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(D) When a person is exposed to a cold environment,the body initiates several thermoregulatory mechanisms to maintain homeostasis. $1$. Shivering is a

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Increased heart rate and stroke volume

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(D) When a person is exposed to a cold environment,the body initiates several thermoregulatory mechanisms to maintain homeostasis. $1$. Shivering is a rapid contraction and relaxation of skeletal muscles to generate heat. $2$. Vasoconstriction reduces blood flow to the skin to minimize heat loss. $3$. The hypothalamus triggers the release of thyroid hormones (thyroxine) and adrenal medulla hormones (epinephrine/norepinephrine) to increase the metabolic rate and heat production. $4$. Heart rate and stroke volume generally increase to support metabolic demands,but they are not primary thermoregulatory responses that a person 'cannot' exhibit; rather,they are physiological adjustments. However,in the context of standard physiological questions regarding thermoregulation,all these are typical responses. If the question implies a physiological impossibility,it is often noted that the body cannot 'stop' these responses voluntarily. Given the options,all are standard responses to cold stress.

Column $I$	Column $II$
$i$. Oxytocin	$a$. Adrenal medulla
$ii$. Melatonin	$b$. Thyroid gland
$iii$. Catecholamines	$c$. Pineal gland
$iv$. Calcitonin	$d$. Hypothalamus

$A$ person placed in a cold environment cannot exhibit which of the following?

Similar Questions

Which of the following pairs is correctly matched regarding the hormone and its associated disorder?

Diagrammatically indicate the location of the various endocrine glands in our body.

Which of the following is the correct match for the hormone and its associated organ?

Match the hormones given in Column $I$ with their source gland in Column $II$.
Column $I$ Column $II$
$i$. Oxytocin $a$. Adrenal medulla
$ii$. Melatonin $b$. Thyroid gland
$iii$. Catecholamines $c$. Pineal gland
$iv$. Calcitonin $d$. Hypothalamus

Choose the correct option from below:

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