FREE NEET Biology Practice MCQ Test: Locomotion And Movement Exercise 4 Questions Answers With Detailed Explanations [PDF]

Answer: (b)

Cartilaginous joint is present between ribs and sternum. It allows only limited movement. An angular joint allows movement in two directions - side to side and back and forth. Wrist and metacarpophalangeal joints are of this type. Gliding joint permits sliding movements of two bones over each other, e.g., joints between sternum and clavicles. Fibrous joints do not allow movement and are present between the bones of cranium.

Answer: (a)

Answer: (d)

Answer: (b)

Each pectoral girdle consists of two bones, clavicle and scapula. The scapula (shoulder blade) consists of a sharp ridge, the spine and a triangular body. The end of the spine projects as a flattened and expanded process called acromion. This process articulates with the clavicle. At the lateral end of the superior of the scapula is projection of the anterior surface called the coracoid process, to which the tendons of the muscles attach.

At the point where the superior and lateral borders of the scapula meet there is the lateral angle which presents a shallow articular surface termed as glenoid cavity into which the head of the humer is articulated.

Answer: (d)

Gliding joint permit only back and forth and side to side movements. e.g. zygapophysis of adjacent vertebrae.

Answer: (b)

Long bones, like humerus, radius and ulna of forearm, femur, tibia and fibula of shank in adult mammals provides support.

Answer: (c)

Answer: (c)

Answer: (c)

Cartilage is an important component of skeleton. It consists of a firm matrix containing collagen and elastin fibres and cells in fluid-filled lacunae. Cartilage has many types. Elastic cartilage occurs in the pinna and external auditory canal of the ear, epiglottis, Eustachian tubes and tip of the nose to make these organs flexible. Fibrous cartilage is very strong yet has a degree of flexibility. It is found in the intervertebral discs where it acts as a cushion and in pubic symphysis where it allows parturition without damage to the girdle. Hyaline cartilage occurs in sternal ribs where it allows expansion of chest during inspiration. It also forms the tracheal and bronchial rings and supports larynx and nasal septum and also at the end of long bones.

Answer: (a)

The vast majority of mammals have seven cervical vertebrae (neck bones), including camel, bats, giraffes, whales and humans. The few exceptions include the manatee and the two-toed sloth, which each have only six cervical vertebrae and the three-toed sloth with nine cervical vertebrae.

Answer: (a)

Fibrous joint is present between the human skull bones. It does not allow movement because the bones are held firmly together by bundles of strong white collagen fibres. Cartilaginous joints are present between the centre of vertebrae, at the pubic symphysis and between ribs and sternum. Knee joint, elbow joint and ankle joint are types of hinge joint. Synovial joint occurs between limb and bones.

Answer: (c)

Answer: (c)

Hyoid is a horse shoe shaped bone present in neck between lower law and sound box (larynx). It is not articulated to any bone, but is simply suspended, from temporal bones by means of ligaments. Hyoid provides surface for the attachment of tongue muscles.

Answer: (a)

The vast majority of mammals have seven cervical vertebrae (neck bones), including camel, bats, giraffes, whales and humans. The few exceptions include the manatee and the two-toed sloth, both have only six cervical vertebrae and the three-toed sloth with nine cervical vertebrae.

Answer: (c)

The ER releases calcium ions only if stimulated by an action potential, which requires acetylcholine to diffuse across the neuromuscular junction.

Answer: (b)

A - I, B - II, C - III, D - IV

Answer: (a)

Answer: (d)

Answer: (d)

The label 'X' in the figure of actin filament is troponin. Troponin is a complex of three regulatory proteins (troponin C, troponin I, and troponin T) that is integral to muscle contraction in skeletal muscle and cardiac muscle, but not smooth muscle. Troponin is attached to the protein tropomyosin and lies within the groove between actin filaments in muscle tissue. In a relaxed muscle, tropomyosin blocks the attachment site for the myosin cross bridge, thus preventing contraction

Answer: (a)

There are twelve pairs of ribs which form the bony lateral walls of the thoracic cage. The first seven pairs are called true ribs; eighth, ninth and tenth pairs are called false ribs. The last two pairs of ribs are called floating ribs because their anterior ends are not attached either to the sternum or to the cartilage of another rib. The floating ribs protect the kidneys.