Controlled by the sympathetic nervous system and release epinephrine and norepinephrine.
One of the hormones that stimulates breast develop- ment and promotes and maintains lactation after child- birth.
A hormone produced in the adrenal cortex that enables the body to resist long term stress.
Virtually all of the protein or amino acid-based hormones exert their effects through intracellular:
Sometimes prolonged excessive exposure to high hormone concentrations causes a phenomenon known as:
The neurohypophysis or posterior lobe of the pituitary gland is not a true endocrine gland because:
It is only a hormone storage area that receives hormones from the hypothalamus for release
Steroid hormones exert their action by:
Entering the nucleus of a cell and initiating or altering the expression of a gene
The second-messenger mechanism of hormone action operates by:
Binding to specific receptors and employing the services of G proteins and cAMP
Thyroid hormone (a small iodinated amine) enters target cells in a manner similar to:
Steroid hormones, because both diffuse easily in to target cells
In circumstances where the body requires prolonged or increased levels of a hormone, the DNA of target cells will specify the synthesis of more receptors on the surface of the cells of the target organ. This is known as:
Thyroxine does not require __ to effect a response.
It does not require a second messenger to effect a response
Glucocorticoids enable the body to deal appropriately with stress. They accomplish this by:
Increasing blood glucose, fatty acid, and amino acid levels and enhancing blood pressure
Catecholamines and/or peptide hormones bind to receptors on the surface of cells that comprise target organs. This binding causes:
Adenylate cyclase to generate cyclic AMP from ATP.
The major group of leukocytes that contain no observable cytoplasmic granules and are more abundant in lymphoid tissue and lymph.
An insoluable compound that forms a meshwork of strands that trap RBC's and is, therefore, considered the structural basis of clot formation.
The ability of leukocytes to move in and out of blood vessels in order to reach sites of inflammation or tissue destruction.
Nucleated cells that are formed in the bone marrow whose numbers average from 4,000 to 11,000 per uL of blood.
Anucleocyte (without a nucleus) cells, when mature, whose numbers average 4.5 to 5.0 million per uL of blood.
You are given a capillary tube containing uncentrifuged blood and told to determine the patient's hematocrit. The original column height before centrifuging is 50 mm. After spinning, the bottom layer of the capillary tube containing cells is 20 mm and the top layer containing plasma is 30 mm. What is the patient's hematocrit value?
Also called reduced hemoglobin, this is the form of hemoglobin that results after oxygen diffuses into the blood.
This type of leukocyte is present in high amounts in the blood when a patient has a parasitic infection.
Place the following in correct developmental sequence:
4. late erythroblast
2, 4, 3, 1
A lack of intrinsic factor, leading to a deficiency of vitamin B12 and large pale cells called macrocytes, is characteristic of:
Which sequence is correct for the following events?
1. fibrinogen ® fibrin
2. clot retraction
3. formation of thromboplastin
4. prothrombin ® thrombin
3, 4, 1, 2
Fred's blood was determined to be AB positive. What does this mean?
There are no antibodies to A, to B, or to Rh antigens in the plasma.
Sickling of red blood cells can be produced in those with sickle-cell anemia by:
Travel at high altitude and vigorous exercise