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Flashcards in Physiology 1 Deck (98)
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Salatory conduction is described as conduction or an action potential through which type of fiber?
A. Myelinated nerve
B. Unmyelinated nerve
C. Cardiac muscle
D. Smooth muscle

A. Myelinated nerve


The greatest increase in peripheral vascular restriction in response to wide spread sympathetic stimulation is going to effect which tissue?
A. Nepatic
B. Cardiac
C. Cutaneous
D. Pulmonary

C. Cutaneous


Glomerulus consist primarily of ? that contain relative ? pressure compared to similar vessels in the bobd?
A. Capillaries/high
B. Capillaries/low
C. Arterioles/high
D. Arterioles/low

A. Capillaries/high


Relative refractory period is influenced by which of the following conditions?
A. increase Na
B. increase K
C. decrease Na
D. decrease K

B. increase K


During which of the following stages is the most prolactin secreated?
A. Soon after implantation
B. After delivery
C. Post partum
D. Before implantation

B. After delivery


Which of the following organells of skeletal muscle transmitts the action potential from outside of the cell to the inside of the cell?
A. Myofibril
B. Sacroplasmic reticulum
C. T-tubule
D. Cross bridges

C. T-tubule


The resting membrane potential of a neural membrane is said to be?
A. Neutral
B. Polar
C. Depolarized
D. Hyperpolarizied

B. Polar


In order to absorb Vit. B-12 which of the following is required?
A. Bile salts
B. Micells
C. Intrinsic factor
D. Pepsin

C. Intrinsic factor


Which of the following is a rapidly adapting receptor?
A. Golgi tendon apparatus
B. Thermoreceptor
C. Ruffini coruscle
D. Pacinian corpuscle
E. Golgi tendon apparatus

D. Pacinian corpuscle


What maintains basic body temep. Wht the entire body is chilled?
A. Skin vasoconstriction
B. Sweating
C. Chemical thermogensis
D. Shivering

D. Shivering


Which of the following is the stimulus to activate the flexor/withdraw response?
A. Pain
B. Cold
C. Pressure
D. Touch

A. Pain


Stimulation of which of the following tracts causes involuntary contraction of an excitatory extensor?
A. Reticulospinal
B. Rubrospinal
C. Corticospinal
D. Vestibulospinal

D. Vestibulospinal


Which of the following structures is not involved in the light reflex?
A. Pretectal
B. Edinger westphal nucleus
C. Cillary ganglion
D. Lateral geniculate

D. Lateral geniculate


Which of the following is a characteristic of smooth muscle?
A. Chodroitin
B. Fibers are arranged in sarcomere
C. Actin
D. Muscle spindles

C. Actin


Influx of what ion is responsible for depolarization?
A. Potassium
B. Sodium
C. Magnesium
D. Magnesium

B. Sodium


The greatest % of CO2 is transported as?
A. Dissolved CO2
B. Carboxylhemoglobin
C. Carbaminohemoglobin
D. Bicarbonate ion

D. Bicarbonate ion-> 70%


Which area of the brain coordinates voluntary eye movement?
A. Frontal
B. Temporal
C. Occipital
D. Parietal

A. Frontal-> (motor) pre motor cortex


From which of the following structures is LH derived?
A. Leydig cells
B. Anterior pituitary
C. Posterior pituitary
D. Hypothalamus

B. Anterior pituitary


The pancreas secretes which of the following substances?
A. Amylose
B. Gastrin
C. Somatostatin
D. Somatomedin

C. Somatostatin-> From delta cells of the pancreas-> Balancing hormone for GH.

NOTE: alpha cells of pancreas-> glucagon. Beta cells of pancreas-> insulin


During the resting phase of a neuron what is secreted?
A. Na. K. pump
B. Na. Out
C. K. out
D. Ca. In

B. Na. Out


Which of the following will lengthen the time for blood clotting?
A. decrease Vit. K
B. increase arterial pressure
C. increase venous pressure
D. decrease capillary pressure

A. decrease Vit. K


The stomach secretes which of the following substances?
A. Lipase
B. Gastrin
C. Cholecystokinin
D. Secretin

B. Gastrin-> 2 functions 1) Activates prital cells to produce HCL. 2) Activates Chief cells.


Which of the following is responsible for the formation of the corpus luteum?
B. Estrogen
C. Progesterone



When you come in contact with a cold object heat is lost by which of the following means?
A. Convection
B. Conduction
C. Evaporation
D. Radiation

B. Conduction


When body temperature is decreased by air currents what type of heat loss is this?
A. Convection
B. Conduction
C. Evaporation
D. Radiation

A. Convection-> air currents


Which of the following is most apt to produce the lowest renal filtration faction for glucose?
A. Hypoglycemia
B. Hyperglycemia
C. Glucosuria
D. Galactosemia

A. Hypoglycemia


Which the following is present in both cascade pathways?
A. C-1
B. C-2
C. C-3
D. C-4

C. C-3-> links alternate and classical


Systemic circulation differs from pulmonic circulation in that it has a ? Pressure and a ? resistance to flow?
A. Lower/lower
B. Lower/higher
C. Higher/lower
D. Higher/higher

D. Higher/higher


Which of the following conditions is most likely to cause edema?
A. Decrease arterial pressure
B. Increase plasma
C. Increase venous pressure
D. Increase lymphatic pumping from skeletal muscle action

C. Increase venous pressure


Which of the following is increased in fast muscle fibers?
A. Concentration of glycolytic enzymes
B. Concentration of Mitochondria
C. Concentration of myoglobin
D. Intercellular K concentration

A. Concentration of glycolytic enzymes