Exam 17: Muscle Contraction

The cell membrane of a muscle fiber is called the sarcoplasmic reticulum.

The purpose of creatine phosphate in muscle contraction is to:

Explain the role of ATP in muscle contraction.

In smooth muscle cells, the protein calmodulin takes the place of the sarcoplasmic reticulum found in striated muscle cells.

Match each term with its corresponding description regarding the sliding-filament theory. -Chemical released by the motor neuron that initiates the stimulus for a muscle contraction

The ability of muscle cells to respond to nerve stimuli is called:

In visceral smooth muscle, gap junctions join individual smooth muscle fibers into large, continuous sheets.

A muscle using anaerobic respiration would lower the pH of the blood passing through the muscle.

The difference between red and white fibers is the amount of glycogen.

The aerobic catabolic pathway that can supply energy to muscle cells is called fermentation.

Match each term with its corresponding definition or description. -The ability of a muscle to stretch

During which phase of the twitch contraction is there a triggering of the release of calcium ions into the sarcoplasm?

There are two types of isometric contractions: concentric contractions and eccentric contractions.

Because the heart is in almost constant contraction, its muscle cells have larger sarcoplasmic reticula that can hold higher concentrations of calcium ions.

Which of the following proteins found in myofilaments contains the cross-bridges?

Match each term with its corresponding definition or description. -Protein that joins with calcium ions to allow cross-bridges to form

Both the skin, or integument, system and the muscle system are important in maintaining the body temperature. The skin function is homeostatic in nature. Explain why the muscle function is not.

Glucose can be stored in the muscle as:

The sarcoplasmic reticulum in muscle cells is identical to the rough endoplasmic reticulum in other cells.

Shivering in response to a drop in body temperature is an example of a positive-feedback mechanism in the body.