4. Tissues & Histology

T, or transverse, tubules in skeletal muscle function to:

In a fully contracted sarcomere, the H zone:

What are the three main components of a neuromuscular junction?

Which type of muscle tissue is primarily responsible for causing vasoconstriction in blood vessels?

Which of the following muscle tissue components is predominantly made up of myosin?

Which of the following statements about myosin is correct?

Myofibrils are __________.

What is the main difference between muscle cells and nerve cells?

Which of the following correctly describes the initial step in the activation of smooth muscle contraction?

Which contractile organelles are found in the cytoplasm of muscle cells?

In the context of the sliding filament theory, what function do the proteins actin and myosin perform?

Which of the following is a characteristic of a type II muscle fiber?

What are the four common characteristics of all muscle tissues?

Muscular tissue consists of which type of cells or fibers?

Which organelle in skeletal muscle fibers stores calcium ions necessary for muscle contraction?