BIO 112 Ch. 8 Quiz

Which of the following is a function of the muscular system?

• Digestion

• Blood circulation

• Support and movement

• Hormone production

What is the basic structural unit of a muscle fiber (cell)?

• Sarcomere

• Myofibril

• Sarcolemma

• Mitochondria

Which of the following lists parts of the sarcomere?

• Z line, M line, A band, I band, H zone

• Nucleus, Cytoplasm, Cell membrane

• Axon, Dendrite, Synapse

• Epidermis, Dermis, Hypodermis

Which of the following correctly describes the process of signal transmission at the neuromuscular junction leading to muscle contraction?

• Neurotransmitter release, receptor activation, depolarization, and muscle contraction

• Muscle contraction, receptor activation, neurotransmitter release, and depolarization

• Receptor activation, neurotransmitter release, muscle contraction, and depolarization

• Depolarization, muscle contraction, neurotransmitter release, and receptor activation

What is the stimulus for muscle contraction?

• Nerve impulse and calcium ions

• ATP and glucose

• Hormones and enzymes

• Electrical signals and potassium ions

Compare aerobic and anaerobic respiration.

• Aerobic respiration requires oxygen, while anaerobic respiration does not.

• Anaerobic respiration produces more ATP than aerobic respiration.

• Both aerobic and anaerobic respiration occur in the mitochondria.

• Aerobic respiration occurs only in plants, while anaerobic respiration occurs only in animals.

Tags

NGSS.HS-LS2-3

How does exercise effect muscle?

• Increases muscle strength and size

• Decreases muscle strength and size

• Has no effect on muscle

• Weakens the muscle

Tags

NGSS.HS-LS2-3

What is the structure of smooth muscle?

• It is composed of spindle-shaped cells with a single nucleus and no striations.

• It is composed of cylindrical cells with multiple nuclei and striations.

• It is composed of branched cells with a single nucleus and intercalated discs.

• It is composed of flat cells with multiple nuclei and no striations.

Where is the insertion of a muscle?

• The insertion of a muscle is at the bone it moves.
• The insertion of a muscle is at the joint it stabilizes.
• The insertion of a muscle is at the tendon it connects.
• The insertion of a muscle is at the skin it affects.

Which are connective tissue coverings of a muscle?

• Dermis, epidermis, and hypodermis
• Epimysium, perimysium, and endomysium
• Cartilage, bone, and blood
• Tendons, ligaments, and fascia