Sample Midterm 2

Sample Midterm 2 - Sample Midterm 2 - NPB 101 _ 1. The...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Sample Midterm 2 - NPB 101 ____ 1. The region between two Z lines is a a. muscle fiber. b. myofibril. c. myofilament. d. sarcomere. e. sarcoplasmic reticulum. ____ 2. Thick filaments in skeletal muscle are composed of a. actin. b. troponin and tropomyosin. c. myosin. d. actin, troponin, and tropomyosin. e. All of these answers. ____ 3. When skeletal muscle relaxes a. the A band shortens. b. the I band broadens. c. the H zone shortens. d. (a) and (c), above. e. (b) and (c), above. ____ 4. Binding of __________ to myosin permits cross-bridge __________ between actin and myosin. a. ATP, binding. b. ATP, detachment. c. calcium, binding. d. calcium, detachment. e. None of these answers. ____ 5. Which of the following statements concerning cross bridges of skeletal muscle is incorrect? Cross bridges a. are formed by the globular heads of the myosin molecules as they protrude from the thick filaments. b. bend during muscle contraction. c. bind to actin during muscle contraction. d. are not found in the I band. e. bind with troponin and tropomyosin during muscle contraction to pull them away from the actin helical chain. ____ 6. Which of the following statements about smooth muscle is false? a. smooth muscle is often found in the walls of hollow organs and tubes such as blood vessels and the intestines. b. smooth muscle is striated. c. smooth muscle contains thin filaments that slide relative to stationary thick filaments in response to a rise in cytosolic Ca++. d. smooth muscle lacks the transverse (T) tubule organization that is characteristic of skeletal muscle. e. none of the above statements are false.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
____ 7. Muscle tension depends on a. the number of motor units recruited. b. the frequency of stimulation. c. extent of fatigue. d. Both (a) and (b), above. e. (a), (b) and (c), above. ____ 8. Which of the following characteristics are shared by all three types of muscle tissues? a. each one contains myosin and actin. b. each one contains gap junctions.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/29/2012 for the course NPB 101 taught by Professor Fuller,charles/goldberg,jack during the Winter '08 term at UC Davis.

Page1 / 5

Sample Midterm 2 - Sample Midterm 2 - NPB 101 _ 1. The...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online