Acrosome reaction in sperm is triggered by (a) capacitation (b) release of lysin (c) influx of Na+ (d) release of fertilizin.

Acrosome reaction in sperm is triggered by
(a) capacitation (b) release of lysin
(c) influx of Na+ (d) release of fertilizin.
by

1 Answer

Answer :

(c) total
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Fertilizin is a chemical substance produced from (a) polar bodies (b) middle piece of sperm (c) mature eggs (d) acrosome.

Description : Fertilizin is a chemical substance produced from (a) polar bodies (b) middle piece of sperm (c) mature eggs (d) acrosome.

Last Answer : (c) mature eggs

Acrosome reaction of sperm is triggered by

Description : Acrosome reaction of sperm is triggered by

Last Answer : Acrosome reaction of sperm is triggered by A. Capacitation B. Release of lysin C. Release of fertilizin D. Influx of `Na^(+)`

Poisons like cyanide inhibit Na+ efflux and K+ influx during cellular transport. This inhibitory effect is reversed by an injection of ATP. This demonstrates that (a) ATP is the carrier protein in the transport system (b) energy for Na+-K+ exchange pump comes from ATP (c) ATP is hydrolysed by ATPase to release energy (d) Na+-K+ exchange pump operates in the cell.

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Last Answer : (b) energy for Na+-K+ exchange pump comes from ATP

Assertion : The acrosomal secretions of sperm , help it in entering in the cytoplasm of the ovum . Reason : It contains sperm lysin .

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Last Answer : Assertion : The acrosomal secretions of sperm , help it in entering in the cytoplasm of the ovum . ... . D. If both Assertion & Reason are False.

Sperm capacitation involves:

Description : Sperm capacitation involves:

Last Answer : Sperm capacitation involves: A. Change in shape B. Release of mitochondria C. Removal of membrane fatty acids D. Hyaluronic acid.

Capacitation of of sperm occurs in:

Description : Capacitation of of sperm occurs in:

Last Answer : Capacitation of of sperm occurs in: A. Female genital tract B. Vagina C. Vas efferene D. Vas deferens.

In female genital tract, sperm capacitation is brought about by

Description : In female genital tract, sperm capacitation is brought about by

Last Answer : In female genital tract, sperm capacitation is brought about by A. Hyaluronic acid B. Removal of membrane fatty acids C. Prostaglandins D. Oxytocin

Capacitation of sperm is provided by

Description : Capacitation of sperm is provided by

Last Answer : Capacitation of sperm is provided by A. Urethra B. Vas deferens C. Vagina D. Seminal vesicle

Capacitation refers to changes in the (a) ovum after fertilisation (b) sperm after fertilisation (c) sperm before fertilisation (d) ovum before fertilisation.

Description : Capacitation refers to changes in the (a) ovum after fertilisation (b) sperm after fertilisation (c) sperm before fertilisation (d) ovum before fertilisation.

Last Answer : (c) sperm before fertilisation

Write the function of each of the following (i)Seminal vesicle (ii)Scutellum (iii)Acrosome of human sperm -Biology

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Acrosome of sperm contains

Description : Acrosome of sperm contains

Last Answer : Acrosome of sperm contains A. Hydrolytic enzymes B. DNA C. Fructose D. Mitochondria.

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Description : In the absence of acrosome the sperm

Last Answer : In the absence of acrosome the sperm A. Cannot penetrate the egg B. Cannot get food C. Cannot get energy D. Cannot swim.

Acrosome of sperm contains

Description : Acrosome of sperm contains

Last Answer : Acrosome of sperm contains A. Hyluronidase and acrosin B. Hyaluronic acid and acrosin C. Hippuric acid and uric acid D. Creatinine.

Which part of the spermatid forms acrosome of sperm ?

Description : Which part of the spermatid forms acrosome of sperm ?

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What happens during fertilisation in humans after many sperms reach close to the ovum? (a) Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida. (b) All sperms except the one nearest to the ovum lose their tails. (c) Cells of corona radiata trap all the sperms except one. (d) Only two sperms nearest the ovum penetrate zona pellucida.

Description : What happens during fertilisation in humans after many sperms reach close to the ovum? (a) Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida. (b) All sperms except ... all the sperms except one. (d) Only two sperms nearest the ovum penetrate zona pellucida.

Last Answer : (a) Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida.

Which one of the following statements about human sperm is correct? (a) Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation. (b) The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation. (c) Acrosome serves as a sensory structure leading the sperm towards the ovum. (d) Acrosome serves no particular function

Description : Which one of the following statements about human sperm is correct? (a) Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation. (b) The ... a sensory structure leading the sperm towards the ovum. (d) Acrosome serves no particular function

Last Answer : (b) The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation.

9.Acrosome is important for ----------- . a)ATP production, b)Dissolving membrane of ovum, c)Motility of sperm, d)Nutrition of sperm

Description : 9.Acrosome is important for ----------- . a)ATP production, b)Dissolving membrane of ovum, c)Motility of sperm, d)Nutrition of sperm

Last Answer : b)Dissolving membrane of ovum,

Which process begins after Na influx essentially stops at its plateu a. Depolarization b. Repolarization c. both d. none

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Last Answer : D. Prolongation of voltage sensitive neuronal Na+ channel inactivation

The symptoms of allergen-mediated asthma result from which of the following? (a) Increased release of mediators from mast cells (b) Increased adrenergic responsiveness of the airways (c) Inceased vascular permeability of bronchial tissue (d) Decreased calcium influx into the mast cell (e) Decreased prostaglandin production

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The Symptoms of allergen-mediated asthma result from which of the following? (a) Increased release of mediators from mast cells (b) Increased adrenergic responsiveness of the airways (c) Increased vascular permeability of bronchial tissue (d) Decreased calcium influx into the mast cells (e) Decreased prostaglandin production

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The following are true about rods in darkness: a. there is tonic release of neurotransmitters b. the sodium ion channels are open c. the potassium ion channels are shut d. there is a net influx of sodium ions

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Sperms produce an enzymatic substance or lysin for dissolving egg coverings. It is called

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Description : Sperm release pathway?

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Which is an example of negative feedback? A) Nursing action stimulates the hypothalamus to release oxytocin that triggers mammary gland milk production. B) When the blood becomes dilute, ADH is no longer released from the hypothalamus. C) Uterine stretching sends nerve impulses to the hypothalamus that releases oxytocin that triggers uterine contraction. D) FSH and LH stimulate the gonads to produce sperm or eggs. E) TRH stimulates the anterior pituitary to release thyroid-stimulating hormone.

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Acute exacerbations of asthma can be triggered by all of the following except (a) Bacterial of viral pneumonia (b) Hypertsensitivity reaction to penicillin (c) Discontinuation of asthma medication (d) Hot, dry weather (e) Stressful emotional events

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Atomic explosion is triggered by - (1) thermo nuclear reaction (2) chemical reaction (3) controlled chain reaction (4) uncontrolled chain reaction

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Acrosome is made up of

Description : Acrosome is made up of

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Which set of enzymes is found in the acrosome of mammalian spermatozoa :

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Description : Space between acrosome and nucleus is called :-

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Acrosome formation in spermatogenesis occurs in which stage ?

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Description : he following is true of nifedipine except: A. It can aggravate urine voiding difficulty in elderly males with prostatic hypertrophy B. It promotes Na+ retention by a renal tubular action to ... release from pancreas D. At high doses it can paradoxically increase the frequency of angina pectori

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