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FB1 Past Exams > 2017 physiology endterm > Flashcards

2017 physiology endterm Flashcards

1
Q

What is the function of the anchoring junctions?

a. Separates the apical surface from the basolateral surface
b. Connects the cytoskeleton of adjacent cells

A

b. Connects the cytoskeleton of adjacent cells

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2
Q

Which of the following indirectly activates enzymes leading to a cascade by second messengers?

a. Integrin receptors
b. Enzyme receptors
c. Serpentine receptor

A

c. Serpentine receptor

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3
Q

Which enzyme breaks PIP2 into IP3 and DAG?

a. Phospholipase C
b. Phosphokinase C
c. Phosphodiesterase C

A

a. Phospholipase C

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4
Q

When the body core temperature decreases, what occurs in the body?

a. Vasodilation
b. Increased cardiac output
c. Increased muscle tone

A

c. Increased muscle tone

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5
Q

Which area of the brain is responsible for thermoregulation?

a. Pre-optic area of hypothalamus
b. Paraventricular area of hypothalamus

A

a. Pre-optic area of hypothalamus

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6
Q

What best describes fever state?

a. Temperature goes back to normal after flush
b. Crisis – vasoconstriction
c. Chill – vasodilation
d. Set point doesn’t change

A

a. Temperature goes back to normal after flush

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7
Q

Which of the following illustrate the reflex arch?

a. Sensory-receptor-brain-muscle
b. Receptor-sensory-spinal cord-muscle
c. Receptor-sensory-neuron-brain
d. Brain-motor-neuron-muscle

A

b. Receptor-sensory-spinal cord-muscle

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8
Q

Which proteins are responsible for anterograde and retrograde transport in microtubules?

a. Kinesin and dynein
b. Catherin and myosin 1
c. Actin and myosin 1

A

a. Kinesin and dynein

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9
Q

Which ion is involved in ATP- dependent formation of f-actin?

a. Mg
b. N
c. Ca
d. K

A

a. Mg

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10
Q

A muscle contraction results in shortening of 0.7 mm in a muscle fiber of 2.3 mm length resting sarcomere and 1.6 mm A bandwidth. What is the final width of A band during contraction?

a. 0.7
b. 1.6
c. 3.0
d. 2.3

A

b. 1.6

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11
Q

Which of the following occurs during LTD?

a. Enhanced entry of Ca+ ion through NMDA receptor
b. Increased phosphorylation of AMPA receptor
c. Decreased conductance of NMDA receptors
d. Decreased expression of AMPA reception

A

d. Decreased expression of AMPA reception

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12
Q

What was the sensory receptor for decreasing the heart rate?

a. Muscarinic M1
b. Muscarinic M2
c. Muscarinic M3

A

b. Muscarinic M2

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13
Q

Which of the following increases the rate of relaxation of myocardial muscle?

a. Na/k ATPase
b. Phosphorylation of phospholamban protein
c. More IP3

A

b. Phosphorylation of phospholamban protein

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14
Q

What is the function of gap junctions?

a. Separate apical surface from basolateral surface
b. Transport of large proteins
c. Second messengers exchange

A

c. Second messengers exchange

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15
Q

Which segment carries parasympathetic preganglionic nerve fibers?

a. Thoracic
b. Lumbar
c. Sacral

A

c. Sacral

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16
Q

Decrease of which parameter reduces the affinity of hemoglobin to oxygen?

a. pH
b. Temperature
c. P(CO2)
d. 2,3-DPG

A

a. pH

17
Q

What is a physiological mechanism of posterior pituitary hormone?

a. Water retention by kidneys
b. Decrease in intracellular Ca+2
c. Increase in potassium concentration

A

a. Water retention by kidneys

18
Q

What causes the relaxation of vascular smooth muscle cells?

a. Activation of IP3 receptors
b. Inactivation of BKca+2 (calcium regulated potassium channel)
c. Inactivation of Rho-kinase

A

c. Inactivation of Rho-kinase

19
Q

What is the sympathetic innervation of sweat glands?

a. Cholinergic sympathetic fibers
b. Adrenergic sympathetic fibers

A

a. Cholinergic sympathetic fibers

20
Q

Why does facilitation occur?

a. Increased residual Ca+2
b. Less releasable NT

A

a. Increased residual Ca+2

21
Q

What decreases resting metabolic rate?

a. Stress
b. Pregnancy
c. Smoking
d. Age

A

d. Age

22
Q

patient Y has a higher BMI and a higher WHR than patient X. Which one has a higher risk of developing cardiovascular diseases?

a. Same
b. Can’t be predicted
c. X has a higher risk
d. Y has a higher risk

A

d. Y has a higher risk

23
Q

What is the function of the microtubule the nervous system?

a. Fixation of the nucleus
b. Vesicle transport

A

b. Vesicle transport

24
Q

A 23-year-old female has a BMI of 25. What’s her body fat percentage?

A

body fat %=1.2(BMI) + 0.23(age) - 10.8(sex) - 5.4

29.9

FB1 Past Exams (42 decks)

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