Lab Midterm Flashcards
Where is the pituitary gland located?
base of brain; below hypothalamus
What hormones does the anterior pituitary gland produce?
- thyroid stimulating hormone(TSH)
- prolactin(PRL)
- follicle stimulating hormone(FSH)
- luteinizing hormone(LH)
- adrenocorticotropic hormone(ACTH)
- growth hormone(GH)
- Oxytocin
- antidiuretic hormone(ADH)
What lobe is responsible for storing hormones?
posterior pituitary gland
What lobe is responsible for producing hormones?
anterior pituitary lobe
Why is the pituitary hormone called the “master gland?”
it controls the function of many other endocrine glands
Where is the thyroid gland located?
base of the neck(butterfly shaped)
Name the three hormones produced by the thyroid gland.
- Triiodothyronine (T3)
- Thyroxine (T4)
- Calcitonin
What effect does the hormone triiodothyronine(T3) have on the body?
controls metabolic rate and oxidation
What effect does the hormone thyroxine(T4) have on the body?
control metabolic rate and oxidation
What effect does the hormone calcitonin have on the body?
decreases calcium levels in blood by stimulating deposition of calcium into the bones
Where is the pancreas located?
behind the stomach
What are the two hormones the pancreas produces that regulate blood sugar levels.
- insulin
- glucagon
What effect does insulin have on the body?
decreases blood sugar by causing cells to take up glucose
What effect does glucagon have on the body?
increases glucose by stimulating the liver to break down glycogen & release glucose into the blood
Where is the parathyroid gland located?
4 pea sized circles found on the thyroid gland
Name a hormone produced by the parathyroid gland.
parathyroid hormone(PTH)
What effect does parathyroid hormone(PTH) have?
increases Ca levels in the blood by increasing secretion from bone & decreasing excretion in the kidneys
Where is the adrenal gland located?
there is one adrenal gland on top of each kidney, making two in total
Name the 3 hormones produced by the cortex(adrenal gland).
- mineralcorticoids
- glucocorticoids
- gonadocorticoids
What effect do mineralocorticoids have on the body?
regulate H2O & electrolyte balance
What effect do glucocorticoids have on the body?
regulate cortisol, cortisone, corticosterone (which increase blood glucose
What effect do gonadocorticoids have on the body?
regulate androgens & some estrogens
Name two hormones produced by the medulla of the adrenal gland, and their effects.
- epinephrine
- norepinephrine
-fight or flight response
What cells are classified as granulocytes?
-neutrophils
-eosinophils
-basophils
What cells are classified as agranulocytes?
-lymphocytes
-monocytes
What is the function of neutrophils?
chemically attracted to inflammation sites and are active phagocytes
What characteristics help identify a neutrophil?
multi lobed nucleus(3-6); pale red/blue cytoplasmic granules
What is the abundance of neutrophils in the blood?
50-70%
What is the abundance of eosinophils in the blood?
2-4%
What is the function of eosinophils?
attacks parasitic worms too large to be phagocytized; play complex role in allergies and asthma
What characteristics help identify eosinophils?
bilobed nucleus; red cytoplasmic granules
What is the abundance of basophils in the blood?
less than 1%
What is the function of basophils?
granules contain histamine, which act as a vasodilator & attracts other WBCs to inflamed site; no direct participation in immune system
What characteristics help identify a basophil?
bilobed nucleus; purplish/black cytoplasmic granules
What is the abundance of lymphocytes in the blood?
25% or more
What is the function of lymphocytes?
associated w lymphoid tissue & play a key role in immunity (B & T lymphocytes)
What characteristics help identify lymphocytes?
nucleus occupies most of cell; blue cytoplasm
What is the abundance of monocytes in the blood?
3-8%
What is the function of monocytes?
active phagocytes against viruses and chronic infection; largest leukocyte
What characteristics help identify monocytes?
u-shaped/kidney shaped nucleus; abundant pale blue cytoplasm
What is the abundance of erythrocytes in the blood?
45%
What is the function of erythrocytes?
gas transport w hemoglobin that carries oxygen in blood; transports ~20% of CO2 from tissues to lungs
What characteristics help identify erythrocytes?
biconcave shape; no nucleus/organelles
Name the hormone that stimulates growth in bones and skeletal muscles.
growth hormone
Calcitonin _______ blood calcium levels while parathyroid hormone _______ blood calcium levels.
decreases; increases
The gonadotropins, which stimulate the gonads, consist of the hormones ______ and ______.
follicle stimulating hormone; luteinizing hormone
Name the hormone that reduces or inhibits urinary output and thereby raises blood pressure.
antidiuretic hormone/vasopressin
This gland and its hormones are involved in the maturation of T-lymphocytes in the immune system.
thymus
______ are chemical messengers that are released directly into the blood to inhibit/stimulate its target organs.
hormones
The endocrine system works in conjunction with the _______ system to influence homeostasis of the body.
nervous
What type of tissue is blood?
connective
Oxygen-rich blood is usually a scarlet color.
true
Blood consists of [a] and [b].
plasma; formed elements
Which condition is a normal homeostatic response to sickness?
leukocytosis
The chemical present in the granules of a basophil is [a].
histamine
Erythrocytes have no nucleus or organelles, therefore they are not true cells.
true
Which blood type(s) can receive type AB blood?
AB
The most abundant leukocyte is the [A] while the least abundant leukocyte is the [B].
neutrophil; basophil
In systemic circulation, arteries carry oxygen-poor blood.
false
In systemic circulation, arteries carry oxygen-poor blood.
false
On the left side of the heart, blood will flow from the left atrium through the _________ valve into the left ventricle. What is the name of this valve?
bicuspid/mitral
Which are the largest veins of the body?
superior/inferior vena cava
The muscular wall of the left ventricle is thicker than the right ventricle.
true
“Lub” is associated with the closing of the [a] valves, and “dup” is associated with the closing of the [b] valves.
atrioventricular; semilunar
The stage of the cardiac cycle during which the ventricles contract is called.
systole
What are the auscultation sounds of the heart?
lub dup
The atria repolarize during the _________ complex.
QRS
What does the QRS complex represent in an EKG?
ventricular depolarization & atrial repolarization
From the AV node, the impulse sweeps to the [a].
AV bundle; bundle of His; atrioventricular bundle
Which blood vessels have valves?
veins
Name the type of arteries that contain a large amount of elastic tissue in their tunica media to withstand pressure fluctuations.
elastic arteries
The largest artery of the body is the [a].
aorta
Blockage of the _______ duct may cause swelling in the right arm.
right lymphatic duct
T cells (T lymphocytes) differentiate in the __________.
thymus
Anemia
condition in which the blood’s oxygen-carrying capacity is too low to support normal metabolism. May result from a decrease in RBCs or decreased hemoglobin content in the RBCs.
Polycythemia
abnormal excess of RBCs that increases blood viscosity
Leukopenia
abnormally low white blood cell count/ below 4000 cells per mmᶟ
Leukocytosis
increased WBCs, over 11,000 cells per microliter, is a normal homeostatic response to an infection in the body
Leukemia
overproduction of abnormal WBCs, accompanied by a reduction in the number of RBCs and platelets
Sickle cell anemia
abnormal hemoglobin, results from a change in one of the 146 amino acids in a beta chain of the globin molecule. Cell becomes irregular shaped and is not able to carry oxygen.
Iron deficiency anemia
inadequate intake of iron-containing foods or impaired iron absorption (iron is a part of hemoglobin)
Coagulation
blood clotting
Hematocrit
percentage of RBCs present in a given volume
Centrifuging
centrifugal force packs down heavier formed elements in a capillary tube, and less dense plasma remains at the top. (In order: plasma, buffy coat (leukocytes and platelets), and erythrocytes at the bottom)
Erythroblastosis fetalis
caused by transplacental transmission of maternal antibodies to the fetal blood. Resulting in hemolysis of the RBCs of the fetus
Antigen
anything that the body perceives as foreign and generate an immune response
Antibodies
preformed antibodies in the plasma that act against RBC carrying antigens that are not on a person’s own RBC and cause clumping