Which of the following factors is responsible for the formation of concentrated urine?

NEET-2019 [Excretory-Products-and-their-Elimination] [class-xi ]

• Low levels of antidiuretic hormone.
• Secretion of erythropoietin by juxtaglomerular complex.
• Maintaining hyperosmolarity towards inner medullary interstitium in the kidneys.
• Hydrostatic pressure during glomerular filtration.
Correct Option: C  [ Maintaining hyperosmolarity towards inner medullary interstitium in the kidneys. ]

Remark:

Use of an artificial kidney during hemodialysis may result in:
(A) Nitrogenous waste build-up in the body
(B) Non-elimination of excess potassium ions
(C) Reduced absorption of calcium ions from gastrointestinal tract
(D) Reduced RBC production
Which of the following options is the most appropiate?

NEET-2019 [Excretory-Products-and-their-Elimination] [class-xi ]

• (A) and (B) are correct
• (B) and (C) are correct
• (A) and (D) are correct
• (C) and (D) are correct
Correct Option: D  [ (C) and (D) are correct ]

Remark:

Select the correct option.

NEET-2019 [Locomotion-and-Movement] [class-xi ]

• 8th, 9th and 10th pairs of ribs articulate directly with the sternum.
• There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs.
• 11th and 12thpairs of ribs are connected to the sternum with the help of hyaline cartilage.
• Each rib is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum.
Correct Option: B  [ There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs. ]

Remark:

Which of the following muscular disorders is inherited ?

NEET-2019 [Locomotion-and-Movement] [class-xi ]

• Tetany
• Myasthenia gravis
• Muscular dystrophy
• Botulism
Correct Option: C  [ Muscular dystrophy ]

Remark:

Which part of the brain is responsible for thermoregulation?

NEET-2019 [Neural-Control-and-Coordination] [class-xi ]

• Hypothalamus
• Cerebrum
• Corpus callosum
• Medulla oblongata
Correct Option: A  [ Hypothalamus ]

Remark:

Which of the following statements is correct?

NEET-2019 [Neural-Control-and-Coordination] [class-xi ]

• Cornea consists of dense connective tissue of elastin and can repair itself.
• Cornea is an external, transparent and protective proteinacious covering of the eye-ball.
• Cornea is convex, transparent layer which is highly vascularised.
• Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye.
Correct Option: B  [ Cornea is an external, transparent and protective proteinacious covering of the eye-ball. ]

Remark:

Which of the following glucose transporters is insulin-dependent?

NEET-2019 [Chemical-Coordination-and-Integration] [class-xi ]

• GLUT I
• GLUT II
• GLUT IV
• GLUT III
Correct Option: C  [ GLUT IV ]

Remark:

Match the following hormones with the respective disease:

NEET-2019 [Chemical-Coordination-and-Integration] [class-xi ]

• (A)-(V), (B)-(I), (C)-(II), (D)-(III)
• (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
• (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
• (A)-(V), (B)-(IV), (C)-(I), (D)-(III)
Correct Option: D  [ (A)-(V), (B)-(IV), (C)-(I), (D)-(III) ]

Remark:

How does steroid hormone influence the cellular activities?

NEET-2019 [Chemical-Coordination-and-Integration] [class-xi ]

• Using aquaporin channels as second messenger.
• Activating cyclic AMP located on the cell membrane.
• Binding to DNA and forming a gene-hormone complex.
• Changing the permeability of the cell membrane.
Correct Option: C  [ Binding to DNA and forming a gene-hormone complex. ]

Remark:

Which of the following statements is incorrect?

NEET-2019 [Reproduction-in-Organisms] [class-xii ]

• Morels and truffles are edible delicacies.
• Yeasts have filamentous bodies with long threadlike hyphae.
• Claviceps is a source of many alkaloids and LSD.
• Conidia are produced exogenously and ascospores endogenously.
Correct Option: B  [ Yeasts have filamentous bodies with long threadlike hyphae. ]

Remark: