ENPC PREP EXAM NEW EDITION 2023-2024 VERIFIED QUESTIONS AND ANSWERS A+ GRADE LATEST UPDATE
At age 85, Lyle's immune system does not respond to vaccines
... [Show More] as well as it did when he was younger. The atrophy of which endocrine gland is likely responsible for this?
Thymus
Which organ is responsible for synthesizing atrial natriuretic peptide?
The heart
Mineralcorticoid is to aldosterone as glucocorticoid is to ____.
Cortisol
One of the least complicated of the endocrine control systems directly responds to changing blood levels of ions and nutrients. What is this mechanism?
Humoral stimulation
Thyroid hormone enters target cells in a manner similar to _____.
steroid hormones
Normal development of the immune response is due in part to hormones from the ____.
Thymus gland
The most important mineralcorticoid regulator of electrolytes in extracellular fluid is _____.
Aldosterone
Lisa starts to feel hungry and worries her blood sugar level may be dropping. What hormone helps prevent a drop in blood sugar level?
Glucagon
Steroid hormones exert their action by _____.
entering the nucleus of a cell and initiating or altering the expression of a gene
Aldosterone _____.
functions to increase sodium reabsorption
Which of the following is NOT a parathyroid gland mechanism to maintain adequate levels of blood calcium?
inhibition of calcitonin synthesis
A man has been told he is NOT synthesizing enough FSH and may be unable to father a child. Chose the correct statement to explain this problem.
FSH stimulates sperm production in the testes.
The single most important regulator of calcium levels in the blood is ____.
Parathyroid hormone
Oxytocin _____.
release is an example of a positive feedback mechanism.
ADH _____.
secretion is inhibited by alcohol
Which of the following is NOT a category of endocrine gland stimulus?
enzymatic
Virtually all amino acid-based hormones exert their signaling effects through intracellular _____.
second messengers
The parathyroid glands respond to which type of stimulus?
humoral
Which hormone is synthesized from cholesterol?
testosterone
Which synthetic hormone can be administered to help someone adjust to a new time zone?
Melatonin
The major targets of growth hormone are _____.
Bones and skeletal muscles
Johanna is significantly shorter than normal for her age. Her doctor recommends hormone treatment before her growth plates ossify in her long bones. Which hormone is recommended?
Growth hormone
Andrenocorticotropic hormone _____.
secretion is regulated by a hypothalamic regulatory hormone
Which hormone has only one known effect: to stimulate milk production in the breasts?
Prolactin
Which anterior pituitary hormone does NOT target another endocrine gland?
Growth hormone
Chemical substances secreted by the cells into the extracellular fluids are called _____.
Hormones
The ability of a specific tissue or organ to respond to the presence of a hormone is dependent on _____.
The presence of appropriate receptors
As a result of stress, the anterior pituitary releases _____
ACTH
The mechanism of transportation from hypothalamus to anterior pituitary gland is through the _____.
hypophyseal portal system
Gloconeogenesis is due to the action of _____.
Cortisol
The size and shape of a pea; produces hormones that stimulate other endocrine glands
Pituitary gland (hypophysis)
Is part of the sympathetic nervous system
Adrenal medulla
Produces hormones that regulate glucose levels in the body
Pancreas
Primary regulators of blood calcium levels
Parathyroid glands
Produces the body's major metabolic hormones
Thyroid gland
Which of the events below does NOT occur when the semilunar valves are open
Ventricles are in diastole
No visible cytoplasmic granules are present in_______
Monocytes
Which of the following is not true regarding fenestrated capillaries
Fenestrated capillaries form the blood- brain barrier
Which of the following transports for oxygen rich blood
Pulmonary vein
What do the ductus arterious and the foramen ovale become at birth
Ligamentum arteriousum; fossa ovalis
Which of the following is nit part of the intrinsic conduction system of the heart
Artioventricular (AV) valve
An individual who is blood type AB negative can
Receive any type of blood in moderate amount except that with the Rh antigen
The fact that the left ventricle of the heart is thicker than the right ventricle reveals that it______
Pumps blood against a greater resistances
Freds 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
The velocity of blood flow is______
slowest in the capillaries because the total cross-sectional area is the greatest
The wave of a normal electrocardiogram indicates______
atrial depolarization
Hemorrhage with a large loss of blood causes_______
A lowering of blood pressure due to change in cardiac output
Which of the choices below is the parent cell for all formed elements of blood
Hemocytoblast
When neither anti-A serum nor anti-B serum clot on a blood plate with donaor blood, the blood is type___
Blood is type O
What is the average normal pH range of blood
7.35-7.43
The baraceptors in the carotid sinus and aortic arch are senaitive to which of the following
change in arterial pressure
Which of the following is not a phase of hemostasis
Fibrinolysis
Loss of fibrinogen within the plasma would most likely cause which of the following
Loss of blood clotting
The foramen ovale________
Connected the two atria in the fetal heart
Which of the following recives blood during ventricular sytole
Pulmonary arteries only [Show Less]