Exploring Anatomy and Physiology

What are the basic units of muscle tissue?

• Muscle cells

• Tendon fibers

• Nerve fibers

• Muscle fibers

Describe the sliding filament theory of muscle contraction.

• The sliding filament theory describes muscle contraction as the process where actin and myosin filaments slide past each other, shortening the muscle fiber.

• Muscle fibers lengthen when they contract.

• Actin and myosin filaments do not interact during contraction.

• Muscle contraction occurs only through electrical impulses.

What are the three types of muscle tissue?

• Voluntary, Involuntary, Striated

• Tendons, Ligaments, Cartilage

• Epithelial, Connective, Nervous

• Skeletal, Cardiac, Smooth

Identify the main components of the skeletal system.

• Tendons, ligaments, fascia, adipose tissue

• Cartilage, synovial fluid, fascia, marrow

• Muscles, nerves, skin, blood

• Bones, cartilage, ligaments, tendons

What is the function of the axial skeleton?

• The axial skeleton functions to support and protect the central axis of the body.

• To facilitate movement of the limbs.

• To produce red blood cells.

• To store fat and energy reserves.

How do bones grow and remodel throughout life?

• Bones only grow during childhood and stop in adulthood.

• Bones are static and do not change after formation.

• Bone growth is solely determined by genetics without any external influences.

• Bones grow and remodel through a continuous cycle of resorption and formation, influenced by various factors throughout life.

What is the role of osteoblasts and osteoclasts in bone health?

• Osteoblasts and osteoclasts both build bone together.

• Osteoblasts build bone, while osteoclasts break down bone.

• Osteoblasts are responsible for muscle health, while osteoclasts manage fat.

• Osteoblasts break down bone, while osteoclasts build bone.

What are the different types of joints in the human body?

• Hinge, ball-and-socket, pivot, saddle, gliding, and condyloid joints.

• Screw, hinge, and clamp joints

• Elastic, rigid, and flexible joints

• Fixed, mobile, and semi-mobile joints

Explain the structure of a typical animal cell.

• A typical animal cell has a rigid cell wall and chloroplasts.

• A typical animal cell has a cell membrane, nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and ribosomes.

• Animal cells contain a large central vacuole and plasmodesmata.

• A typical animal cell is composed solely of cytoplasm and DNA.

What organelles are involved in protein synthesis?

• Mitochondria

• Lysosomes

• Golgi apparatus

• Ribosomes, endoplasmic reticulum, mRNA