Lecture Notes on Bone Cells and Muscle Contraction

These flashcards summarize key concepts relating to bone cell types, muscle contraction processes, and nervous system functions based on the lecture notes.

Osteoblasts do what?

Build bone.

Osteoblasts secrete __.

Collagen fibers.

The inorganic component of bone primarily consists of __.

Calcium phosphate.

Osteoprogenitor cells eventually become __.

Osteoblasts.

When osteoblasts are embedded in the matrix, they become __.

Osteocytes.

The process of breaking down bone by osteoclasts is called __.

Resorption.

Osteoclast activity is stimulated when blood calcium levels are __.

Low.

The __ nervous system stimulates skeletal muscle contraction.

Somatic.

Voltage gated sodium channels are responsible for __ during an action potential.

Depolarization.

The neurotransmitter released at the neuromuscular junction is __.

Acetylcholine (ACh).

Calcium binds to __ in smooth muscle contraction.

Calmodulin.

Endochondral ossification primarily produces __ bones.

Long.

The __ glial cells support the blood brain barrier.

Astrocytes.

Myelination in the peripheral nervous system is performed by __ cells.

Schwann.

Calcium ions trigger neurotransmitter release in the __ segment.

Transmissive.

The form of conduction in myelinated axons is called __ conduction.

Saltatory.

The thick and thin filament arrangement in skeletal muscle causes __.

Striations.

The two types of muscle are and muscle.

Skeletal; smooth.