing hormone (GnRH) which stimulates the pituitary to synthesis and release gonadotrophins.
(iv) Somatostatin hormone from the hyphothalamus stimulates the release of growth hormone from pituitary.
(v) The pituitary gland is located in a bony cavity called Sella tursica and is attached to hypothalamus by a stalk.
(vi) Neurohyphosis part of pituitary consists of two portion, pars distalis and pars intermedia.
(vii) Pars intermedia, portion of pituitary secretes only one hormone called melanocyte stimulating hormone.
(viii) The posterior part of pituitary gland is pars nervosa, which is also called neurohypophysis.
(ix) Neurohypophysis of pituitary synthesise and releases two hormones oxytocin and vasopressin.
(x) Low-secretion of GH by pituitary leads to gigantism and over-secretion to pituitary dwarfism.
Choose the correct option given below :-

The secretion of aldosterone by adrenal cortex is directly controlled by