10: Muscle Tissues

Question 1

Muscle Tissue

Answer 1

• Characterized by the presence of elongated cells
  
  • muscle fibers
  • can contract (shorten) to create movement

Question 2

Types of Muscle Tissues

Answer 2

• Skeletal
• Smooth
• Cardiac

Question 3

Skeletal Muscle

Answer 3

• Usually under our conscious control
• considered voluntary

Question 4

Functions of Skeletal Muscle

Answer 4

• Body movements
• Maintaining posture
• Breathing
• Speaking
• Controlling waste elimination
• Regulate blood sugar levels
• Heat production
• Protection

Question 5

Smooth Muscle

Answer 5

• Under involuntary control
• Located
  
  • many visceral organs
  • iris
  • blood vessels
  • respiratory tubes
  • hair follicles
• Not striated
• Fusiform shape with a nucleus located close to center

Question 6

Functions of Smooth Muscle

Answer 6

• Motion of visceral organs (peristalsis)
• Controlling pupil size
• Blood flow
• Airflow
• Creating “goosebumps”

Question 7

Cardiac Muscle

Question 8

Functions of Cardiac Muscles

Question 9

Nervous Tissues

Answer 9

• Occurs in the brain, spinal cord, and peripheral nerves
• Two cell types
  
  • neurons
  • neuroglia

Question 10

Neurons

Answer 10

• Nerve cells
• contain cell body (soma) with the nucleus and most of cytoplasm

Question 11

Neuroglia