Exam 1 Flashcards
Which type of glands are ductless and use the bloodstream to transport production?
Endocrine
Endocrine gland effects are typically _______ acting and _______ lived than those of the nervous system
Slower/Longer
________ and _________ of physiological process via the production of chemicals called __________.
Communication/coordination
hormones
Chemical messengers that influence the activities of other tissues and/or organs.
Hormones
Hormones regulate ________, ______, _________, ______/______ balance.
metabolism, growth, reproduction, water/electrolyte
Two classifications of hormones.
Protein hormones
Steroid hormones
Steroid hormones are produced in ________, _______ and ______.
adrenal cortex, ovaries and testes
Many target tissues/organs
wide-spread effects
Fewer target tissues/organs
limited effects
very specific ______ on the tissue/organ make it the _______.
receptors
target
Hormones bind to very specific receptors like “______ and _____”
Lock and Key
Type of hormone that only activates with receptors on the MEMBRANE.
Protein hormones
________ hormones are ______-based which does not mix well with ______ found in the membrane. So, there are specific receptors in the membrane which activate them.
Protein…. water-based…. Lipids
Second messenger activated after receptor accepts protein hormone
c-AMP
Activation of c-AMP alter _______ activity
enzyme
_______ hormones are cholesterol-based (lipid). So, they pass through the ________ to reach the complimentary receptor in the ________.
Steroid… membrane… nucleus
Steroid hormones reach the complimentary receptors in the nuclei and tell ____/_ ___ to produce the complimentary ______.
DNA/a gene… protein
Negative feedback loop for cortisol:
hypothalamus releases hormone –> pituitary gland releases ACT H –> adrenal cortex produces cortisol.
Biorhythms (and time frame)
Circadian rhythm (1 day) Menstrual Cycle (1 month)
CNS Control (part of brain and a system)
hypothalamus/sympathetic nervous system
The ______ ____ sits in the hypophysial fossa on the skull
Pituitary gland
Pituitary gland consists of two primary parts:
Anterior and Posterior lobe
Third lobe (of pituitary gland) -
FETAL pituitary gland
The pituitary gland sits in the _________ ______ of the skull
Hypophysial Fossa
Anterior Pituitary is composed of _________ tissue.
glandular
Hypothalamus secretes releasing or release-inhibiting hormones that reach the anterior pituitary via the _________ - ________ portal system (origin-destination)
hypothalamic-hypophyseal
The anterior pituitary secretes ___ hormones.
Six
Growth hormone primarily effects ______, _______ and ______ muscle
bones, cartilage and skeletal muscle
Growth hormone increases metabolism which forces the body to use ___ as fuel instead of _____. This raises ______-_____ levels.
fat… sugar… blood-sugar
Hyper secretion of GH during childhood
gigantism
hyper secretion of GH during adulthood
acromegaly
Hypo secretion of GH
Pituitary dwarfism
Target tissue of prolactin
mammary glands
Hormone that stimulates milk production after childbirth
Lactogenic hormone
Tropic hormones (control other glands) - TSH, ACTH, FSH, LH
-Thyroid Stimulating Hormone
-Adrenocorticotropic Hormone (adrenal cortex)
Gonadotropic Hormones:
-Follicle Stimulating Hormone (egg/sperm maturation - gametes)
-Luteinizing Hormone (sex - testosterone/estrogen)
Posterior pituitary composed of _______ tissue.
Nerve
Posterior pituitary is and extension of the _________
hypothalamus
Posterior pituitary is a _______ ____ for the hypothalamus.
storage unit
Posterior pituitary secretes two hormones:
ADH and oxytocin
ADH(?) - target organ
Antidiuretic Hormone
Kidney
Antidiuretic hormone responds to increased blood _________ and decreased blood _____
concentration… volume
Antidiuretic hormone _______ water by decreasing ______ ______.
conserves….. urine volume
Lack of Antidiuretic hormone secretion
diabetes insipidus (excess urination)
Oxytocin target organs
uterus and mammary glands
“Bonding” hormone
Oxytocin
MSH(?) and function
Melanocyte-stimulating hormone - causes skin to darken
POMC
Pro-opiomelanocortin
Located in the anterior neck (two lobes)
Thyroid gland (right and left lobes)
Thyroid is made of two cell types
Follicular cells (larger) Parafollicular (smaller)
Two hormones secreted by follicular cells of thyroid(?) and function
T3 - Triiodothyronine
T4 - Tetraiodothyronine
Regulate metabolism
Disorders of T3/T4 secretion: (decreased secretion)
Hypothyroidism:
Adults - Myxedema ( decreased metabolism, peristalsis, temp. and thickened skin
Infants - Cretinism (failure to develop physically and mentally)
Disorders of T3/T4 secretion: (increased secretion)
Hyperthyroidism: Graves disease (increased metabolism, heart rate, peristalsis, temp and exophthalmia
Exophthalmia
protruding eyes
_____ required to produce T3/T4. Deficiency of this may cause development of ______
Iodine
Goiter
The secretion of the thyroid gland is regulated by the __________. (______ –> ______–> _______–>______)
Hypothalamus
hypothalamus secretes releasing hormone –> stimulate pituitary to secrete TSH –> stimulates thyroid to produce T3/T4 –> Levels maintained via negative feedback
Hormone secreted by parafollicular cells of thyroid.
Calcitonin
Function of calcitonin
regulate blood-calcium levels
Four smaller glands located on posterior of thyroid gland (PTH)
parathyroid glands (parathyroid hormone)
Target organs of PTH
bone, digestive tract and kidneys
PTH increases _____ _______ in three ways:
Blood calcium
- Stimulates osteoclasts
- Stimulates kidneys to reabsorb calcium from urine
- Increases absorption of calcium by digestive tract
Hypocalcemia (symptoms)
Tetany (sustained muscle spasms)
Hypercalcemia symptoms
Kidney stones and depressed cardiac/GI activity
“Suprarenal” glands(?) located above _______
Adrenal glands
Kidneys
Two regions of adrenal glands
Inner adrenal medulla
Outer adrenal cortex
Adrenal medulla secretes ___________ (_______ / ________)
catecholamines
epinephrine/norepinephrine
Catecholamines (epinephrine/norepinephrine) are ones “________ or _______” hormones
Fight or Flight
Adrenal cortex secretes _______ hormones.
three hormones “….oids”
Steroid hormones:
Glucocorticoids
Mineralcorticoids
Sex hormones
Glucocorticoids (three) functions
Increase blood pressure
cortisol - secreted during times of stress
control - hypothalamus –> Ant. Pituitary (ACTH) –> adrenal cortex –> negative feedback
Mineralcorticoids (two) functions
Aldosterone - reabsorption of sodium and water
Involved in regulation of blood volume and BP
Sex hormones (two)
androgens and estrogens
(one) disorder of adrenal medulla
Pheochromocytoma - hyper secretion of epinephrine and norepinephrine
(two) disorders of adrenal cortex
Hypo secretion of cortisol - Addison’s disease (muscle atrophy, bronzing of skin and fluid loss (JFK had this))
Hyper secretion of cortisol - Cushing’s syndrome (moon face, buffalo hump)
The _______ is both an ________ and ________ gland.
Pancreas… endocrine… exocrine
Pancreas secretes two hormones from ______ of _________.
Islets of Langerhans
Two hormones secreted by pancreas
Insulin and Glucagon
Disorder - insulin dependent/juvenile
Type 1 diabetes mellitus
Disorder - not insulin dependent/adult
Type 2 diabetes mellitus
Three symptoms of diabetes mellitus (three “polys)
Polydipsia (excess thirst)
Polyuria (excess urine)
Polyphagia (excessive hunger)
Function of glucagon
Increase blood glucose
Glucagon increase blood glucose by two processes.
Gluconeogenesis - stimulates conversion of proteins to glucose
Stimulates conversion of glycogen to glucose in liver
Gonads (endocrine glands)
Ovaries - estrogens and progesterone
Testes - testosterone
Thymosins are produced in the _____ gland and are an _______ response.
Thymus
Immune
“Pinecone shaped” gland that produces ________ which makes you sleepy.
Pineal Gland (pie-neal) Melatonin
Other hormones:
Cholecystokinin, Gastrin - secreted by ___ ___
Erythropoietin - secreted by ___ _______
Prostaglandins - _______ _______
digestive tract
RBC production
inflammatory process
Three functions of blood
Transport
Regulation
Protection
Blood is ______ tissue with an average pH level of .
connective… 7.4
Two basic components of blood and % of make up
plasma 55% and blood cells (formed elements) 45%
______ make-up:
straw colored, mostly water, contains clotting proteins, ion, nutrients, gases, waste
Plasma
Make up the majority of bloods cells
Erythrocytes (RBCs)
“Buffy coat” of blood cells (two parts)
Leukocytes (WBCs)
Thrombocytes (platelets)
The percentage of RBCs in a sample of blood
Hematocrit
Erythrocytes (RBCs), Leukocytes (WBCs and Thrombocytes (platelets) produced in ___ ____ ______ and _______ ______
red bone marrow (primarily flat bones)
lymphoid tissue
Myelosuppression
decreased production of blood cells
Decreased production of RBCs
Anemia
Decreased production of WBCs
Leukopenia
Decreased production of thrombocytes
Thrombocytopenia
Polycythemia
Increased production of blood cells
Immature RBCs
Reticulocytes
_______ transport oxygen and CO2
Hemoglobin
Require iron, vitamin B12, folic acid and protein
hemoglobin
Erythropoietin (EPO) secreted by ______, stimulated by decreased ______ _____ level. It increases ___ production
Kidney
blood oxygen
RBC
Disease that may result in polycythemia
Emphysema - lack of oxygen in the blood triggers the production of RBCs
Worn RBCs are destroyed by ________ in the ______.
macrophages
spleen
Global gets broken down to ____ ____.
amino acids
Heme is broken down to ____ and ____ ______ (bilirubin)
iron
bile pigments
____ gets stored in the liver and ________ is excreted
Iron
bilirubin
Yellowing of the skin due to excess bilirubin in blood
Jaundice
_,000 - __,000 leukocytes (WBCs)/ microliter of blood.
5,000 - 10,000
Primary function of leukocytes
defense and phagocytosis
Five types of WBCs
(3 granulocytes “phils”)
(2 agranulocytes “cytes”)
Granulocytes: Neutrophils Basophils Eosinophils Agranulocytes: Lymphocytes Monocytes
_____phils make up 55-70% of WBCs
Nuetrophils
____phils (dark blue) make up less than 1% of WBCs and help with inflammation
Basophils
____phils make up 1-3% of WBCs and help with parastic infection and allergies
Eosinophils
____cytes make up 25-38% of WBCs and are part of immune response
Lymphocytes
____cytes make up 3-8% of WBCs and consists of phagocytes that differentiate into macrophages
Monocytes
Nemonic for five types of WBCs
Naughty Little Monkeys Eat Bananas (most to least abundant)
Function of platelets
blood clotting
Complete Blood Count (CBC)
RBCs: hemoglobin, hematocrit, reticulocytes
WBCs: % of each type of WBC
Prevention of blood loss
hemostasis
Three part process of hemostasis
Vasospasm, platelet plug, blood clot
Contraction of smooth muscle in vein or artery to stop excessive blood loss
Vasospasm
Platelets become sticky - _______ ____.
This activates ______ factors.
Platelet Plug
clotting
Activated clotting factors produce PTA
Prothrombin Activator
PTFF
Prothrombin (+calcium and PTA) –>
Thrombin (activates) –>
Fibrinogen (which forms) –>
Fibrin (net)
A blood clot
Thrombus
A traveling clot
Embolus
Process of getting rid of a clot.
Fibrinolysis
TPA (clot buster)
Tissue Plasminogen Activator
Plasminogen –> (activated by ___) –> _______ –> clot dissolved
TPA –> Plasmin
Agglutination
Clumping as a result of antigen-antibody interaction
Hemolysis
Destruction of blood cells
Hemolysis leads to ______ _____ and, ultimately, _____.
Kidney failure
Death