Physiology Final Review Flashcards
A glomerulus is
the main filtering unit of the kidney
ACE converts
Angiotensin I into angiotensin II, a potent vasoconstrictor, role in blood pressure regulation.
All of the following would cause an increase in blood pressure EXCEPT
a decrease in cardiac output
Amylases, the enzymes used to digest carbohydrates, are secreted by
salivary glands into the mouth and the pancreas into the intestine.
Juxtaglomerular cells in the nephron secrete
renin
Meiosis of one cell results in production of____WHAT?
Four genetically diverse haploid cells.
The H zone of a sarcomere contains….WHAT?
myosin
The QRS complex of an ECG corresponds to_____WHAT HAPPENS THERE
depolarization of ventricles
The mean arterial pressure (MAP) is important because..WHAT?
it measures the pressure necessary for adequate perfusion of the organs of the body
or
it represents the driving pressure for blood flow
Which of the following symptoms would you expect to observe in a person suffering from type I diabetes mellitus?
A.) hyperglycemia
B.) thirst and polydipsia
C.) glucosuria
D.) ketoacidosis
Glucosuria, thirst and polydipsia, hyperglycemia, ketoacidosis, All of these answers are correct.
Which of the following occurs immediately after the power stroke?
The myosin head must detach from actin.
Cross-bridge formation occurs when calcium________
Calcium binds to troponin, altering its shape.
What does “Calcium induce calcium release” mean?
the process by which extracellular Ca2+ triggers the release of stored Ca2+ from the sarcoplasmic reticulum.
The sensory fibers of the muscle spindles synapse onto
alpha motor neurons.
The polysynaptic reflex has at least one interneuron placed between the sensory and motor neurons.
true
When there is a resistance to stretch produced by a given limb muscle,____________.
Muscle tone is increased and more motor units are recruited to the contraction.
The ____________________ reflexes involve skeletal muscles.
Somatic reflexes
The tension generated in a skeletal muscle fiber is directly proportional to the number of_______
high energy crossbridges formed
The contraction cycle is initiated by the rise in Na+ released from the sarcoplasmic reticulum (SR).T/F
false
Which of the following is not a vasoconstrictor?
Artrial natriuretic peptide
Adenosine is vasodilator that increases blood flow to match metabolism, its source is the mast cells. T/F
Flase
Everything is true about veins, except;
The primary determinant of velocity is the total cross-sectional area of the vessel. T/F
True
Which is not a factor that influences mean arterial pressure?
influences: Blood volume, Heart rate, Stroke volume, Blood viscosity, Peripheral resistance.
This reflex help us maintain body position…WHAT IS ?
myotatic reflex.
In myocardial action potentials, in phase 2, we observe_________. WHAT
Calcium channels open and calcium ions pass into the muscle to facilitate muscular contraction.
Which of the following has a long refractory period? Difference between muscles
Cardiac Muscle
The T-P segment in EKG signifies _ _WHAT ____________.
The time between the end of heartbeat a and the beginning of heartbeat b.
Which one is not part of the treatment for high blood pressure?
Diuretics and calcium channel blockers
Which is not a Tubular Element of the Kidney?
The Collecting Duct