APHY 102 Exam 1
Terms in this set (50)
Nonsteroid hormones include peptides, proteins, glycoproteins, and amines
The pineal gland is
attached to the thalamus
Which hormone requires a releasing hormone from the hypothalamus for its secretion?
Diabetes insipidus is caused by
What hormone primarily affects the reproductive organs?
A sweat gland is an example of a(n) ___ gland
Hormones from the adrenal medulla increase
blood pressure, heart rate, breathing rate
stimulate certain endocrine glands to secrete hormones
The specificity of hormone action derives from
target cell receptors that are unique for each hormone
Hormones that the posterior pituitary secretes are synthesized in the
The sex hormones from the adrenal cortex are primarily androgens
A hormone is a __ and the target cell is __
molecule that has a metabolic effect on another cell; a cell that has receptors for specific hormones
levels of GH decrease but ADH increase
The hormone that stimulates calcium deposition into bone is
are soluble in lipids, combine with protein receptor molecules, cause messenger RNA synthesis
Steroid hormones diffuse through cell membranes, then bind with receptors, whereas nonsteroid hormones bind receptors on the target cell membrane
What has both endocrine and exocrine functions?
A person under stress may have a lowered resistance to infection
A red blood cell contains a large nucleus; it is thicker near the center and thin around the rim of the cell
What usually accounts for the smallest percentage of leukocytes in a blood sample?
A person with type A blood can successfully donate blood to a person with type __ blood
Plasma contains fibrinogen, serum does not
tissues swell with fluid
The red blood cells of type AB blood have on their surfaces
antigens A and B
the percent of red blood cells in a blood sample
What two mature blood cell types descend from myeloblasts?
neutrophils and basophils
What plasma protein is accurately described?
beta globulins- transport of lipids and fat-soluble vitamins
Persons with type AB blood are sometimes called universal donors
The basic event in the formation of a blood clot is the change of
fibrin to fibrinogen
What is the correct sequence for differentiation of a red blood cell?
hematopoietic stem cell, erythroblast, reticulocyte, erythrocyte
The percentage of red blood cells in a sample of human blood is normally about
Pus is composed of
bacteria, white blood cells, and damaged cells
"Formed elements" are
blood cells and platelets
Cardiac output is calculated by multiplying the stroke volume by the systolic blood pressure
When a person's pulse is taken by palpation near the thumb on the wrist, which artery is felt?
What is due to an aging cardiovascular system?
the tunica interna thickens
The inner lining of the heart is the
In an ECG pattern, the PQ interval indicates how long it takes for the cardiac impulse to travel from the
SA node through the AV node
Circulation is vital because it
supplies oxygen and nutrients to and removes wastes from tissues
Factors that increase heart rate and blood pressure include
emotional responses, exercise, and increase in body temperature
The systematic circuit
sends oxygen-rick blood to the tissues
When the ventricular walls contract,
the mitral and tricuspid valves close
The correct sequence of parts that carry cardiac impulses is
SA node, AV node, AV bundle, Purkinje fibers
When venous pressure is too low, __ stimulate smooth muscles in the walls of veins to contract
Listening with a stethoscope just to the right near the lower end of the sternum, sounds come most distinctly from the
The pulmonary circuit
sends oxygen-poor blood to the lungs
What wave of an ECG pattern is correctly described
P wave- depolarization of atria
What is the correct sequence of parts through which blood moves from the vena cava to the lungs?
right atrium, tricuspid valve, right ventricle, pulmonary valve
In the arterial disease atherosclerosis,
plaque accumulates on the interior walls of arteries, blood flow through affected arteries slows, and risk of a thrombus or embolus forming increases
What are the factors that increase risk of developing atherosclerosis?
lack of physical exercise, tobacco smoking, and a high diet in unsaturated fats