Prelims 1 Flashcards
Which of the following is the synapse between a somatic motor neuron and a skeletal muscle fiber?
Neuromuscular Junction (NMJ)
What organelle digests worn-out organelles and extracellular materials?
Lysosome
In describing the special properties of muscular tissues, contractility refers to:
The ability to generate tension to do work
The ___ is the type of body fluid that is found between cells in tissues
Interstitial Fluid
An organelle is…
A cellular structure with a specific function
Type of muscle contraction where there is constant tension, but the muscle fiber length shortens?
Concentric Contraction
Not considered to be a flat bone
Vertebrates
Skin aging may be attributed to which of the following?
- Loss of elasticity of the skin
- Loss of fat in the dermis
- Decrease in the number of collagen bundles
This substance gives bone tissues its distinct hardness
Hydroxyapatite
The following are true of the parathyroid hormone, EXCEPT:
produce in the thyroid gland
The following are functions of the skeletal system, EXCEPT
production of calcitonin
When someone tells you to lie on your stomach, this special movement is
Pronation
Muscle contraction occurs because cross-bridges attach to and “walk” along the thin filaments at both ends of sarcomere, what happens to the sarcomere in this situation?
It expands
What muscle type has a shape that is elongated with blunt ends?
Skeletal muscle
It is the structural unit of compact bone
osteon
