Chapter 20

Repeated activation of the muscles can lead to the accumulation of due to anaerobic breakdown of glycogen in there causing fatigue. (a) Ethanol (b) Lactic acid (c) Citric acid (d) Butyric acid

A neurotransmitter \(\quad\) generates an action potential in the sarcolemma. (a) \(\mathrm{GABA}\) (b) Epinephrine (c) Glycine (d) Acetyt choline

Which of the following statement is correct? (a) A motor neuron along with the muscles fibres connected to it constitute a motor unit. (b) The reaction time of the fibres can vary in different muscles. (c) Muscle fatigue is due to lactic acid formation due to anaerobic respiration. (d) All the above

The protein which maintains the muscular storage of oxygen is (a) Myoglobin (b) Actomyosin (c) Myosin (d) Haemoglobin

Which is not the correct difference between white and red muscle fibres? \(\begin{array}{ll}\text { White muscle fibre } & \text { Red muscle fibre }\end{array}\) 1\. Less myoglobin \(-\) 1. More myglobin 2\. Number of mitochondria is less \- 2. Number of mitochondria is more 3\. Amount of sarcoplasmic reticulum is low \(-3\). Amount of sarcoplasmic reticulum is high 4\. Aerobic muscle \(-4\). Anaerobic muscle (a) 1 (b) 2 (c) 3 (d) 4

Skeletal system consists of (a) Framework of bone (b) Few cartilages (c) Both (a) and (b) (d) None of these

Cartilage has slightly pliable matrix due to (a) \(\mathrm{Ca}^{2+}\) (b) \(\mathrm{Mg}^{2+}\) (c) Chondroitin salts (d) Phosphorus

Skull is composed of (a) Cranial bones (8) (b) Facial bones (14) (c) Both (a) and (b) (d) None of these

The hard and protective outer covering of brain is known as (a) Cranium (b) Condyle (c) Meninges (d) All of these

Human body contains how many ear ossciles? (a) 3 (b) 4 (c) 5 (d) 6

Human skull is (a) Monocondylic (b) Dicondylic (c) Tricondylic (d) Acondylic

Vertebral column in human body is present (a) Dorsally (b) Ventrally (c) Laterally (d) All of these

Which of the following is true about vertebral column? (a) Each vertebra in vertebral column has a central hollow protein (Neural canal) through which spinal cord pass. (b) The first vertebra in vertebral column is atlas and it articulates with the occipital condyle. (c) Vertebral column protects the spinal cord, supports the head and serves as the point of attachment for the ribs and musculature of the back. (d) All the above

The bone present on ventral midline of thorax is (a) Vertebral column (b) Ribs (c) Scapula (d) Sternum

Which of the following is incorrect about ribs? (a) Each rib is a thin and cat bone connected dorsally to the vertebral column and ventrally to the sternum. (b) Ribs has two articulation surfaces on its dorsal end which are called bicephalic. (c) Ventrally ribs are connected to sternum by elastic cartilage. (d) First 7 pairs are called true ribs. The 8,9 and \(10^{\star}\) pair is known as false (vertebracondral) ribs and the 2 pairs (11" and \(12^{\text {th }}\) ) are known as floating ribs.

Scapula is an example of (a) Long bone (b) Short bone (c) Flat bone (d) Irregular bone

Number of bones in the adult human body is (a) 206 (b) 406 (c) 106 (d) 306

Number of bones in human axial skeleton is (a) 120 (b) 142 (c) 80 (d) 206

The number of bones in the skull of man is (a) 14 (b) 28 (c) 8 (d) 22

Cranium of man is made up of (a) 8 bones (b) 12 bones (c) 16 bones (d) 14 bones

Vertebral column of human body is made up of (a) 33 vertebrae (b) 52 vertebrae (c) 45 vertebrae (d) 23 vertebrae

The number of bones in the vertebral column of man is (a) 32 (b) 26 (c) 35 (d) 20

The human vertebral formula is (a) C7T12L5S5Cd4 (b) C7T9L5S4Cd1 (c) C7T12L5S1Cd 1 (d) C7T12L4S4Cd1

The vertebra which bears the whole weight of the skull is (a) Atlas (b) Axis (c) Cervical (d) Sacral

In man, the ribs are attached to (a) Clavicle (b) Ileum (c) Sternum (d) Scapula

In case of most of the mammals including man and Giraffe, the numbers of cervical vertebrae are (a) 8 (b) 7 (c) 9 (d) 10

The eighth and ninth ribs are known as false ribs because their external portions are attached to (a) xiphisternum (b) Costa of 7 th rib (c) They have no costa (d) They are not true ribs

Number of bones in face is (a) 12 (b) 30 (c) 40 (d) 14

Axial skeleton is made up of (a) Skull only (b) Sternum only (c) Complete vertebral column (d) All of these

What is the right sequence of bones in the ear ossicles of a mammal starting from the tympanum inwards? (a) Malleus, Incus, Stapes (b) Malleus, Stapes, Incus (c) Incus, Malleus, Stapes (d) Stapes, Incus, Malleus

Malleus is a part of (a) Fore limbs of vertebrates (b) Reproductive organs of cockroach (c) Auditory ossicles of middle ear of human (d) Skull of frog

In human beings, the thoracic basket is composed of (a) Ribs and thoracic vertebrae (b) Ribs and sternum (c) Ribs, sternum and vertebrae (d) Ribs, sternum and thoracic vertebrae

The bone which is \(U\) -shaped is (a) Frontal (b) Vomer (c) Hyoid (d) Molar

The number of floating ribs in human body is (a) 6 pairs (b) 3 pairs (c) 5 pairs (d) 2 pairs

The foramen magnum, occipital condyles are found in (a) Parietal bone (b) Ethmoid bone (c) Sphenoid bone (d) Occipital bone

The acromion process articulates with the (a) Scapula (b) Clavicle (c) Ribs (d) Vertebral column

The number of lumbar vertebrae in human vertebral column is (a) 12 (b) 7 (c) 5 (d) 2

How many ribs are present in human beings? (a) 6 pairs (b) 9 pairs (c) 12 pairs (d) 15 pairs

The cup-shaped cavity for the articulation of the head of the femur is called (a) Glenoid cavity (b) Acetabulum (c) Obturator (d) Sigmoid notch

Ribs attached to sternum are (a) First seven pairs (b) All ten ribs (c) First ten rib pairs (d) First five rib pairs

A shallow depression in the scapula which receives the head of the upper arm bone is known as the (a) Acetabulum (b) Neural arch (c) Glenoid cavity (d) None of these

Patella, the sesamoid bone is also known as (a) Pisiform (b) Replacing bone (c) Knee cap (d) None of these

Humerus bone is situated in (a) Thigh (b) Lower arm (c) Upper arm (d) Shank

The cup-shaped structure of pelvic girdle, the acetabulum in man is formed by (a) Ilium, ischium and pubis (b) Ilium, ischium and cotyloid (c) Ilium and ischium (d) Ilium and cotyloid

The pectoral and pelvic girdles and the bones of limb form (a) Axial skeleton (b) Appendicular skeleton (c) Visceral skeleton (d) Outer skeleton

The total number of bones in your right arm is (a) 30 (b) 32 (c) 35 (d) 40

An acromian process is characteristically found in mammals in (a) Pelvic girdle (b) Pectoral girdle (c) Skull (d) Sternum

Which one of the following component is the part of pectoral girdle? (a) Acetabulum (b) Hilum (c) Sternum (d) Glenoid cavity

Pelvic girdle of human consist of (a) Ilium, ischium and pubis (b) Ilium, ischium and coracoid (c) Coracoid, scapula and clavicle (d) Ilium, coracoid and scapula

Innominate or hip bone is formed by the fusion of how many bones? (a) 2 (b) 3 (c) 4 (d) 5