anatomy exam 2 practice test Which of the following is an example of an intramembranous bone(s)?

Bones of a synovial joint are held together by __________.

a joint capsule

Myofibrils are composed primarily of __________.

actin and myosin

What are osteoclasts?

bone breaking

Which of these events occurs first in muscle fiber contraction?

Acetylcholine is released from the axon of the motor neuron.

What is the location of the vesicles containing neurotransmitter molecules?

At distal end of motor axon

Which of the following is an example of an intramembranous bone(s)?

Bones of the cranium

Which of these options lists the structures in order, from smallest to largest?

Filament, myofibril, muscle fiber, fascicle, muscle

Which of the following is not a step in endochondral bone formation?

Hyaline cartilage changes to adipose tissue.

Which of the following does not describe the function(s) of the skeletal system?

It generates the movements of the limbs.

A six-month-old baby is admitted to the hospital with a broken bone. This is the third fracture in the otherwise healthy child. The parents are arrested on charges of child abuse. The defense lawyer gets the charges dropped after the results of genetic tests indicate which of the following conditions?

Osteogenesis imperfecta

What is the effect of exercise on bones?

Results in thickening and strengthening bones

Which of the following is not a synovial joint?

Symphysis

Which of the following are examples of types of fibrous joints?

Syndesmosis, suture, and gomphosis joints

vIt is possible to determine if a child's long bone is growing by examining a radiograph of the bone and looking for a(n) _________.

epiphyseal plate

The amount of oxygen that liver cells require to support the conversion of lactic acid to glucose or glycogen is called the __________.

oxygen debt

In a child, a vitamin D deficiency results in __________, whereas a vitamin A deficiency results in __________.

rickets; retardation of bone development

Which statement describes a sarcomere?

A segment of a muscle fiber

Muscle fibers generally have only one motor end plate, but a single motor neuron can innervate many different muscle fibers in a group. How does this arrangement affect muscle contraction?

A signal from one motor neuron can potentially stimulate multiple fibers in a group to contract, generating more force.