The first step in hemostasis is __________

vascular spasm

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 most abundant leukocytes are __________.




What organ in the body regulates erythrocyte production?


The ability of a specific tissue or organ to respond to the presence of a hormone is dependent on ________.


The stimuli causing endocrine glands to secrete their hormones in direct response to changing blood levels of certain critical ions and nutrients are called __________.

humoral stimuli

Which of the following might trigger erythropoiesis?

hypoxia of EPO-producing cells



Hemorrhagic anemias result from blood loss.


Which of the following is NOT a major type of stimulus that triggers endocrine glands to manufacture and release hormones?


The majority of whole blood is __________.


Which of the following is characteristic of all leukocytes?

they are nucleated

Which of the following is not a category of endocrine gland stimulus?




Direct gene activation involves a second-messenger system.


Thyroid hormone (a small iodinated amine) enters target cells in a manner similar to ________.

steroid hormones, because both diffuse easily into target cells

Which type of leukocyte is responsible for antibody production?


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.

Bilirubin is cleared from the body by __________.




What triggers erythropoietin (EPO) production to make new red blood cells?

reduced availability of oxygen

What is required for the production of anterior pituitary gland hormones?

hormonal stimuli





Steroid hormones exert their action by ________.



antidiuretic hormone

What gland secretes growth hormone?

anterior pituitary (lobe)

Which leukocyte functions in phagocytizing bacteria?


In adults, red blood cell production occurs in __________.

red bone marrow

What is the primary function of hormones?

alter cell activity

When we take anti-histamines, we are countering the effects of which type of leukocyte?


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.


The __________ is the fluid portion of the blood.


Which of the following is best suited to the clotting process that occurs when blood vessels are ruptured?



adrenocorticotropic hormone

Which of the following is NOT a property of endocrine glands?

they have ducts

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.


What is hematocrit a measure of?

percentage of erythrocytes in a whole blood sample.

Which of the following is not a type of hormone interaction?


Iodine is an essential element required for the synthesis of thyroxine.


All peptide hormone synthesis requires gene activation that produces mRNA.


Which of the following is not a change typically produced by a hormonal stimulus?

stimulates production of an action potential

Major hormones circulate to virtually all tissues.


Which of the following is not a distribution function of blood?

transport of salts to maintain blood volume

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom


Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording