STD 11 - 19. Chemical coordination and integration — NEET STD 11 Science — Question

The adrenal cortex secretes many hormones, commonly called as corticoids. Which option are correct for corticoids ?
(i) Androgenic steroids secreted by the adrenal cortex play a role in the growth of axial hair, pubic hair and facial hair during puberty.
(ii) Aldosterone is the main glucocorticoid and cortisol is the main mineralocorticoid in our body.
(iii) Glucocorticoids stimulate gluconeogenesis, lipolysis, proteolysis.
(iv) Cortisol stimulates erythropoiesis, cardiovascular system, blood pressure, and glomerular filtration rate.
(v) Mineralocorticoids inhibit inflammatory reactions by suppressing the immune response.
(vi) Glucocorticoids inhibit cellular uptake and utilisation of amino acids.
(vii) Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of Na+ and water and excretion of K+ and phosphate ions.

The rocks that contain fossil are

Ligament connects

Fill in the blanks
(i) A mechanism acts as a check on the renin- angiotensin mechanism.
(ii) The signal for micturition is initiated by the stretching of urinary bladder as it gets filled with urine. In response, the B on the walls of bladder sends signals to the C.
(iii) The neural mechanisms causing micturition is called D.
(iv) On an average, E gm of urea is excreted out per day.
(v) Presence of F and G in urine is indicative of diabetes mellitus.
(vi) Sweat produced by sweat glands is a watery fluid containing NaCl, small amount of mainly H and I.
(vii) Sebaceous glands eliminate certain substance like J, K and L through sebum.
(viii) The condition in which there is accumulation of urea in blood is called M and may lead to kidney failure. In such patients urea can be removed by a process called N
(ix) The dialysing fluid used in haemodialysis has the same composition as that of plasma except the O
(x) P is condition in which a stone or insoluble mass of crystallised salts formed within the kidney.
(xi) Q is inflammation of glomeruli of kidney.
choose the correct option given below :-

The velocity of blood flow is minimum in

Assertion: Each seminiferous tubule is lined inside by spermatogonia and Sertoli cells.
Reason: The spermatogonia undergo meiotic divisions leading to sperm formation, while Sertoli cells provide nutrition to the dividing germ cells.

Hypothalamus is a part of brain but also secrete some hormones. Which of the following characters are correct for hypothalamus ?
(i) These hormones regulate the synthesis and secretion of pituitary hormones.
(ii) The hormones produced by hypothalamus are of two types, the releasing hormones and the inhibiting hormones.
(iii) Gonadotropin releasing hormone (GnRH) is a releasing hormone.
(iv) Somatostatin is a releasing hormone.
(v) Hormones of hypothalamus reach the anterior pituitary gland through a portal circulatory system.
(vi) The posterior pituitary is under the direct neural regulation of the hypothalamus.

One of the following does the same work as is done by nephridia in earthworm