What is the key difference between movement and locomotion?

All locomotions are movements, but not all movements are locomotions.

Which type of movement involves pseudopodia formation in macrophages and leukocytes?

Amoeboid movement

True or False: Cardiac muscles are striated and under voluntary control.

False. Cardiac muscles are striated but involuntary, not controlled by nervous system.

Fill in the blank: Muscle tissue constitutes approximately _____% of adult body weight.

40-50

What are the three types of muscles based on location?
A) Skeletal, cardiac, smooth
B) Voluntary, involuntary, automatic
C) Striated, non-striated, branched
D) Fast, slow, intermediate

A) Skeletal, cardiac, smooth

Which protein masks active binding sites on actin filaments during rest?

Troponin

What happens to I-bands and A-bands during muscle contraction?

I-bands shrink while A-bands maintain their length.

True or False: White muscle fibers have more myoglobin than red fibers.

False. White fibers have less myoglobin and fewer mitochondria than red fibers.

How many bones comprise the human skeletal system?

206 bones

Fill in the blank: The vertebral column has _____ cervical vertebrae.

7

Which part of myosin contains ATPase enzyme and actin-binding sites?

Heavy meromyosin (HMM) globular heads

What initiates muscle contraction at the neuromuscular junction?
A) Dopamine release
B) Acetylcholine release
C) Calcium binding
D) ATP hydrolysis

B) Acetylcholine release

Which bones form the pectoral girdle?

Clavicle and scapula

True or False: Floating ribs are the first two pairs of ribs.

False. Floating ribs are the last two pairs (11th and 12th).

What causes muscle fatigue during repeated activation?

Lactic acid accumulation from anaerobic glycogen breakdown

Fill in the blank: The functional unit of muscle contraction is called _____.

Sarcomere

Which joint type contains synovial fluid for movement?
A) Fibrous joints
B) Cartilaginous joints
C) Synovial joints
D) Sutural joints

C) Synovial joints

What connects the femur to the pelvic girdle?

Acetabulum

True or False: Ciliary movement helps clear dust from trachea.

True. Synchronized cilia beating clears dust and foreign particles from airways.

Which disorder involves immune attack on acetylcholine receptors?

Myasthenia gravis

Fill in the blank: Each limb contains _____ bones in the appendicular skeleton.

30

What stores calcium ions in muscle fibers and releases them during contraction?

Sarcoplasmic reticulum