Endocrine Ed

This hormone lowers blood sugar by causing cells to take up sugar from the bloodstream

Insulin

Which hormone will be secreted in the following situation?(current blood sugar, insulin and glucagon) shown on pic

Insulin when red is high

This hormone causes sleepiness and is secreted primarily when it is dark

Melatonin

Why and when is melatonin secreted by the pineal gland

Melatonin helps people sleep and is secreted when it is dark

After adrenaline has had a sufficient effect adrenaline secretion stops. This is an example of

Negative feedback

How does a feedback loop work?

Once a hormone has its effect, the brain will cause the gland to stop making it

Calcitonin is a hormone that lowers blood calcium levels by causing calcium uptake in bones. Parathyroid hormone raises blood calcium levels by causing bones to release calcium into the bloodstream. Based on your understanding of hormones, homeostasis, and feedback loops, which hormone will be released if blood calcium levels are low?

Parathyroid hormone

Think about the concept of negative feedback loops. Which of the following would most likely occur once a hormone has brought the body back into homeostasis?

Secretion of the hormone will be inhibited (slowed or stopped)

What is the role of the brain (especially the hypothalamus) in maintaining homeostasis?

The brain monitors the conditions inside the body The brain makes a gland stop producing a horns one once it has done its job

IN WHICH FOLLOWING Situations would adrenaline Most Likely be Secreted by the adrenaline glands?

When you are being chased by a bear When you are taking a stressful test

ADH helps the body retain water. It does this by causing the kidney to reabsorb more water back into the bloodstream. In which situation with your body most likely produce ADH?

When you are in the Sahara desert in the summer and your canteen has been empty for hours

ADH helps the body retain water. It does this by causing the kidney to reabsorb more water back into the bloodstream. How might ADH secretion be regulated by a negative feedback loop?

ADH secretion will be inhibited when the body has a high concentration water in the blood

This hormone raises heart rate and blood pressure and increases muscle strength during stressful situations

Adrenaline

What would happen if negative feedback did not occur for a hormone?

All of these

What does insulin do?

Both A and B are true Insulin causes cells to take in sugar Insulin causes blood sugar to decrease

What does glucagon do?

Glucagon causes blood sugar to increase

How does glycogen work?

Glucagon causes liver cells to release sugar into the blood

Which hormone will be secreted in the following situation?(current blood sugar, insulin and glucagon) shown on pic

Glucagon when all colors are even

This hormone raises blood sugar by causing glycogen digestion in the liver (which releases sugar into the blood)

Glucogen