through the urinary tract. C) Its function is largely under involuntary control. D) It is a kind of connective tissue. E) It is responsible for locomotion. Answer: e Level: 1 5. Which of the following actions is caused by contraction of skeletal muscle? A) contraction of the heart B) moving your feet in walking C) movement of food through the G.I. tract D) emptying of the urinary bladder E) vasoconstriction Answer: b Level: 2 6. Smooth muscle and cardiac muscle are similar in that they
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Found only in the heart‚ cardiac muscle is responsible for pumping blood throughout the body. Cardiac muscle tissue cannot be controlled consciously‚ so it is an involuntary muscle. While hormones and signals from the brain adjust the rate of contraction‚ cardiac muscle stimulates itself to contract. The natural pacemaker of the heart is made of cardiac muscle tissue that stimulates other cardiac muscle cells to contract. Because of its self-stimulation‚ cardiac muscle is considered to be autorhythmic
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charges must be equal to the total number of negative charges . 8. Name four of the seven functions given for electrolytes: a. Cofactors for enzymes b. Action potentials in neuron and muscle cells c. Muscle contraction d. Secretion and action of hormones and neurotransmitters 9. Osmosis: When more solute particles are added to one side of a container with a selectively permeable membrane‚ which way will the water move? From the left to the right
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potential in skeletal muscle travels through the muscle via T-tubules true 15. Ca2+ is essential for normal contraction of skeletal muscle. true 16. A twitch of one skeletal muscle fibre is an example of a graded response. TRUE 17. A motor unit is a single motor neurone and the muscle fibres that it innervates. true 18. The three phases of a muscle twitch are described as latent‚ contraction and relaxation. true 19. The force exerted on an object by
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Content Frame PhysioEx 9.0 PhysioEx 9.0 is easy-to-use laboratory simulation software that consists of 12 exercises containing 63 physiology lab activities. Exercise 1: Cell Transport Mechanisms and PermeabilityDownload the Exercise 1 Review Sheet:PDF Download Exercise 1 Review Sheet PDFRTF Download Exercise 1 Review Sheet RTF Exercise 2: Skeletal Muscle PhysiologyDownload the Exercise 2 Review Sheet:PDF Download Exercise 2 Review Sheet PDFRTF Download Exercise 2 Review Sheet RTF
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Name: GEBRIE; GARCIA ANDI Exercise 2: Skeletal Muscle Physiology: Activity 6: The Skeletal Muscle Length-Tension Relationship Lab Report Pre-lab Quiz Results You scored 100% by answering 5 out of 5 questions correctly. 1. During an isometric contraction You correctly answered: d. the skeletal muscle is generating force‚ but it remains at a fixed length. 2. The force that results from muscles being stretched is You correctly answered: a. passive force. 3. Active force You correctly answered: b. is
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Chapter 38: Activity and Exercise! Test Bank! ! MULTIPLE CHOICE! ! 1.! The coordinated efforts of the musculoskeletal and nervous system maintain balance‚ posture‚ and body alignment. Body alignment refers to! ! a.! A low center of gravity balanced over a wide base of support.! b.! The result of weight‚ center of gravity‚ and balance.! c.! The relationship of one body part to another.! d.! The force that occurs in a direction to oppose movement.! ! !! ANS: C
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of exercise Hypertrophy- muscles can increase in size (growth) with an increase in activity Muscles fibre arrangement Fusiform muscles Fusiform muscles run the length of the muscle belly. They are designed for mobility because they produce contractions over a large range‚ yet they produce low force (eg. Sartorius and biceps) Pennate muscles Pennate muscles run at angles to the tendons. These muscles are designed for strength and power. Unipennate muscles- found on one side of a central
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d. What was investigated? i. Effects of stimulus frequency and intensity on contraction-the more intensity‚ the higher the twitch tension. The more freq- the more twitch tension (By ~4.0pps we start to see summation of the twitches and by ~15pps we see no single twitches because the muscle has reached tetanic contraction) ii. Effects of Ach blocker- tubocurare- twitch tension declines. Blocks Ach and no muscle contraction. It is necessary for acetylcholine to bind to receptors in order for sodium
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neurotransmitters d. Muscle contraction 9. Osmosis: When more solute particles are added to one side of a container with a selectively permeable membrane‚ which way will the water move? From the side with more water and less solute to the side with less water and more solute. 10. What happens to a patient’s red blood cells when the following solutions are given: a. Hypotonic solution The cell will bust or haemolyse b. Hypertonic solution The cell will crenate c. Isotonic
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