Grade 11 : Biology - Locomotion and Movement (Set 2)

Question 1

Which type of cellular movement is primarily exhibited by macrophages and leukocytes in human blood?

Accepted Answer

A) Amoeboid movement

Answer

B) Ciliary movement

Answer

C) Flagellar movement

Answer

D) Muscular movement

Question 2

Ciliary movement in humans is primarily observed in which of the following body structures?

Accepted Answer

B) Trachea and fallopian tubes

Answer

A) Cardiac muscle tissue

Answer

C) Skeletal muscles of limbs

Answer

D) Stomach mucosa

Question 3

Which protein forms the thick filaments within a skeletal muscle myofibril?

Accepted Answer

C) Myosin

Answer

A) Actin

Answer

B) Troponin

Answer

D) Tropomyosin

Question 4

What is the functional unit of contraction inside a muscle fiber?

Accepted Answer

D) Sarcomere

Answer

A) Fascia

Answer

B) Myofibril

Answer

C) Cross-bridge

Question 5

Which ion binds to troponin during muscle contraction to expose active binding sites on actin filaments?

Accepted Answer

A) Calcium ions ($Ca^{2+}$)

Answer

B) Sodium ions ($Na^{+}$)

Answer

C) Potassium ions ($K^{+}$)

Answer

D) Magnesium ions ($Mg^{2+}$)

Question 6

What is the total number of bones present in the adult human axial skeleton?

Accepted Answer

B) 80

Answer

A) 126

Answer

C) 206

Answer

D) 60

Question 7

How many cervical vertebrae are present in almost all mammals, including humans?

Accepted Answer

C) 7

Answer

A) 12

Answer

B) 5

Answer

D) 1

Question 8

Which bone in the human shoulder girdle is commonly referred to as the collar bone?

Accepted Answer

A) Clavicle

Answer

B) Scapula

Answer

C) Sternum

Answer

D) Humerus

Question 9

What type of joint is present between the first cervical vertebra (atlas) and second cervical vertebra (axis)?

Accepted Answer

B) Pivot joint

Answer

A) Hinge joint

Answer

C) Gliding joint

Answer

D) Saddle joint

Question 10

The elbow joint is a classic example of which type of synovial joint?

Accepted Answer

C) Hinge joint

Answer

A) Pivot joint

Answer

B) Ball and socket joint

Answer

D) Gliding joint

Question 11

Which fibrous connective tissue structure attaches a skeletal muscle directly to a bone?

Accepted Answer

A) Tendon

Answer

B) Ligament

Answer

C) Cartilage

Answer

D) Fascia

Question 12

Which connective tissue structure connects one bone directly to another bone at a joint?

Accepted Answer

B) Ligament

Answer

A) Tendon

Answer

C) Myofibril

Answer

D) Perimysium

Question 13

Which age-related skeletal disorder is characterized by decreased bone mass and increased risk of fractures due to reduced estrogen levels?

Accepted Answer

C) Osteoporosis

Answer

A) Gout

Answer

B) Arthritis

Answer

D) Myasthenia gravis

Question 14

Rapid, sustained involuntary muscle spasms caused by low calcium levels ($Ca^{2+}$) in body fluids is known as:

Accepted Answer

D) Tetany

Answer

A) Muscular dystrophy

Answer

B) Myasthenia gravis

Answer

C) Osteoarthritis

Question 15

Which region/band of the sarcomere contains exclusively thin (actin) filaments?

Accepted Answer

A) I-band

Answer

B) A-band

Answer

C) H-zone

Answer

D) M-line

Question 16

In a resting muscle fiber, the central region of the thick filament that is not overlapped by thin filaments is called the:

Accepted Answer

B) H-zone

Answer

A) Z-line

Answer

C) I-band

Answer

D) Sarcomere

Question 17

What is the plasma membrane enclosing a skeletal muscle fiber called?

Accepted Answer

C) Sarcolemma

Answer

A) Sarcoplasmic reticulum

Answer

B) Perichondrium

Answer

D) Endosteum

Question 18

Which pairs of ribs in the human rib cage are known as floating ribs because they lack ventral attachment to the sternum?

Accepted Answer

D) 11th and 12th pairs

Answer

A) 1st to 7th pairs

Answer

B) 8th, 9th, and 10th pairs

Answer

C) 1st and 2nd pairs

Question 19

An autoimmune neuromuscular disorder affecting the neuromuscular junction and leading to fatigue and paralysis of skeletal muscle is:

Accepted Answer

A) Myasthenia gravis

Answer

B) Muscular dystrophy

Answer

C) Rheumatoid arthritis

Answer

D) Gout

Question 20

The knee joint in humans is categorized under which class of synovial joints?

Accepted Answer

B) Hinge joint

Answer

A) Ball and socket joint

Answer

C) Pivot joint

Answer

D) Saddle joint

Grade 11 : Biology - Locomotion and Movement (Set 2)