B1.3 Muscle Review

What happens to the sarcomere during muscle contraction?

• It lengthens.

• It shortens.

• It remains the same.

• It disappears.

Muscle contractions can be categorized as isometric, isotonic concentric, isotonic eccentric, and isokinetic. Which is an example of an isometric contraction?

• Lifting a weight

• Holding a plank position

• Lowering a weight

• Running

What strategies can prevent atrophy and promote hypertrophy?

• Inactivity and poor diet

• Regular exercise and proper nutrition

• Excessive rest and high sugar intake

• Avoiding protein and fats

Which type of muscle contraction involves shortening of the muscle?

• Isometric

• Isotonic concentric

• Isotonic eccentric

• Isokinetic

What is the role of the synapse in a motor neuron?

• It stores energy.

• It transmits signals to muscles.

• It provides structural support.

• It produces hormones.

What is the primary function of dendrites in a neuron?

• To transmit signals away from the cell body

• To receive signals from other neurons

• To store nutrients

• To produce energy

What is the main characteristic of isokinetic muscle contractions?

• Constant speed

• Constant force

• Constant length

• Constant tension

What are the primary roles of skeletal muscle in the body?

• Pump blood through the body

• Facilitate voluntary movement and maintain posture

• Transport nutrients within the body

• Produce hormones for metabolic regulation

Which type of muscle contraction involves the muscle length remaining constant while generating force?

• Isometric

• Isotonic concentric

• Isotonic eccentric

• Isokinetic

What is the function of a synergist muscle during movement?

• Generates the primary force for movement

• Relaxes to allow the antagonist to contract

• Prevents unwanted secondary movements at the joint

• Stabilizes the opposing muscle