HUBS1416 Exam Questions With Complete Solutions
Where is Gastrin secreted
stomach
What is the function of Gastrin
Stimulates stomach activity
What does CCK stand for
cholecystokinin
Where is CCK secreted
small intestine
What is the function of CCK
Stimulates secretion of pancreatic enzymes, contraction of
gallbladder & inhibits gastric emptying
Where is secretin secreted
Small intestine (if material entering SI is acidic)
What is the function of secretin
Stimulates the secretion of HCO3- (bicarbonate)
Where is Insulin secreted from
beta cells of pancreas
,What is the function of insulin
- Stimulates storage of glucose in liver and muscle tissue
- Stimulates reuptake of glucose when blood sugar is high -
lowering blood sugar
Where is Glucagon secreted
alpha cells of pancreas
What is the function of Glucagon
Stimulates release of glucose from liver when blood sugar is
low, raising blood sugar levels
How is leptin produced
Produced by adipose (fat) tissue
What does Leptin do
Suppresses appetite as it's levels increase
What happens to leptin levels when body fat decreases
levels fall and appetite increases
What secretes hormone PYY (peptide YY)
Secreted by the small intestines after a meal
What does hormone PYY do
Acts as an appetite suppressant that counters the appetite
stimulant ghrelin
,Do obese people have high or low levels of PYY
Obese people have low levels (can't be given orally - its a
protein)
What does Insulin do to appetite
suppresses appetite
Where is Ghrelin secreted
Secreted by the stomach
What does ghrelin do
Appetite stimulant, triggers feelings of hunger as mealtime
approaches
what happens to ghrelin levels in dieters who lose weight
levels fall
What problems can be increased due to diabetes
- coronary heart disease
- Hypetension
- Gallstones
- Cancer
- Diabetes mellitus
- Heart failure
What factors affect metabolic rate
, - Decrease with age & decrease with starvation
- increase with increasing activity, temperature, thyroid hormone
level, stress, anxiety and in pregnancy
- Faster in men and in larger people
What does metabolism provide energy for
- Homeostasis
- Growth, maintenance and repair
- Secretion and contraction
What are anabolic reactions
Building up of substances from simple to complex
Do anabolic reactions require energy input
Yes
What is an example of an anabolic reaction
amino acid monomers are bound together in a reaction to form
protein polymers
What is a catabolic reaction
Decomposition of a complex substance to a simpler substance.
These actions release energy
What is an example of a catabolic reaction
Glycogen stored in the liver, becomes glucose when energy is
needed
Where is Gastrin secreted
stomach
What is the function of Gastrin
Stimulates stomach activity
What does CCK stand for
cholecystokinin
Where is CCK secreted
small intestine
What is the function of CCK
Stimulates secretion of pancreatic enzymes, contraction of
gallbladder & inhibits gastric emptying
Where is secretin secreted
Small intestine (if material entering SI is acidic)
What is the function of secretin
Stimulates the secretion of HCO3- (bicarbonate)
Where is Insulin secreted from
beta cells of pancreas
,What is the function of insulin
- Stimulates storage of glucose in liver and muscle tissue
- Stimulates reuptake of glucose when blood sugar is high -
lowering blood sugar
Where is Glucagon secreted
alpha cells of pancreas
What is the function of Glucagon
Stimulates release of glucose from liver when blood sugar is
low, raising blood sugar levels
How is leptin produced
Produced by adipose (fat) tissue
What does Leptin do
Suppresses appetite as it's levels increase
What happens to leptin levels when body fat decreases
levels fall and appetite increases
What secretes hormone PYY (peptide YY)
Secreted by the small intestines after a meal
What does hormone PYY do
Acts as an appetite suppressant that counters the appetite
stimulant ghrelin
,Do obese people have high or low levels of PYY
Obese people have low levels (can't be given orally - its a
protein)
What does Insulin do to appetite
suppresses appetite
Where is Ghrelin secreted
Secreted by the stomach
What does ghrelin do
Appetite stimulant, triggers feelings of hunger as mealtime
approaches
what happens to ghrelin levels in dieters who lose weight
levels fall
What problems can be increased due to diabetes
- coronary heart disease
- Hypetension
- Gallstones
- Cancer
- Diabetes mellitus
- Heart failure
What factors affect metabolic rate
, - Decrease with age & decrease with starvation
- increase with increasing activity, temperature, thyroid hormone
level, stress, anxiety and in pregnancy
- Faster in men and in larger people
What does metabolism provide energy for
- Homeostasis
- Growth, maintenance and repair
- Secretion and contraction
What are anabolic reactions
Building up of substances from simple to complex
Do anabolic reactions require energy input
Yes
What is an example of an anabolic reaction
amino acid monomers are bound together in a reaction to form
protein polymers
What is a catabolic reaction
Decomposition of a complex substance to a simpler substance.
These actions release energy
What is an example of a catabolic reaction
Glycogen stored in the liver, becomes glucose when energy is
needed
