What is the name of the protein found in erythrocytes that allows for respiratory gas transport?
__________ is the situation when one hormone cannot exert its full effects without another hormone being present.
The primary source of RBCs in the adult human being is the bone marrow in the shafts of the long bones.
The ability of a specific tissue or organ to respond to the presence of a hormone is dependent on ________.
the presence of the appropriate receptors on the cells of the target tissue or organ
The stimuli causing endocrine glands to secrete their hormones in direct response to changing blood levels of certain critical ions and nutrients are called __________.
On a blood smear slide prepared using Wright's stain, you observe a large cell with a U-shaped nucleus and pale blue cytoplasm. This cell is most likely a(n) __________.
Which of the following is NOT a major type of stimulus that triggers endocrine glands to manufacture and release hormones?
Thyroid hormone (a small iodinated amine) enters target cells in a manner similar to ________.
steroid hormones, because both diffuse easily into target cells
Thyroxine is a peptide hormone, but its mechanism is different from other peptide hormones. Which of the following statements is true concerning this difference?
It does not require a second messenger to effect a response.
Diapedesis is the process by which red blood cells move into tissue spaces from the interior of blood capillaries.
What triggers erythropoietin (EPO) production to make new red blood cells?
reduced availability of oxygen
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 ________.
Steroid hormones exert their action by ________.
entering the nucleus of a cell and initiating or altering the expression of a gene
Which of the following hormones helps the body avoid dehydration and water overload?
Which of the following hormones mainly serves to stimulate milk production by the breasts?
The endocrine gland that is probably malfunctioning if a person has a high metabolic rate is the parathyroid.
Which of the following is best suited to the clotting process that occurs when blood vessels are ruptured?
Which of the following hormones stimulates the adrenal cortex to release glucocorticoids that help the body to resist stressors?
Up-regulation involves the loss of receptors and prevents the target cells from overreacting to persistently high hormone levels.
Growth hormone solely exerts its influence by targeting other endocrine glands to produce hormones.
Which of the following is not a change typically produced by a hormonal stimulus?
stimulates production of an action potential