26 Questions
What is the function of the epimysium in skeletal muscle?
Covers the entire skeletal muscle
How are skeletal muscle cells different from smooth muscle cells in terms of appearance?
Skeletal muscle cells are striated while smooth muscle cells have no striations
What is the main difference between tendons and aponeuroses in skeletal muscle attachments?
Tendons are cord-like structures, while aponeuroses are sheet-like structures
Where are myofibrils found in skeletal muscle cells?
Myofibrils are aligned within the muscle cells to give distinct bands
What is the specialized plasma membrane surrounding skeletal muscle cells?
Sarcolemma
What is the role of the sarcoplasmic reticulum in skeletal muscle cells?
Specialized smooth endoplasmic reticulum
What are the functions of bones in the human body?
Support of the body, protection of soft organs, movement due to attached skeletal muscles, storage of minerals and fats, blood cell formation
How many bones are there in the human skeleton?
206 bones
What are the two basic types of bone tissue?
Compact bone and spongy bone
Give an example of a long bone from the human body.
Femur, humerus
What is the function of the medullary cavity in long bones?
Contains yellow marrow (mostly fat) in adults; contains red marrow (for blood cell formation) in infants
What are bone markings and what is their significance?
Surface features of bones that are sites of attachments for muscles, tendons, and ligaments, as well as passages for nerves and blood vessels; they help in understanding bone structure and function
What is the function of osteocytes in bone tissue?
Mature bone cells responsible for maintaining bone structure
Explain the process of bone growth at the epiphyseal plates during childhood.
New cartilage is continuously formed, older cartilage becomes ossified, cartilage is broken down and replaced by bone
What are the three types of bone cells and their functions?
Osteocytes (mature bone cells), Osteoblasts (bone-forming cells), Osteoclasts (bone-destroying cells breaking down bone matrix for remodeling and calcium release)
How does bone remodeling contribute to bone growth and maintenance?
Bone remodeling is a process involving both osteoblasts and osteoclasts to reshape bone structure, repair damage, and release calcium into the bloodstream
What are the three parts that make up the axial skeleton?
Skull, Vertebral column, Bony thorax
Which bone in the skull is not joined by sutures and is attached by a freely movable joint?
Mandible
What is the function of paranasal sinuses in the skull?
Lighten the skull, Give resonance and amplification to voice
What is the only bone in the body that does not articulate with another bone?
Hyoid Bone
What are fontanelles and what is their function?
Fibrous membranes connecting the cranial bones; Allow the brain to grow, Convert to bone within 24 months after birth
How many pair of fused bones make up the hip bones in the pelvic girdle?
Three
What is the total weight of the upper body resting on in the pelvis?
Pelvis
How many bones are there in the forearm?
Two
How many strong arches are formed by the arrangement of bones in the foot?
Three
Which bone forms the thigh in the lower limbs?
Femur
This quiz covers the different factors impacting bone growth, the functions of bones in the skeletal system, and details about the bones in the human body. Explore topics such as parts of the skeletal system, axial and appendicular skeleton, bone tissue types, and more.
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