Important Practice Questions and Answers in Biology Part 7

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8. The cornea and lens of the mammalian eyes are both

(a) Richly supplied by nerves.

(b) Richly supplied by blood vessels.

(c) Transparent and they diverge the light rays to form an image on retina.

(d) Transparent and they contribute in the formation of image on retina.

Answer: (d)

9. The black pigment in the eye which reduces the internal reflection is located in

(a) Retina

(b) Iris

(c) Sclerotic

(d) Cornea

Answer: (b)

10. Scala vestibuli is connected with

(a) Fenestra rotundus

(b) Fenestra ovalis

(c) Scala tympani

(d) Scala media

Answer: (d)

11. The perception of sound by a mammal involves the stimulation of the mechano receptors located in the internal ear

(a) On the organ of corti.

(b) On the reissner՚s membrane

(c) In the secculus.

(d) In the semicircular canal.

Answer: (a)

12. Vibrations of fenestra ovalis are transmitted to

(a) Perilymph of scala vestibule.

(b) Perilymph of scala tympani.

(c) Endolymph of scala media.

(d) Endolymph of scala vestibule.

Answer: (a)

1. The hormones of posterior are oxytocin and vasopressin; but is better known as

(a) Antidiuretic hormone

(b) Growth hormone

(c) Corticotrophic hormone

(d) Neurohypophyseal

Answer: (a)

2. Which hormone stops the release of FSH from the pituitary after fertilization?

(a) Placental hormone

(b) Fertilizing

(c) Estradiol

(d) Luteinizing hormone

Answer: (a)

3. Which of the following groups of endocrine glands are involved in carbohydrate metabolism?

(a) Pancreas, Neurohypophysis and adrenal.

(b) Pancreas, pituitary and thyroid.

(c) Pancreas, pituitary and liver.

(d) Pancreas, adenohypophysis and adrenal.

Answer: (b)