Tag: coordination

Questions Related to coordination

The direct function of GnRH is to

biology coordination hormonal control of menstrual cycle regulation of the menstrual cycle life processes in living organisms- part 2

  1. Stimulate production of estrogen and progesterone

  2. Initiate ovulation

  3. Inhibit secretion of pituitary hormones

  4. Stimulate secretion of LH and FSH

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Correct Option: D
Explanation:

Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are called gonadotropins because stimulate the gonads - in males, the testes, and in females, the ovaries. They are not necessary for life but are essential for reproduction. These two hormones are secreted from cells in the anterior pituitary called gonadotrophs. Most gonadotrophs secrete only LH or FSH, but some appear to secrete both hormones.

So the correct option is 'stimulate secretion of LH and FSH'.

Peaks of LH and FSH production occur during

biology coordination hormonal control of menstrual cycle regulation of the menstrual cycle life processes in living organisms- part 2

  1. Flow phase of the menstrual cycle

  2. Follicular phase of the ovarian cycle

  3. Period surrounding ovulation

  4. End of the luteal phase of the ovarian cycle

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Correct Option: C
Explanation:

Menstruation is the shedding of the lining of the uterus (endometrium) accompanied by bleeding. The menstrual cycle is regulated by hormones. Luteinizing hormone and follicle-stimulating hormone, which are produced by the pituitary gland, promote ovulation and stimulate the ovaries to produce estrogen and progesterone. The follicular phase ends when the level of luteinizing hormone increases dramatically (surges). The surge results in the release of the egg (ovulation) and marks the beginning of the next phase.

So the correct option is 'period surrounding ovulation'.

What is the source of increase in concentration of estrogen in the proliferative phase of menstrual cycle?

biology coordination hormonal control of menstrual cycle regulation of the menstrual cycle life processes in living organisms- part 2

  1. Hypothalamus

  2. Anterior pituitary

  3. Ovary

  4. Corpus luteum

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Correct Option: D
Explanation:

  • The estrogen is secreted by the follicles and corpus luteum along with progesterone during the luteal phase of the menstrual cycle in. Its stimulation is done by the LH or luteinizing hormone which is secreted by the anterior pituitary.

So the correct option is 'Corpus luteum'

Neurotransmitters are released at the synapse by ___________

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Tips of Dendrites

  2. Synaptic Knobs

  3. Organelles of Cyton

  4. Myelin sheath of Axon

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Correct Option: A

Which one of the following nerve stimulates gastric glands of secrete gastric juice and promote contractions of smooth muscles of stomach wall?

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Sacral spinal nerve

  2. Vagus nerve

  3. Glassopharyngeal

  4. Lumbar spinal nerve

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Correct Option: A

In reductive amination, the product is?

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. $\alpha$-ketoglutaric acid

  2. Glutamine

  3. Glumate

  4. Alanine

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Correct Option: C

Nerve impulse travel through synapse with the help of?

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Acetylcholine and sympathetin

  2. Choline and acetylcholine

  3. Adrenaline and noradrenaline

  4. None of the above

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Correct Option: A

Nerve impulse takes place with?

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Ventricular systole

  2. Ventricular diastole

  3. Auricular systole

  4. None of these

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Correct Option: A

Synaptic fatigue is due to

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Repeated release of acetylcholine

  2. Repeated release of adrenaline

  3. Exhaustion of neurotransmitter

  4. Exhaustion of acetyl cholinesterase

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Correct Option: C

Membrane potential of a cell forms

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Movement of anions into the cell

  2. Movement of cations into the cell

  3. Action of proton pump

  4. Action of an electrogenic pump.

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Correct Option: B