137, Which part of the bone makes erythrocytes A) Dense bone B) Compact bone C)

Question

137, Which part of the bone makes erythrocytes A) Dense bone B) Compact bone C) Medullary cavity D) Collagern E) Osteocyles 138. Which muscle type creates "goose A) Skeletal B) Cardiac C) Smooth D) Striated E) Folliculate 139 Why do some organisms have bony A) For protection and suppont B) To store phosphate for ATP C) To store iron for stabilizing blood plt D) To store magnesium for miuncle function E) A and B 140. What molecule causes the release of myosin from actin in muscle contraction? A) CO B) O C) ATP D) ADP E CAMP 141 Cardiac muscle has all of the Sollowing characdteristics encept for it being A) striated B) involuntary C) contracts wo muscle stimulation D) uninuclear E) multinuclear 142 Smooth muscle is NOT formed in which A) digestive s) excretory C) cirpulatory D) respiratory E) mo 43 A is an example of A) tongue B) trunk C) tentace D) all of the above E) sone of the shove 44 What n is mainly responsible for the contractions of actin and myosin A) Sodium B) Pasciu C) Salfide D) Calciunm E) CMorkd

Explanation / Answer

137)answer is option C.

Medullary cavity is the area inside any bone whether it maybe long bone,flat bone etc..,

It has yellow bone marrow or red bone marrow in it's cavity,so it is also called marrow cavity.

It is the central cavity of bone shafts.

Red bone marrow is primary source of erythropoiesis,which is located in medullary cavity.

138)answer is option C

Goosebumps are created when arrector pilli muscles present at the base of hair follicules are stimulated and they contract and pull the hair straight.

Arrector pilli are composed of bundle of smooth muscle fibres.

These attach to follicules of hair.

These are innevated by sympathetic branch of autonomous nervous system.(ANS)

139)answer is option E

The main function of bony skeleton is protection of internal organs and support for muscles.

It also acts as storage for calcium and phosphate.

So,phosphate stored in bone can be used in ATP production.

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