Sarcomeres shorten by_____________. Shortening of myosin and actin Detachment of

Question

Sarcomeres shorten by_____________.

Shortening of myosin and actin

Detachment of titin from myosin

Extension of nebulin

Sliding od actin and myosin filaments

Extension of H zone

.......

A ______________is when myosin head attaches to its binding site on actin.

Cross bridge

Power stroke

Detachment

Contraction

....

Which of the following molecules generate ATP in the electron transport chain?

NADH

FADH

Glycogen

A and b

None of the above

..........

In a developed fetus, blood cells are formed by   

Adipocytes, lymph nodes, reticular cells

Liver, spleen, thymus

None of the above

...........

Waste products that come into the bile canaliculi are secreted from  

Hepatocytes

Chief cells

Sinusoids

Explanation / Answer

Q 1 answer is shortening of actin and myosin filament- yes during excitation contraction coupling both actin myosin slide over each other so contraction occur,, and sarcomere shortens.

Q2 a CROSS BRIDGE occur when mysin head come in contact with the actin filament, so as per sliding filament hypothesis of muscle contraction globular head of myosin attach temporarily with the actin and cross bridging occur

Q3 both NADH and FADH are responsible for the production of ATP in ETC

because during oxidative phosphorylation variousc enzyme complex receive e from NADH AND FADH so that H gradient created and ATP GENERATION OCCUR in inner mitochondrial membrane.

Q4 in developed foetus due to immature bone marrow erythropoisis occur in the spleen and LIVER mainly.

Q5 bile canaliculi present in the liver so HEPATOCYTE secrete their waste material in to sinusoid from where it goes to the bile canaliculi.

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