Question

select the matching pairs. click the bottom right arrow to go to the next set.

matching:

• actin binding sites
• sarcoplasmic reticulum
• function of t tubule
• motor end plate
• getting action potential to sr
• has receptors for ach
• tropomyosin covers the ___
• ca++ is stored in ___

Explanation:

Identify the matching elements

We need to match the terms on the left side of the table with their corresponding descriptions or functions on the right side.

Left items:

1. Actin binding sites
2. Function of T tubule
3. getting Action Potential to SR
4. Tropomyosin covers the \_\_\_\_\_\_

Right items:

• Sarcoplasmic reticulum
• Motor end plate
• Has receptors for Ach
• Ca++ is stored in \_\_\_\_\_\_

Analyze calcium storage and release

The sarcoplasmic reticulum (SR) is a specialized endoplasmic reticulum in muscle cells that stores calcium ions (\(\text{Ca}^{2+}\)).

• "Ca++ is stored in \_\_\_\_\_\_" matches with Sarcoplasmic reticulum.

Analyze neuromuscular junction components

The motor end plate is the specialized region of the sarcolemma at the neuromuscular junction.

• Motor end plate matches with "Has receptors for Ach" (acetylcholine receptors are concentrated here).

Analyze T-tubule function

Transverse tubules (T-tubules) are invaginations of the sarcolemma that conduct action potentials deep into the muscle cell.

• "Function of T tubule" matches with getting Action Potential to SR.

Analyze thin filament regulation

In a relaxed muscle, tropomyosin physically blocks the active myosin-binding sites on actin.

• "Tropomyosin covers the \_\_\_\_\_\_" matches with Actin binding sites.

Answer:

Left Item	Right Item
Function of T tubule	getting Action Potential to SR
Ca++ is stored in \_\_\_\_\_\_	Sarcoplasmic reticulum
Motor end plate	Has receptors for Ach