Most Asked Phys Questions Flashcards
Which of the following is the region of the eye containing the most color sensitive cells?
A) optic disc
B) foveal region
C) parafoveal region
D) iris
B) foveal region
Opening of voltage gated potassium channels causes which of the following?
A) repolarization
B) resting potential
C) accommodation
D) depolarization
A) repolarization
The principal function of rods is in?
dim light vision
Which of the following characterizes a relative refractory period?
A) excess excitability
B) decreased excitability
C) absence of excitability
D) no reaction to excitability
C) absence of excitability
An UMNL involves which of the following?
A) upper extremities only
B) flaccid paralysis
C) cerebral cortex to anterior horn
D) anterior horn to muscle
C) cerebral cortex to anterior horn
Vital capacity of the lung can be described as all of the following except?
A) Volume of gas that can be expelled from the lungs from a position of full inspiration
B) inspiration capacity + expiratory reserve volume
C) inspiratory reserve volume + expiratory reserve volume + tidal volume
D) tidal volume + inspiratory reserve volume
D) tidal volume + inspiratory reserve volume
Cyanosis is not caused by?
A) increased arterial pressure
B) venous stasis
C) decreased % of oxygenated Hb
D) increased conc. of deoxygenated Hb
A) increased arterial pressure
Storage of most of the calcium used in excitation of skeletal muscle is a function of which of the following structures?
A) T tubules
B) sarcoplasmic reticulum
C) troponin
D) sarcolemma
B) sarcoplasmic reticulum
The most commonly represted neuronal type in humans is which of the following?
A) unipolar
B) bipolar
C) multipolar
D) pseudounipolar
D) pseudounipolar
A bands contain which of the following?
A) myosin
B) actin
C) actin and myosin
D) neither
C) actin and myosin
With respect to skeletal muscle, the physiologist would expect to find an inverse relationship between the:
A) load on the muscle and the velocity of contraction
B) muscle mass and cross sectional area
C) muscle length and force of contraction
D) low velocity of contraction and efficiency of contraction
A) load on the muscle and the velocity of contraction
Calcitonin is secreted by which of the following?
A) adenohypophysis
B) neurohypophysis
C) thyroid gland
D) parathyroid gland
C) thyroid gland
A muscle contraction with no joint movement might best be described as an
isometric contraction
Indicate the function of the sodium pump
pumps sodium out of the intercellular spaces to the interstitial fluid
Uracil is only found in
RNA
S2 heart sounds denote which of the following?
A) closing of the AV valves
B) closing of the semilunar valves
C) ventricular filling
D) atrial contraction
B) closing of the semilunar valves
The universal blood recipient group is
AB
The loop of henle is least permeable to which of the following?
A) sodium
B) chloride
C) water
D) sodium and chloride
C) water
In EKG tracing, which represents the max ventricular repolarization potential?
A) PQ segment
B) ST segment
C) QRS complex
D) T wave
D) T wave
The adrenal cortex is responsible for the secretion of all of the following except?
A) glucocorticoids
B) mineralcorticoids
C) catecholamines
D) androgens
C) catecholamines
Synthesis, storage, and release of Abs are primarily a func tion of which of the following?
A) lymphocytes
B) plasma cells
C) mast cells
D) eosinophils
B) plasma cells
Which causes the reabsorption of sodium from the DCT?
A) aldosterone
B) ADH
C) parathyroid hormone
D) renin
A) aldosterone
Which has preganglionic sympathetic fibers?
A) white rami communicantes
B) gray rami communicantes
C) adrenal medulla
D) sympathetic chain ganglia
A) white rami communicantes
Regular inspiration is controlled by
A) pneumotaxic
B) apneustic
C) dorsal neuron
D) ventral neuron
C) dorsal neuron
Which produces pulmonary surfactant?
A) type 2 alveolar cells
B) type 1 alveolar cells
C) dust cells
D) goblet cells
A) type 2 alveolar cells
Secreted from the duodenum and upper jejunal mucosa and results in contraction of the gallbladder
A) CCK
B) secretin
C) amylase
D) lipase
A) CCK
Occurs between closure of AV valve and reopening of the AV valve
A) atrial diastole
B) atrial systole
C) ventricular diastole
D) ventricular systole
A) atrial diastole
Nerve conduction is fastest when there is
A) longer nerve
B) more myelin
C) large diameter
D) small diameter
C) large diameter
Mature or dead RBCs are filtered out by what organ?
spleen
Which is not released due to digestion?
A) gastrin
B) secretin
C) ADH
D) CCK
C) ADH
What is the function of secretin?
A) to decrease gastric motility
B) causes contraction of the gallbladder
C) produce HCl in the stomach
D) to increase gastric motility
A) to decrease gastric motility
What receptor is tonic?
A) hair cell
B) pacinian
C) meissner’s
D) muscle spindles
D) muscle spindles
Where is the macula densa located?
DCT
What type of receptor is a pacinian corpuscle?
A) mechanoreceptor
B) nociceptor
C) chemoreceptor
D) thermoreceptor
A) mechanoreceptor
Residual volume + vital capacity=
total lung capacity
Which is innervated by the preganglionic sympathetic?
A) anterior pituitary
B) posterior pituitary
C) adrenal cortex
D) adrenal medulla
D) adrenal medulla
Which is not characteristic of pacinian corpuscles?
A) detects vibration
B) detects tissue deformity
C) detects temp changes
D) initiates the stretch reflex
C) detects temp changes
Calcium absorption from the GI tract is increased by vitamin ______
D
The structure which detects tension in a muscle tendon is called….
golgi tendon organ
Hyperventiliation produces
A) respiratory alkalosis
B) respiratory acidosis
C) metabolic alkalosis
D) metabolic acidosis
A) respiratory alkalosis
A nurse caring for a supine, bed-ridden patient notices that he has difficult time breathing, and seems to be working hard to get the air in and out. Which expression should she use to describe the condition?
A) apnea
B) dyspnea
C) orthopnea
D) cyanosis
C) orthopnea
Identify the origin of the impulse for the contraction of the myocardium:
SA node
If the long thoracic nerve is destroyed, paralysis of the ________________ would result
serratus anterior
Which is not a characteristic of cardiac muscle?
A) all or none law
B) tetanization
C) rhythmic contraction
D) striations
B) tetanization
Under normal circumstances, the largest volume of blood is located in the:
large veins
The supporting tissues of the CNS are:
oligodendrocytes
When arterial pressure increases, everything happens, except:
A) peripheral vessels constrict
B) heart rate increases
C) heart rate decreases
D) force fo contraction increases
C) heart rate decreases
Which of these is not an anticoagulant?
A) heparin
B) antithrombin
C) dicoumarol
D) accelerator globulin
D) accelerator globulin
Which of there is not secreted by the adrenal glands?
A) corticosteroids
B) epi
C) ACTH
D) aldosterone
C) ACTH
The production of RNA in the nucleus is called _____________
transcription
