FREE BIOLOGY AND STUDY GAMES ABOUT EXAM 3

PDF Download

FREE BIOLOGY AND STUDY GAMES ABOUT EXAM 3

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -39 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: What is the functional role of the T tubules?

Answer:

allows actin potential to travel from sarcolemma into sarcoplasmic reticulum

Question 2: Diffusion across the cell membrane results in depolarization

Answer:

Sodium-potassium ions

Question 3: _______ are cartilaginous joints

Answer:

Synchondroses

Question 4: Tendon sheaths _____

Answer:

act as friction reducing structures

Question 5: A neurotransmitter released at motor end plates by the axon terminals

Answer:

Acetylcholine Question 6: What is moving a limb away from the median plane of the body along the frontal plane called?

Answer:

abduction

Question 7: In the classification of joints, which of the following are true?

Answer:

All synovial joints are freely movable Question 8: Immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the _______ period during which the events of excitation-contraction coupling occur

Answer:

latent Question 9: Serves as the actual trigger for muscle contraction by removing the inhibition of the troponin

Answer:

Calcium ions

Question 10: That is the role of tropomyosin in skeletal muscle?

Answer:

Tropomyosin serves as a contraction inhibitor by blocking the myosin binding sites on the actin molecules.

Question 11: What produces the striation of a skeletal muscle?

Answer:

the arrangement of myofilaments

Question 12: Which of the following statements is true?

Answer:

Striated muscle cells are long and cylindrical with many nuclei

Question 13: Synarthrotic joints _____

Answer:

permit essentially no movement Question 14: Connective tissue sacs lined with synovial membranes that act as cushions in places where friction develops are called _____

Answer:

bursae

Question 15: The muscle cell membrane is called the _____

Answer:

sarcolemma Question 16: Excitation-contraction coupling requires which of the following substances?

Answer:

Ca2+ and ATP

Question 17: Articular cartilage found at the ends of the long bones serves to

Answer:

provide a smooth surface at the ends of synovial joints Question 18: What structure in skeletal muscle cells functions in calcium storage?

Answer:

Sarcoplasmic reticulum Question 19: An impulse from one nerve cell is communicated to a muscle fiber via the _____

Answer:

synapse

Question 20: Pointing the toes is an example of ____

Answer:

plantar flexion

Question 21: Articulations permitting only slight degrees of movement are ____

Answer:

amphiarthroses

Question 22: What is the functional unit of a skeletal muscle called?

Answer:

a sarcomere

Question 23: Compare and contrast skeletal, cardiac and smooth muscle

Answer:

Skeletal- striated, voluntary Cardiac- involuntary, striated, found in heart Smooth- voluntary, not striated, hollow organs

Question 24: An exceptionally strong stimulus can trigger a response

Answer:

Relative refractory period Question 25: On the basis of structural classification, which joint is fibrous connective tissue?

Answer:

syndesmosis Question 26: Synovial fluid is present in joint cavities of freely movable joints. Which of the following statements is true about synovial fluid?

Answer:

It contains hyaluronic acid

Question 27: Muscle tissue has all of the following properties except ______

Answer:

secretion