BIO201L Lab 9 The Endocrine System
Student Name: Hayley Proper
Access Code (located on the lid of your lab kit): AC-S1UH84M
Pre-Lab Questions
?What is the function of the endocrine system .1
.Its function is to secrete hormones throughout the body
.Research two types of hormones and describe the mode of action for each .2
adrenaline - once secreted from the brain it puts the body into a fight or flight mode. Its (1
mode of action is the alpha adrenergic receptors. 2) melatonin - this hormones has day and
.night cycles and its mode of action is in the MT 1 and MT 2 receptors
?Which gland is both endocrine and exocrine .3
The pancreas is both
?Which hormones control the fight or flight response .4
.Adrenaline is the fight or flight response
?What is type 1 diabetes and what is the treatment for this disease .5
Type 1 diabetes is when the body can’t produce enough insulin and the body usually always has
a high blood glucose levels unless they treat it with daily injections of insulin while maintaining
.a healthy diet
.Describe how Ca2+ levels in the blood are regulated by hormones .6
They are regulated by the parathyroid hormone which is secreted when calcium levels in the
.body become way too high
?How do the nervous and endocrine systems work together to maintain homeostasis of the body .7
Once the nervous system detects abnormal activity in the body, it sends a signal to the endocrine system
.to balance the bodies homeostasis
Experiment 1: Microscopic Anatomy of the Endocrine System
Table 2: Experiment 1 Image Observations
, BIO201L Lab 9 The Endocrine System
The cells in the thyroid gland are tightly packed in together and each cell
Thyroid Gland
is lined with follicular cells
The cells in the parathyroid gland are all very loose and differ in sizes Parathyroid Gland
The cells in the pancreas are tightly packed together and in the areas that
Pancreas
are a bit more open, have interlobular ducts
The cells in the adrenal gland are long and thin rectangle shaped that are
tightly packed together and have zone fasciculate rows of vacuolated Adrenal Gland
appearance
The cells in the pituitary gland are again packed closely together but it seems to
all be in rows. There is the posterior pituitary, pars intermedia, and the anterior Pituitary Gland
.pituitary
In the last “row” of the pituitary gland they magnified the anterior pituitary
Anterior Pituitary
gland even closer to see that the cells look an uneven circle with vascular canals
Gland
connecting them to other cells
Post-Lab Questions
.Label the items in the following slide images based on your observations .1
A- Colloid
B- Follicular cells
Student Name: Hayley Proper
Access Code (located on the lid of your lab kit): AC-S1UH84M
Pre-Lab Questions
?What is the function of the endocrine system .1
.Its function is to secrete hormones throughout the body
.Research two types of hormones and describe the mode of action for each .2
adrenaline - once secreted from the brain it puts the body into a fight or flight mode. Its (1
mode of action is the alpha adrenergic receptors. 2) melatonin - this hormones has day and
.night cycles and its mode of action is in the MT 1 and MT 2 receptors
?Which gland is both endocrine and exocrine .3
The pancreas is both
?Which hormones control the fight or flight response .4
.Adrenaline is the fight or flight response
?What is type 1 diabetes and what is the treatment for this disease .5
Type 1 diabetes is when the body can’t produce enough insulin and the body usually always has
a high blood glucose levels unless they treat it with daily injections of insulin while maintaining
.a healthy diet
.Describe how Ca2+ levels in the blood are regulated by hormones .6
They are regulated by the parathyroid hormone which is secreted when calcium levels in the
.body become way too high
?How do the nervous and endocrine systems work together to maintain homeostasis of the body .7
Once the nervous system detects abnormal activity in the body, it sends a signal to the endocrine system
.to balance the bodies homeostasis
Experiment 1: Microscopic Anatomy of the Endocrine System
Table 2: Experiment 1 Image Observations
, BIO201L Lab 9 The Endocrine System
The cells in the thyroid gland are tightly packed in together and each cell
Thyroid Gland
is lined with follicular cells
The cells in the parathyroid gland are all very loose and differ in sizes Parathyroid Gland
The cells in the pancreas are tightly packed together and in the areas that
Pancreas
are a bit more open, have interlobular ducts
The cells in the adrenal gland are long and thin rectangle shaped that are
tightly packed together and have zone fasciculate rows of vacuolated Adrenal Gland
appearance
The cells in the pituitary gland are again packed closely together but it seems to
all be in rows. There is the posterior pituitary, pars intermedia, and the anterior Pituitary Gland
.pituitary
In the last “row” of the pituitary gland they magnified the anterior pituitary
Anterior Pituitary
gland even closer to see that the cells look an uneven circle with vascular canals
Gland
connecting them to other cells
Post-Lab Questions
.Label the items in the following slide images based on your observations .1
A- Colloid
B- Follicular cells
