Crazy question in biology

[kaelalden]

See if you understand this. Maybe quite interesting to some people. I'm taking Anatomy and Physiology.
here is a question

Which of these will decrease the release of growth hormone?
A) high protein diet

B) GRH

C) low SS levels

D) poor nutrition

(A) is the correct answer.
Feedback: High levels of protein in the blood can inhibit GH by a negative feedback mechanism; although this seems ironic, low protein levels will actually increase the release of GH. :eek:



I believe this was another question that people were debating

The following are true of insulin except which one?

A) can cause hypoglycemia

B) can cause hyperglycemia

C) produced in the islets of Langerhans

D) antagonized by glucagon
(B) was the correct answer
Feedback: Insulin lowers blood glucose and could cause hypoglycemia if in excess.

[Alin]

Those will make you think.

[arnold jr]

Can you elaborate on these topics a little more?

Arnold jr.

[Kaiser]

Pretty good stuff.

[kaelalden]

Can you elaborate on these topics a little more?

Arnold jr.

Growth hormone (gh), which is also called somatotropin (STH), is a protein that stimulates cells to enlarge and more rapidly divide. GH is secreted in pulses, especially during sleep. Two biochemicals from the hypothalamus control its secretion. They are released alternately, exerting opposite effects. Growth hormone-releasing hormone (GHRH) stimulates secretion of Gh, and somatostatin (SS) inhibits secretion. Nutritional state seems to play a role in control of GH. For example, more GH is released during periods of protein deficiency and abnormally low blood glucose concentration. Conversely, when blood protein and glucose concentrations increase, growth hormone secretion decreases.

No need to deprive yourself of protein unless your epiphyseal plates have not closed. In that case, you would be a child probably under the age of 18-20. The last epiphyseal plate that closes is the sternum and that is at age 25.
Also, hGH half-life is 30-45 minutes.

source:
Hole's Human Anatomy & Physiology - Tenth Edition
Chapter 13 page 480