Most Asked Phys Questions Flashcards by Julia Gumirov

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

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Opening of voltage gated potassium channels causes which of the following?
A) repolarization
B) resting potential
C) accommodation
D) depolarization

A) repolarization

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The principal function of rods is in?

dim light vision

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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

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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

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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

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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

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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

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The most commonly represented neuronal type in humans is which of the following?
A) unipolar
B) bipolar
C) multipolar
D) pseudounipolar

D) pseudounipolar

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A bands contain which of the following?
A) myosin
B) actin
C) actin and myosin
D) neither

C) actin and myosin

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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

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Calcitonin is secreted by which of the following?
A) adenohypophysis
B) neurohypophysis
C) thyroid gland
D) parathyroid gland

C) thyroid gland

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A muscle contraction with no joint movement might best be described as an

isometric contraction

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Indicate the function of the sodium pump

pumps sodium out of the intercellular spaces to the interstitial fluid

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Uracil is only found in

RNA

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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

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The universal blood recipient group is

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The loop of henle is least permeable to which of the following?
A) sodium
B) chloride
C) water
D) sodium and chloride

C) water

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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

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The adrenal cortex is responsible for the secretion of all of the following except?
A) glucocorticoids
B) mineralcorticoids
C) catecholamines
D) androgens

C) catecholamines

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Synthesis, storage, and release of Abs are primarily a function 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 ______

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