Locomotion and Movement

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What is the total number of bones in the human body?

206 (correct)

208

210

212

How many bones are present in each leg?

35

20

30 (correct)

25

What is the purpose of the pelvic girdle bones?

To support the upper limbs

To form the vertebral column

To protect the heart

To articulate the lower limbs (correct)

What is the function of the clavicle in the pectoral girdle?

To act as a point of attachment for the upper limbs and the arm muscles Signup and view all the answers

What is the name of the cavity formed by the fusion of the ilium, ischium, and pubis bones?

Acetabulum Signup and view all the answers

How many bones are present in the vertebral column?

26 Signup and view all the answers

What is the scapula situated in?

The dorsal part of the thorax Signup and view all the answers

What is the name of the depression below the acromion?

Glenoid cavity Signup and view all the answers

What is the name of the joint that connects the two hip bones ventrally?

Pubic symphysis Signup and view all the answers

How many bones make up each arm?

30 Signup and view all the answers

What is the name of the process that projects from the spine of the scapula?

Acromion process Signup and view all the answers

What is the common name of the clavicle?

Collar bone Signup and view all the answers

How many thoracic vertebrae are there in the human body?

12 Signup and view all the answers

Which of the following bones is part of the pectoral girdle?

Clavicle Signup and view all the answers

What is the name of the bone that connects the arm bone to the body?

Clavicle Signup and view all the answers

Which of the following bones is NOT part of the appendicular skeleton?

Vertebral column Signup and view all the answers

What is the name of the flat, triangular bone that forms the back of the shoulder?

Scapula Signup and view all the answers

How many hyaline cartilage ribs are there in the human body?

7 Signup and view all the answers

What is the primary function of excitability in muscles?

To enable muscles to respond to stimuli Signup and view all the answers

What is the term for the ability of muscles to recoil or bounce back to their original length?

Elasticity Signup and view all the answers

Which type of muscle has tapering ends and lacks striations?

Smooth muscle Signup and view all the answers

What is the term for the ability of muscles to stretch beyond their original length?

Extensibility Signup and view all the answers

Which type of muscle is present only in the heart and aids in the cardiac cycle?

Cardiac muscle Signup and view all the answers

What is the primary function of contractility in muscles?

To enable muscles to shorten and return to their original state Signup and view all the answers

What is the primary function of the action potential in muscle contraction?

To generate an electrical impulse that propagates on the muscle fiber Signup and view all the answers

What is the role of calcium ions in the cross-bridge cycle?

To bring about the contraction of the muscle Signup and view all the answers

What is the result of the binding of calcium ions to troponin?

The exposure of the myosin-binding site Signup and view all the answers

What is the energy source for the myosin head during the cross-bridge cycle?

ATP Signup and view all the answers

What is the term for the ability of muscles to return to their original shape after contraction?

Elasticity Signup and view all the answers

What is the term for the ability of muscles to generate tension?

Contractility Signup and view all the answers

What is the primary reason for tetanic contraction in muscles?

The electric impulses come too fast, not allowing the muscle to relax Signup and view all the answers

What is the role of Ca2+ in the cross-bridge cycle?

It causes a conformational change in troponin, exposing the myosin-binding site Signup and view all the answers

What is the result of the myosin head binding to the actin filament?

The actin filament is pulled, causing muscle contraction Signup and view all the answers

What is the significance of the neuromuscular junction?

It is the site where the motor neuron meets the muscle fibre Signup and view all the answers

What is the function of the HMM in the myosin molecule?

It forms the cross-arm of the myosin molecule Signup and view all the answers

What is the result of the myosin head hydrolysing ATP?

The myosin head is full of energy Signup and view all the answers