Test
Cell & Muscle Signalling
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Preguntas del test (22)
1What effect does extracellular homeostasis have on intracellular homeostasis?
- AIt overrides it
- BIt is overridden by it
- CIt has no effect
2What type of messenger is released by extodermal shedding?
- AMembrane bound
- BDirect diffusion
- CVesicle bound
3How are cytoplasmic formed chemical messengers released?
- ALipophillic diffusion through the membrane
- BDedicated passenger proteins
- CHydrophillic diffusion through the membrane
4What Mr can be passed through direct diffusion?
- ALow
- BModerate
- CHigh
5Which part of the myosin in the musce fibre contains the ATPase?
- AHinge region
- BLight chain
- CHeavy chain
6What make up the Troponin complex in muscle?
- ATroponin C
- BTroponin I
- CTroponin T
- DActin
- EMyosin
7Why is the sarcomere pronounced as a 'cell unit'?
- AMuscles are polynucleatre
- BSarcomeres are the largest subunit
- CThey are the only subunits containing both actin/myosin
8What muscular receptors are effected by Ach?
- ANicotinic Ach receptors
- BAdeninic Ach receptors
- CAdrenergic Ach receptors
9How long is the half life of Ach
- A1-2 secs
- B10-20 secs
- C4-5 secs
10How many subunits make up Nicotinic Ach Receptors?
- A5- 2 alpha, a beta a delta and a gamma
- B5- an alpha, 2 beta, a delta and a gamma
- C5- an alpha, a beta, 2 delta and a gamma
11All subunits in Nicotinic Ach Receptors have a transmembrane domain of 4 helices- which one is ampipathic?
- AM1
- BM2
- CM3
- DM4
12When Ach binds, the subunits twist to replace an amino acid with an inorgaic ion. Name them.
- ALeucine is replaced with Phosphate
- BTyrosine is replace with Sodium
- CSerine is replace with Chlorine
13When the impulse enters the muscle cell, what channels are opened in the T-tubule?
- ADHP
- BAHP
- CCHP
14Once the DHP receptor has been opened, which receptor does it open in the Sarcoplasmic Reticulum?
- ARyonadine
- BAcetylcholamine
- CPhosphodine
15What keeps the Ca2+ concentration in the sarcoplasmic reticulum so high?
- AATP driven Ca2+ pumps
- BCa2+/Cl- co-transporters
- CCa2+/Na+ exchange
16Of the transmembrane helices in DHP, which do which jobs?
- AS4 - voltage sensing
S5-6 form pores - BS5-6 - voltage sensing
S4-form pores - CS2 - voltage sensing
S3-4 form pores
- AS4 - voltage sensing
17What allows the DHP receptor to communicate with the Ryonadine receptor?
- ALoops II-III
- BLoops III-IV
- CLoops I-II
18In the ryonadine receptor, the 6 hydrophobic helices are found in make up how many identical subunits?
- A4
- B5
- C6
- D7
19The pore is formed in ryonadine receptors by what?
- AThe loops between S9 & S10
- BThe loops between S10 & S11
- CThe loops between S8 & S9
20What protein holds the Ca2+ inside the sarcoplasmic reticulum for extra security?
- ACalsequestrin
- BCalcitachin
- CCalcibindin
21Which subunit of the dihydropyridine receptor contains 4 homologous transmembrane domains?
- AAlpha 1
- BBeta
- CAlpha 2
- DGamma
22How many helices make up each one of the four homologous transmembrane domains in the alpha one subunit of Dihydropyridine receptor?
- A6
- B4
- C8
Información
- Descripción
- Year 2 Test sobre Cell & Muscle Signalling, creado por gina_evans0312 el 20/10/2013.
- Autor
- gina_evans0312
- Idioma
- English
- Visitas
- 1.117
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- Valoración
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