Chapter 9

Question 1

Functions of Muscle tissue?

Answer 1

Movement, Posture, Stabilizing joints, heat.

Question 2

Characteristics of muscle tissue?

Answer 2

Excitability, also termed responsiveness, is the ability of a cell to receive and respond to a stimulus by changing its membrane
potential. In the case of muscle, the stimulus is usually
a chemical-for example, a neurotransmitter released by a nerve cell.
• Contractility is the ability to shorten forcibly when adequately
stimulated. This ability sets muscle apart from all
other tissue types.
• Extensibility is the ability to extend or stretch. Muscle cells shorten when contracting, but they can be stretched, even
beyond their resting length, when relaxed.
• Elasticity is the ability of a muscle cell to recoil and resume its resting length after stretching.

Question 3

Nerve and blood supply of skeletal muscle tissue:

Answer 3

• one nerve, artery and vein serve each muscle.
• all enter and exit through central part of the muscle.
• Branch through CT sheaths.
• Skeletal muscle has huge blood supply due to high energy and oxygen demands. via arteries.
• Capillaries, smallest blood vessels in body, accommodate change in muscle length with cross links