BIOL 100 Quiz 5

skull

Which of the following bones is NOT part of the appendicular skeleton? A. humerus B. scapula C. skull D. femur

B

Which of the following does NOT have an effect on the amount of muscle tension that results from a muscle contraction? A. how frequently the motor units are stimulated B. the type of bone to which the muscle is attached C. the size of the motor units in the muscle D. the number of motor units activated at one time

A

Which of the following is characteristic of an isotonic muscle contraction but not an isometric muscle contraction? A. moves an object or part of the skeleton B. helps an individual maintain an upright position C. generates a force D. requires energy

cervical, thoracic, lumbar, sacral, coccygeal

Which of the following is the correct classification of vertebrae, from the skull to the pelvis? A. sacral, coccygeal, lumbar, thoracic, cervical B. cervical, thoracic, lumbar, coccygeal, sacral C. coccygeal, thoracic, lumbar, sacral, cervical D. cervical, thoracic, lumbar, sacral, coccygeal

C

Which of the following is true regarding fibrous joints? A. The bones are separated by a fluid-filled cavity. B. They include hinge joints and ball-and-socket joints. C. Fibrous joints present at birth between bones of the skull develop into sutures in the adult. D. They are freely movable.

D

Which of the following is true regarding parathyroid hormone (PTH)? A. It has the same function as calcitonin. B. It stimulates the release of growth hormone. C. It is released when blood calcium levels are high. D. It causes the breakdown of bone.

creatine phosphate

Fast-twitch fibers tend to rely on ________ for quick bursts of energy.

C

In characterizing cartilage, which of the following is correct? A. Cartilage functions to link muscles to bone. B. All types of cartilage are produced by osteocytes. C. Cartilage occurs where support under pressure is required. D. Cartilage fibers make up ligaments.

synergistic

Skeletal muscle groups that work together to create the same movement are referred to as

3, 1, 5, 4, 2

The following events are associated with muscle contraction. Which of the following best describes the order in which these events occur, following the initiation of a contraction by a nerve impulse? 1. Tubules transmit electrical impulses throughout muscle cell. 2. Myosin contacts actin and pulls it towards the center of the sarcomere. 3. Acetylcholine binds to receptors on the muscle. 4. Troponin-tropomyosin complex shifts to expose myosin binding sites. 5. Calcium is released from the sarcoplasmic reticulum. A. 3, 5, 1, 2, 4 B. 4, 2, 1, 3, 5 C. 3, 1, 5, 4, 2 D. 1, 3, 5, 2, 4

glucose

The primary energy source used by muscle cells to generate ATP is

C

At the end of the contractile period, energy from the breakdown of ATP is used to A. digest energy sources to generate new ATP for the next round of contractions. B. repair any muscle damaged during contraction. C. transport calcium back into the sarcoplasmic reticulum. D. produce lactic acid.

Produces digestive enzymes

All of the following are functions of the skeletal system except: A. Produces digestive enzymes B. Stores minerals C. Produces blood cells D. Protects internal organs

D

Bones continue to lengthen throughout childhood and adolescence because A. the activity of osteoblasts cannot be reduced until adulthood. B. ossification cannot occur until after puberty. C. primary ossification until death. D. a growth plate is present in each epiphysis.

D

Bones of trained athletes may be visibly thicker and heavier than those of non-athletes because A. non-athletes have a low parathyroid hormone rate. B. athletes blood calcium levels are lower than non-athletes. C. athletes produce more growth plates. D. weight-bearing exercise increases bone mass and strength.