I. Increased alertness II. Pupillary dilation III. Raising of hairs

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19.Chemical Coordination and Integration

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$I.$ Increased alertness $II.$ Pupillary dilation $III.$ Raising of hairs $IV.$ Sweating

All of the above written physiological processes are regulated by

Adrenaline

Melatonin

Cortisol

Thymosin

Solution

Adrenal medulla releases two hormones adrenaline and noradrenaline. In the stress conditions, these hormones increase alertness, pupillary dilution, piloerection (raising of hairs), sweating etc. Both of these hormones increase the heart beat. Catecholamines (adrenaline and noradrenaline) also stimulate the breakdown of glycogen resulting in an increased concentration of glucose in blood. In addition they also stimulate the breakdown of lipids and proteins

Standard 11

Biology

If $‘X’$ is a hormone which controls the carbohydrate metabolism in the body and $‘Y’$ is a hormone which controls the secretion of $‘X’$, then $'X’$ and $‘Y’$ are

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Name the three main regions of adrenal cortex.

easy

Norepinephrine

$(i)$ is released by sympathetic fibers

$(ii)$ is released by parasympathetic fibers

$(iii)$ increases the heart rate

$(iv)$ decreases blood pressure.

Which of the above statements are correct ?

medium

(NEET-2013)

Feeling the tremors of an earthquake, a scared resident of seventh floor of a multistoreyed building starts climbing down the stairs rapidly. Which hormone initiates this action?

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The secretion of aldosterone by adrenal cortex is directly controlled by

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(AIIMS-1992)

$I.$ Increased alertness $II.$ Pupillary dilation $III.$ Raising of hairs $IV.$ Sweating All of the above written physiological processes are regulated by

Solution

Similar Questions

If $‘X’$ is a hormone which controls the carbohydrate metabolism in the body and $‘Y’$ is a hormone which controls the secretion of $‘X’$, then $'X’$ and $‘Y’$ are

Name the three main regions of adrenal cortex.

Norepinephrine $(i)$ is released by sympathetic fibers $(ii)$ is released by parasympathetic fibers $(iii)$ increases the heart rate $(iv)$ decreases blood pressure. Which of the above statements are correct ?

Feeling the tremors of an earthquake, a scared resident of seventh floor of a multistoreyed building starts climbing down the stairs rapidly. Which hormone initiates this action?

The secretion of aldosterone by adrenal cortex is directly controlled by

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$I.$ Increased alertness $II.$ Pupillary dilation $III.$ Raising of hairs $IV.$ Sweating

All of the above written physiological processes are regulated by

Norepinephrine

$(i)$ is released by sympathetic fibers

$(ii)$ is released by parasympathetic fibers

$(iii)$ increases the heart rate

$(iv)$ decreases blood pressure.

Which of the above statements are correct ?