Exam I Correct for future exams Flashcards
Erythrocytes transport oxygen and________
carbon dioxide
What makes a cell responsive to a particular hormone?
The presence of a receptor for that particular hormone
Neither follicle stimulating (FSH) hormone nor testosterone alone can stimulate significant sperm production, whereas when they act together, the testes produce some 300,000 sperm per minute this is an example of which principle regarding hormones?
The synergistic effect
The _____ are the superior chambers of the heart and the ______ are the inferior chambers of the heart.
atria; ventricles
Which cells aid in the body’s defense process by secreting histamine and heparin?
basophils
Which of the following is not a feature of cardiac muscle?
They have about the same endurance as skeletal muscle fibers
Which of the following are not secreted by platelets?
Thrombopoietin
The plateau in the action potential of cardiac muscle results from the action of______
slow Ca2+ channels
When a clot is no longer needed, fibrin is dissolved by
plasmin
Which of the following belong to the pulmonary circuit?
pulmonary arteries and pulmonary veins
Which of the following is not a hypothalamic hormone?
luteinizing hormone (LH)
The heart is located in the space called the
mediastinum
The ____ secretes several hormones that stimulate the development of lymphatic organs and regulates development and activity of T cells (white blood cells)
thymus
The right atrioventricular valve (tricuspid) regulates the opening between the ______ and the ______.
right atrium; right ventricle
Which of the following organs has both endocrine and exocrine functions?
the ovary
Opening and closing of the heart valves is caused by
pressure gradients
Thyrotropin-releasing hormone targets the____.
anterior pituitary
The area where the major vessels lead to and from the heart’s chambers is called the _____ of the heart. The pointy, inferior portion is called the_____.
base; apex
The ____ performs the work of the heart.
myocardium
What are the least abundant of the formed elements?
basophils
Which of the following proteins is not normally found in plasma?
hemoglobin
The hypophyseal portal system connects the _____ with the_______.
anterior pituitary; hypothalamus
The posterior pituitary secretes _____
oxytocin (OT)
The _____ is the pacemaker that initiates each heart beat
sinoatrial (SA) node
The cessation of bleeding is specifically called
hemostasis
Atrial depolarization causes the_____
P wave
The _____ secretes growth hormone, which is also known as somatotropin
anterior pituitary
The number of _____ typically increases in response to bacterial infections
neutrophils
The nervous system reacts to stimuli _____ compared to the endocrine system, adapts ______ compared to the endocrine system, and has _______ effects compared to the endocrine system.
quickly; quickly; specific
Which of the following is the most superficial layer enclosing the heart?
Parietal pericardium
The chord tendinae of the AV valves are anchored to the _______ of the ventricles
papillary muscles
In a normal ECG, the deflection that is generated by ventricular depolarization is called the ______.
T wave
Of the following hormones, which has more target cells in the body than the others?
- Corticotropin releasing hormone (CRH)
- Growth hormone (GH)
- Antidiuretic hormone (ADH)
- Growth hormone-releasing hormone (GHRH)
- Oxytocin (OT)
growth hormone
Cardioinhibitory centers in the _____ receive input from _____.
medulla oblongata; chemoreceptors in the aortic arch
Which of the following is not part of the cardiac conduction system?
purkinje fibers
The ABO blood group is determined by _____ in the plasma membrane of RBCs.
glycoproteins
Which of the following is not a function of blood?
produces plasma hormones
What are the most abundant a granulocytes?
lymphocytes
Which of the following is true regarding endocrine glands?
They release their secretions into blood
Platelets release _____, a chemical vasoconstrictor that contributes to the vascular spasm.
serotonin
Antidiuretic hormone (ADH) targets the ____.
kidneys
The ____ secrete(s) a hormone as a response to hypocalcemia
parathyroid glands
Where do most RBCs die?
spleen and liver
Serum is essentially identical to plasma except for the absence of _______.
fibrinogen
The infundibulum is a ______.
projection of the hypothalamus from which the pituitary gland hangs
Which of the following is not normally found in plasma?
glycogen
The _____ carry blood toward the lungs
pulmonary trunk and arteries
The ______ secretes a hormone that increases the body’s metabolic rate, promotes alertness, quickens reflexes, and stimulates the fetal nervous system.
thyroid gland
The structural framework of a blood clot is formed by _____
a fibrin polymer
The anterior pituitary is _____ than the posterior pituitary and has _____ connection to the hypothalamus
larger; no nervous
