290705
Descripción
Test por gina_evans0312, actualizado hace más de 1 año
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Creado por gina_evans0312
hace más de 10 años
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Pregunta 1
Pregunta
What effect does extracellular homeostasis have on intracellular homeostasis?
Respuesta
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It overrides it
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It is overridden by it
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It has no effect
Pregunta 2
Pregunta
What type of messenger is released by extodermal shedding?
Respuesta
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Membrane bound
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Direct diffusion
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Vesicle bound
Pregunta 3
Pregunta
How are cytoplasmic formed chemical messengers released?
Respuesta
-
Lipophillic diffusion through the membrane
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Dedicated passenger proteins
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Hydrophillic diffusion through the membrane
Pregunta 4
Pregunta
What Mr can be passed through direct diffusion?
Respuesta
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Low
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Moderate
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High
Pregunta 5
Pregunta
Which part of the myosin in the musce fibre contains the ATPase?
Respuesta
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Hinge region
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Light chain
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Heavy chain
Pregunta 6
Pregunta
What make up the Troponin complex in muscle?
Respuesta
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Troponin C
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Troponin I
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Troponin T
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Actin
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Myosin
Pregunta 7
Pregunta
Why is the sarcomere pronounced as a 'cell unit'?
Respuesta
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Muscles are polynucleatre
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Sarcomeres are the largest subunit
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They are the only subunits containing both actin/myosin
Pregunta 8
Pregunta
What muscular receptors are effected by Ach?
Respuesta
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Nicotinic Ach receptors
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Adeninic Ach receptors
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Adrenergic Ach receptors
Pregunta 9
Pregunta
How long is the half life of Ach
Respuesta
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1-2 secs
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10-20 secs
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4-5 secs
Pregunta 10
Pregunta
How many subunits make up Nicotinic Ach Receptors?
Respuesta
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5- 2 alpha, a beta a delta and a gamma
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5- an alpha, 2 beta, a delta and a gamma
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5- an alpha, a beta, 2 delta and a gamma
Pregunta 11
Pregunta
All subunits in Nicotinic Ach Receptors have a transmembrane domain of 4 helices- which one is ampipathic?
Respuesta
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M1
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M2
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M3
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M4
Pregunta 12
Pregunta
When Ach binds, the subunits twist to replace an amino acid with an inorgaic ion. Name them.
Respuesta
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Leucine is replaced with Phosphate
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Tyrosine is replace with Sodium
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Serine is replace with Chlorine
Pregunta 13
Pregunta
When the impulse enters the muscle cell, what channels are opened in the T-tubule?
Respuesta
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DHP
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AHP
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CHP
Pregunta 14
Pregunta
Once the DHP receptor has been opened, which receptor does it open in the Sarcoplasmic Reticulum?
Respuesta
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Ryonadine
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Acetylcholamine
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Phosphodine
Pregunta 15
Pregunta
What keeps the Ca2+ concentration in the sarcoplasmic reticulum so high?
Respuesta
-
ATP driven Ca2+ pumps
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Ca2+/Cl- co-transporters
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Ca2+/Na+ exchange
Pregunta 16
Pregunta
Of the transmembrane helices in DHP, which do which jobs?
Respuesta
-
S4 - voltage sensing S5-6 form pores
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S5-6 - voltage sensing S4-form pores
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S2 - voltage sensing S3-4 form pores
Pregunta 17
Pregunta
What allows the DHP receptor to communicate with the Ryonadine receptor?
Respuesta
-
Loops II-III
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Loops III-IV
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Loops I-II
Pregunta 18
Pregunta
In the ryonadine receptor, the 6 hydrophobic helices are found in make up how many identical subunits?
Respuesta
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4
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5
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6
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7
Pregunta 19
Pregunta
The pore is formed in ryonadine receptors by what?
Respuesta
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The loops between S9 & S10
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The loops between S10 & S11
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The loops between S8 & S9
Pregunta 20
Pregunta
What protein holds the Ca2+ inside the sarcoplasmic reticulum for extra security?
Respuesta
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Calsequestrin
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Calcitachin
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Calcibindin
Pregunta 21
Pregunta
Which subunit of the dihydropyridine receptor contains 4 homologous transmembrane domains?
Respuesta
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Alpha 1
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Beta
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Alpha 2
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Gamma
Pregunta 22
Pregunta
How many helices make up each one of the four homologous transmembrane domains in the alpha one subunit of Dihydropyridine receptor?
Respuesta
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6
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4
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8
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