HUBS 191 Progress Test |Question and Answers| 100% Correct

HUBS 191 Progress Test |Question and Answers| 100% Correct What makes up the axial skeleton? *Ans* skull, vertebral column, rib cage What is recruitment? *Ans* activating more motor units to make more force What are flat bones? *Ans* Thin plates of compact bone - some cancellous What are flat bones used for? *Ans* protection and muscle attachment What are irregular bones? *Ans* Variable in shape size and function What is depolarisation? *Ans* Membrane potential becomes less negative what causes depolarisation? *Ans* Na+ enters the cell What are the features of the saddle joint? *Ans* - biaxial - flexion and extension - abduction and adduction - circumduction - opposition - e.g. carpometacarpal joint (thumb) What does skeletal muscle do? *Ans* - develop force - control posture - resist movement of joints - under voluntary control - provide support and protection for soft internal organs - voluntary control over major openings - converts energy (in part) to heat to maintain core temperature - provide a major store for energy and protein What is membrane potential typical value? *Ans* -70mV What maintains the membrane potential? *Ans* sodium potassium pump what does a neutraliser muscle do? *Ans* eliminate an unwanted movement caused by another muscle What is hypotonic? what does it cause? *Ans* too much water in ECF causes cell to swell what is a continuous variable? *Ans* a variable that can take on any value where is the pubis located? *Ans* anterior aspect of the pelvic girdle articulates with the other pubis to form the pubic symphysis what is the structure of fibrocartilage? *Ans* collagen fibres form bundles throughout matrix orientation of fibres align with stresses function is to resist compression and tension what is plantar flexion? *Ans* toes pointing to the ground how is contraction of a muscle terminated? *Ans* Ca2+ levels fall in sarcoplasm what is a categorical variable? *Ans* can summarise variables into categories or groups what is inversion of the foot? *Ans* sole of foot faces towards midline