NEET Zoology Locomotion and Movement Class 11 Questions

Sliding filament theory can be best explained as:

Which one of the following are the incorrect match

Cells of the human body exhibit three main types of movements, namely, amoeboid, ciliary and muscular. Which of the following given example correct for such movement? (i) Some specialised cells in our body like macrophages and leucocytes in blood exhibit amoeboid movement. (ii) Cytoskeletal elements like microfilaments are also involved in amoeboid movement. (iii) Muscular movement occurs in the trachea help us in removing dust particles and some of the foreign substances inhaled along with the atmospheric air. (iv) Passage of ova through the female reproductive tract is also facilitated by the ciliary movement. (v) Movement of our limbs, jaws, tongue, etc., require muscular movement. (vi) The contractile property of muscles is effectively used for locomotion and other movements by human beings and majority of multicellular organisms.

Select the correct statement regarding the specific disorder of muscular or skeletal system:

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Osteoporosis is characterised by decreased bone mass and increased chance of fractures.

Reason (R): Common cause of osteoporosis is increased levels of estrogen.

In the light of the above statements, choose the most appropriate answer from the options given below :

Fill in the blank spaces and select option which contain true answer of blanks:

(A) All mammals (except a few) have ________ 1 ________ cervical vertebra.

(B) The number of phalanges in each limb of human is ________ 2 ________.

(C) Thin filament of myofibril contains 2 'F' actions and two other proteins namely, ________ 3 ________ and ________ 4 ________.

(D) In a muscle fibre Ca²⁺ is stored in ________ 5 ________.

Select the correct option :-

Between the atlas and axis, what type of movable joint is present?

The accumulation of uric acid crystals in the region of joints resulting in painful movement causes

What is the location of the ATPase of muscle?

The characteristic and an example of a synovial joint in humans is

From given characters about structure of contractile proteins myosin which option contain only true characters?

(i) Each filament is made of two 'F' (filamentous) protein helically wound to each other.

(ii) Many monomeric proteins called meromyosins constitute one thick filament.

(iii) Two filaments of another protein, troponin also run close to the 'F' actins throughout its length.

(iv) Each meromyosin has two important parts, a globular head with a short arm called the heavy meromyosin (HMM) and a tail, called the light meromyosin (LMM).

(v) In the resting state a subunit of tropomyosin masks the active binding sites for myosin on the actin filaments.

(vi) Each 'F' protein is a polymer of monomeric 'G' (Globular) protein.

(vii) The globular head is an active ATPase enzyme and has binding sites for ATP and active sites for thin filament.

What is the functional unit of contraction in a myofibril called?

How many bones are present in the human skeletal system?

What type of joints do not allow any movement?

Which protein is primarily found in the thin filaments of muscle fibers?

What is the role of calcium ions in muscle contraction?

What type of joint is formed by the fusion of flat skull bones with dense fibrous connective tissues?

What is the main function of the pectoral and pelvic girdles in the skeletal system?

What type of movement is characterized by the streaming of protoplasm in unicellular organisms like Amoeba?

What is the function of the pectoral girdle in the skeletal system?

What type of movement is exhibited by unicellular organisms like Amoeba?

Which protein in the muscle fibre masks the active binding sites for myosin on the actin filaments in the resting state?

What is the role of troponin in muscle contraction?

What initiates the process of muscle contraction?

What type of joint is formed by the fusion of flat skull bones with dense fibrous connective tissues?

What type of joint is characterized by the bones being joined together with the help of cartilages?

What type of joint is formed by the fusion of flat skull bones with dense fibrous connective tissues?

What type of movement involves the streaming of protoplasm in organisms like Amoeba?

Which bone is known as the longest bone in the human body?

What is the functional unit of contraction in a muscle fibre called?

Which of the following muscles is characterized as striated, branched, and involuntary?

Which type of movement is characterized by the use of cilia for both locomotion and feeding in Paramecium?

What is the primary function of myoglobin in muscle tissue?

What neurotransmitter is released at the neuromuscular junction to initiate muscle contraction?

What type of joint is formed by the fusion of flat skull bones through dense fibrous connective tissues?

How many cervical vertebrae are typically found in mammals, including humans?

What type of joints do not allow any movement?

What type of joint is formed by the fusion of flat skull bones with dense fibrous connective tissues?

What type of movement is characterized by the movement of cilia and flagella in various organisms?

What type of movement is characterized by the use of tentacles in organisms like Hydra?

Which of the following statements about the skeletal system is correct?

Which of the following statements about muscle contraction is correct?

Which of the following statements about muscle contraction are correct?

Which of the following combinations correctly describe the types of joints in the human skeletal system?

Which combination of statements about the skeletal system is correct?

Which of the following statements about types of movement are correct?

Which of the following combinations accurately describe types of movement in living organisms?

Which combination of statements about muscle contraction is correct?

Which of the following statements about the skeletal system and joints is correct?