Physiology Muscle Practice test

lacunae

small cavities in bone that contain osteocytes

lamella

weight-bearing, column-like matrix tubes composed mainly of collagen

continuous stimulation of the postsynaptic membrane.

Lack of acetycholinesterase in synaptic cleft would result in

myofilament, myofibril, muscle fiber, fascicle, muscle

List structures of muscle from smallest to largest

respond to stimulation by the nervous system

Muscles exhibit the property of excitability, that means they

original polarity of the cell is restored

Once repolarization of the cell membrane is complete, the

I band

The ________ contains only actin filaments

actin myofilaments

The active sites usually covered by tropomyosin, to which cross bridges attach are on the

the epiphyseal plate is completely replaced with bone tissue

The longitudinal growth of bone stops when

contraction with no relaxation

A drug that interferes wit the active transport of calcium ions from the sarcoplasm back into the sarcoplasmic reticulum would result in

Z discs

A sarcomere is the distance between two

Canaculi

A small passageway connecting neighboring osteocytes in an osteon is

rapid degradation of acetycholine

Abundance of acetycholinesterase in synaptic cleft would result in

3,2,1,5,4

Arrange the following events in endochondral ossification in order: 1. Cartilage matrix is calcified and chondrocytes die 2. Chondrocytes hypertrophy 3. Cartilage model forms 4. Osteoblasts deposit bone on the surface of the calcified cartilage called the primary ossification center 5. Blood vessels from periosteum invade calcified cartilage bringing in osteoblasts and osteoclasts

M line

Attachment site for myosin

positively

The outside of the plasma membrane is _______ charged in comparison to the inside of the resting plasma membrane

osteoblasts and osteoclast activity

The remodeling of bone is a function of

hyaline cartilage

The type of cartilage associated with bone function and development is

proliferation, hypertrophy, calcification, cell death, ossification, remodeling

What is the sequence of events that produces growth at the epiphyseal plate

A protein found along the groove of the F-actin double helix

What is tropomyosin

cardiac and smooth muscle

What type of muscle tissue is autorhythmic

They bind to troponin

Which is not a property of the myosin head 1. They form cross bridges with the active sites of actin 2. They have a hinge region to bend and straighten 3. They bind to troponin 4. They have ATPase activity 5. They bind to ATP

treppe

can contribute to muscle efficiency, may be due to an increase in calcium ions, is an example of a graded response, is achieved during warm up exercises

incomplete tetanus

muscle fibers partially relax between contraction

calcitonin

osteoclast activity would be decreased by