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Homeostasis and Thermoregulation in Humans

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Homeostasis and Thermoregulation in Humans

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Questions and Answers

What is the primary function of homeostasis in organisms?

To adapt to changing external environments

To respond to stimuli

To regulate external environments

To maintain a constant internal balance (correct)

What is the region of the brain responsible for controlling thermoregulation in mammals?

Hypothalamus (correct)

Adrenal gland

Pituitary gland

Thyroid gland

What type of hormones are catecholamines and thyroid hormones classified as?

Peptides and proteins

Steroids

Amino acid derivatives (correct)

Lipophilic hormones

What is the characteristic of lipophilic hormones?

They are lipophilic and lipid-soluble Signup and view all the answers

What is the function of hormones in the endocrine system?

To act as regulatory chemicals Signup and view all the answers

What is the term for the process by which the body regulates its temperature?

Thermoregulation Signup and view all the answers

What is the characteristic of hydrophilic hormones?

Freely soluble in blood Signup and view all the answers

Which part of the pituitary gland is of epithelial tissue in origin?

Anterior pituitary Signup and view all the answers

What is the function of releasing hormones from the hypothalamus?

Stimulate the secretion of specific anterior pituitary hormones Signup and view all the answers

What is the mechanism that maintains proper levels of the target cell hormone?

Negative feedback or feedback inhibition Signup and view all the answers

What is the characteristic of the posterior pituitary?

It contains axons that originate in the hypothalamus Signup and view all the answers

How many capillary beds are present in the hypothalamohypophyseal portal system?

Two Signup and view all the answers

Where are the neuron cell bodies that produce antidiuretic hormone and oxytocin located?

Hypothalamus Signup and view all the answers

What is the effect of antidiuretic hormone on the kidney?

Increased water reabsorption Signup and view all the answers

What is the role of oxytocin in mammals?

Stimulation of milk ejection and uterine contractions Signup and view all the answers

What is the response of the pancreas to the release of acidic stomach contents into the duodenum?

Increase in pH levels Signup and view all the answers

What is the function of secretin in the digestive system?

Neutralization of acidic stomach contents Signup and view all the answers

What is the dual function of the pancreas in the body?

Endocrine and exocrine Signup and view all the answers