FREE AND STUDY GAMES ABOUT A P CHAPTER 6 EXAM

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QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -33 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: During skeletal muscle contraction, to what do myosin heads bind?

Answer:

actin filaments

Question 2: The sarcoplasmic reticulum stores this chemical

Answer:

calcium ions Question 3: Which of these muscles is located on the ventral (anterior) side of the body?

Answer:

pectoralis major Question 4: Gap between the axon terminals and the plasma membrane of a neighboring muscle cell

Answer:

synaptic cleft

Question 5: Muscle tissue that activates arrector pili muscles to stand hairs on end

Answer:

smooth muscle tissue

Question 6: Enzyme that breaks down acetylcholine (ACh)

Answer:

acetylcholinesterase Question 7: The effect of the neurotransmitter on the muscle cell membrane is to temporarily modify its permeability of ions such as Na+ and K+.

Answer:

TRUE

Question 8: Which of the following is an example of an isometric contraction?

Answer:

pushing against an immovable wall Question 9: A motor neuron and all of the skeletal muscle fibers it stimulates are termed a

________.

Answer:

motor unit

Question 10: The formation of cross bridges requires both calcium ions and ATP

Answer:

TRUE Question 11: A neuromuscular junction consists of one neuron and all the skeletal muscles it stimulates.

Answer:

FALSE Question 12: Which one of the following is composed mostly of the protein myosin?

Answer:

thick filaments

Question 13: Which of the following is a type isometric exercise in which muscles increase in size and strength?

Answer:

lifting weights

Question 14: Anaerobic glycolysis requires ________ to make ATP.

Answer:

glucose only

Question 15: A sarcomere is ________.

Answer:

the contractile unit between two Z discs

Question 16: The deltoid is a prime mover of arm adduction.

Answer:

FALSE

Question 17: Which is NOT a function of the muscular system?

Answer:

blood cell formation Question 18: All muscles have at least two attachments: the origin and the insertion.

Answer:

TRUE Question 19: Which one of the following is NOT a criterion generally used in naming muscles?

Answer:

method of attachment of the muscle to bone

Question 20: Chemical that enters a muscle cell upon excitation

Answer:

sodium ions

Question 21: Why are calcium ions necessary for skeletal muscle contraction?

Answer:

Calcium ions trigger the binding of myosin heads to actin filaments Question 22: Creatine phosphate (CP) functions within the muscle cells by ________.

Answer:

storing energy that will be transferred to ADP to resynthesize ATP as needed Question 23: Electrical current that travels the length of the sarcolemma that results in the contraction of the muscle fiber

Answer:

action potential Question 24: What enzyme breaks down acetylcholine into acetic acid and choline to prevent continued contraction of the muscle fiber?

Answer:

acetylcholinesterase Question 25: What creates the alternating light and dark bands that provides the striation pattern on skeletal muscle tissue?

Answer:

A bands and I bands

Question 26: The prime mover of arm abduction is the ________ muscle.

Answer:

deltoid Question 27: Muscle tissue that maintains posture, body position, and stabilizes joints

Answer:

skeletal muscle tissue Question 28: Striated involuntary muscle tissue is classified as ________ muscle.

Answer:

cardiac