Bio 151 Final Exam 3 UW Madison
Questions and All Correct Answers
2025-2026 Edition.
What is necessary in maintaining homeostasis? - Answer Negative feedback
Hormones - Answer Chemicals made by tissues to get secreted in the blood and act on other
tissues
How are testosterone levels regulated? - Answer Negative feedback using a hormonal
response to change the levels
What does almost all of the physiological control? - Answer The hypothalamus talking to the
pituitary
What regulates the anterior pituitary? - Answer GnRH in both males and females (increase in
GnRH causes the A pituitary to be stimulated)
What does the A pituitary release? - Answer LH and FSH
When the A pituitary releases LH, where does it go? - Answer Into systemic circulation, and
then into the Leydig cells in the testes to stimulate testosterone to stimulate spermatogenisis
and stimulates ovulation by turning the dominant follicle into the corpus luteum to produce
progesterone
What do the Testes release when their leydig cells are activated? - Answer Testosterone into
circulation and into the testes to create the male germ cells
When testosterone is released into circulation, where does it go? - Answer Back to the
androgen receptors in the hypothalamus to turn off production of GnRH (negative feedback)
What is the ranking for using up stored energy? - Answer Glucogen in the liver is first, then in
muscle cells, and then fat cells
, What happens if blood glucose levels are high vs low? - Answer High: Insulin secreted so that
glucose is taken out of the blood and into the rest of the body
Low: Glucagon secreted to release glucose into the blood from the liver
What does the pancreas produce and with which cells? - Answer Alpha: glucose
Beta: Insulin
Which 2 negative feedback loops control sex horomone production in male? - Answer 1.
Testosterone negatively regulates the hypothalamus' and ap's release of GnRH, FSH, LH
2. Inhibin negatively regulates ap's secretion of FSH
Difference between negative and positive feedback? - Answer Negative regulates and inhibits
and original stimulus= returns it to the original state
Positive reinforces a stimulus and leads to a greater response
How does the hympolthalamus regulate body temperature? - Answer Increasing the
temperature in the hypo causes a decrease in the rest of the body
Ingestion happens where and does what - Answer Oral cavity, uses salivary glands
Digestion happens where and does what - Answer Breaks down food for the body to absorb
1. Mechanical digestion (mouth chewing and amylase and stomach peristalsis)
2. Chemical digestion: processes food and uses acid hydrolysis to break food down, mainly
proteins (stomach using chyme)
Majority of digestion happens in small intestine
Absorption - Answer The duodenum in the small intestine absorbs amino acids and sugars
Elimination - Answer Takes undigested materials out and uses accessory glands to secrete
digestive juices
1. Salivary glands
2. Pancreas
3. Liver and gall bladder
Questions and All Correct Answers
2025-2026 Edition.
What is necessary in maintaining homeostasis? - Answer Negative feedback
Hormones - Answer Chemicals made by tissues to get secreted in the blood and act on other
tissues
How are testosterone levels regulated? - Answer Negative feedback using a hormonal
response to change the levels
What does almost all of the physiological control? - Answer The hypothalamus talking to the
pituitary
What regulates the anterior pituitary? - Answer GnRH in both males and females (increase in
GnRH causes the A pituitary to be stimulated)
What does the A pituitary release? - Answer LH and FSH
When the A pituitary releases LH, where does it go? - Answer Into systemic circulation, and
then into the Leydig cells in the testes to stimulate testosterone to stimulate spermatogenisis
and stimulates ovulation by turning the dominant follicle into the corpus luteum to produce
progesterone
What do the Testes release when their leydig cells are activated? - Answer Testosterone into
circulation and into the testes to create the male germ cells
When testosterone is released into circulation, where does it go? - Answer Back to the
androgen receptors in the hypothalamus to turn off production of GnRH (negative feedback)
What is the ranking for using up stored energy? - Answer Glucogen in the liver is first, then in
muscle cells, and then fat cells
, What happens if blood glucose levels are high vs low? - Answer High: Insulin secreted so that
glucose is taken out of the blood and into the rest of the body
Low: Glucagon secreted to release glucose into the blood from the liver
What does the pancreas produce and with which cells? - Answer Alpha: glucose
Beta: Insulin
Which 2 negative feedback loops control sex horomone production in male? - Answer 1.
Testosterone negatively regulates the hypothalamus' and ap's release of GnRH, FSH, LH
2. Inhibin negatively regulates ap's secretion of FSH
Difference between negative and positive feedback? - Answer Negative regulates and inhibits
and original stimulus= returns it to the original state
Positive reinforces a stimulus and leads to a greater response
How does the hympolthalamus regulate body temperature? - Answer Increasing the
temperature in the hypo causes a decrease in the rest of the body
Ingestion happens where and does what - Answer Oral cavity, uses salivary glands
Digestion happens where and does what - Answer Breaks down food for the body to absorb
1. Mechanical digestion (mouth chewing and amylase and stomach peristalsis)
2. Chemical digestion: processes food and uses acid hydrolysis to break food down, mainly
proteins (stomach using chyme)
Majority of digestion happens in small intestine
Absorption - Answer The duodenum in the small intestine absorbs amino acids and sugars
Elimination - Answer Takes undigested materials out and uses accessory glands to secrete
digestive juices
1. Salivary glands
2. Pancreas
3. Liver and gall bladder
