Bio 151 Exam 3 UW Madison |2025-2026 Update
Comprehensive Frequently Tested Questions And Verified
Answers |100% Accurate Answers | Already Graded A+
1. Testosterone negatively regulates the
Which 2 negative feedback
hypothalamus' and ap's release of GnRH, FSH, LH
loops control sex horomone
2. Inhibin negatively regulates ap's secretion of FSH
production in male?
Difference between Negative regulates and inhibits and original stimulus=
negative and positive returns it to the original state Positive reinforces a
feedback? stimulus and leads to a greater response
How does the Increasing the temperature in the hypo causes a decrease in the
hympolthalamus regulate rest of the body
body temperature?
Ingestion happens where and Oral cavity, uses salivary glands
does what
Breaks down food for the body to absorb
1. Mechanical digestion (mouth chewing and amylase and stomach
Digestion happens where and peristalsis)
does what 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 The duodenum in the small intestine absorbs amino acids and
sugars
Takes undigested materials out and uses accessory glands to
secrete digestive juices
Elimination 1. Salivary glands
2. Pancreas
3. Liver and gall bladder
Acid hydrolysis happens Stomach only, the unfolding of proteins so that enzymes can
where attack
Enzyme hydrolysis happens Mouth, stomach, small intestine and its just breaking food
where molecules down
What does the pancreas Bicarbonate enzymes to neutralize
release?
What does the liver produce? Bile into gall bladder
, What does the gall bladder Puts bile into the small intestine
do?
What does the pyloric Squirts acid chyme into the duodenum of small intestine
sphincter do?
What does peristalsis do? Turns food into liquefied acid chyme
What causes the vagal Thinking and tasting food
nerve in the PNS to
activate?
In gastric pits
Where is the vagal nerve Releases:
and what happens when 1. Gastrin-releasing peptide onto G cells, parietal, and chief
2. Acetylcholine onto ECL
it is activated?
It binds to GRP receptors on G cells and stimulates the
When GRP is released, what
happens? release of the hormone Gastrin into systemic blood
circulation
It binds to mAcHR on ECL cells, when then stimulates
When AcH is released, what
happens? the release of histamine into extracellular fluid, which
stimulates the chief and parietal cells
3 types of gastric pit cell types:
After gastrin is released into 2. Parietal cells= H+ and Cl- ions into gastric pit
the blood, where does it lumen= proteins and pepsinogen denatured
bind? 3. Chief cells= release of pepsinogen into gastric pit
lumen= unravelled pepsinogen cleaves into active
pepsin to cleave proteins
What do Goblet cells do to Release protective mucus constantly
prevent an attack on the
stomach's epithelial cells?
Comprehensive Frequently Tested Questions And Verified
Answers |100% Accurate Answers | Already Graded A+
1. Testosterone negatively regulates the
Which 2 negative feedback
hypothalamus' and ap's release of GnRH, FSH, LH
loops control sex horomone
2. Inhibin negatively regulates ap's secretion of FSH
production in male?
Difference between Negative regulates and inhibits and original stimulus=
negative and positive returns it to the original state Positive reinforces a
feedback? stimulus and leads to a greater response
How does the Increasing the temperature in the hypo causes a decrease in the
hympolthalamus regulate rest of the body
body temperature?
Ingestion happens where and Oral cavity, uses salivary glands
does what
Breaks down food for the body to absorb
1. Mechanical digestion (mouth chewing and amylase and stomach
Digestion happens where and peristalsis)
does what 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 The duodenum in the small intestine absorbs amino acids and
sugars
Takes undigested materials out and uses accessory glands to
secrete digestive juices
Elimination 1. Salivary glands
2. Pancreas
3. Liver and gall bladder
Acid hydrolysis happens Stomach only, the unfolding of proteins so that enzymes can
where attack
Enzyme hydrolysis happens Mouth, stomach, small intestine and its just breaking food
where molecules down
What does the pancreas Bicarbonate enzymes to neutralize
release?
What does the liver produce? Bile into gall bladder
, What does the gall bladder Puts bile into the small intestine
do?
What does the pyloric Squirts acid chyme into the duodenum of small intestine
sphincter do?
What does peristalsis do? Turns food into liquefied acid chyme
What causes the vagal Thinking and tasting food
nerve in the PNS to
activate?
In gastric pits
Where is the vagal nerve Releases:
and what happens when 1. Gastrin-releasing peptide onto G cells, parietal, and chief
2. Acetylcholine onto ECL
it is activated?
It binds to GRP receptors on G cells and stimulates the
When GRP is released, what
happens? release of the hormone Gastrin into systemic blood
circulation
It binds to mAcHR on ECL cells, when then stimulates
When AcH is released, what
happens? the release of histamine into extracellular fluid, which
stimulates the chief and parietal cells
3 types of gastric pit cell types:
After gastrin is released into 2. Parietal cells= H+ and Cl- ions into gastric pit
the blood, where does it lumen= proteins and pepsinogen denatured
bind? 3. Chief cells= release of pepsinogen into gastric pit
lumen= unravelled pepsinogen cleaves into active
pepsin to cleave proteins
What do Goblet cells do to Release protective mucus constantly
prevent an attack on the
stomach's epithelial cells?
