CSCS Ch 6 Questions

The mean arterial pressure is defined as the a. average blood pressure throughout the cardiac cycle b. average of the systolic and diastolic blood pressures c. average systolic blood pressure during exercise d. average of blood pressure and heart rate

a. average blood pressure throughout the cardiac cycle

Primary training adaptations of elite aerobically trained athletes include which of the following? I. Increased maximal oxygen uptake II. decrease blood lactate concentration III. increased running economy IV. decreased capillary density a. I and III only b. II and IV only c. I, II, and III only d. II, III, and IV only

c. I, II, and III only

Which of the following does not normally increase during aerobic exercise session? a. end-diastolic volume b. cardiac contractility c. cardiac output d. diastolic blood pressure

d. diastolic blood pressure

A 17 year old high school cross country runner has been training aerobically for six months in preparation for the upcoming season. Which of the following adaptations will occur in the muscles during that time? a. increases concentration of glycolytic enzymes b. hyperplasia of Type II fibers c. transformation from Type I to Type II fibers d. hypertrophy of Type I fibers

d. hypertrophy of Type I fibers

The amount of blood ejected from the left ventricle during each beat is a. cardiac output b. a-vO2 difference c. heart rate d. stroke volume

d. stroke volume

Which of the following explains the differences in aerobic power between men and women who are matched by age? a. Women have a higher percentage of body fat. b. Women have higher blood hemoglobin values. c. Men have a smaller heart size. d. Men have a smaller blood volume.

*a. Women have a higher percentage of body fat.

Which of the following is an effect of the Frank-Starling mechanism? a. increased cardiac emptying b. decreased stretch of the myocardial fibers c. decreased volume of systolic ejection d. increased parasympathetic stimulation

*a. increased cardiac emptying

Which of the following physiological characteristics decreases as an adaptation to aerobic endurance training? a. resting cardiac output b. resting arteriovenous oxygen difference c. maximal fiber shortening velocity d. maximal stroke volume

*a. resting cardiac output

Which of the following is a potential marker of aerobic overtraining? a. decreased submaximal exercise heart rate b. decreased total testosterone concentration c. increased heart rate variability d. increased body fat percentage

*b. decreased total testosterone concentration

All of the following are reasons why maximal aerobic power decreases with age EXCEPT a. decreased muscle mass b. lowered incidence of sarcopenia c. increased fat mass d. reduced muscle strength

*b. lowered incidence of sarcopenia

What is the MET equivalent of a of 55.0 ml·kg-1·min-1? a. 192.5 b. 55.0 c. 15.7 d. 2.1

*c. 15.7

Stroke volume is regulated by which of the following mechanisms? a. end-systolic volume and skeletal muscle pump b. skeletal muscle pump and end-diastolic volume c. end-diastolic volume and catecholamines d. catecholamines and end-systolic volume

*c. end-diastolic volume and catecholamines

Which of the following is the standard deviation of the 220 - age in years equation to estimate maximal heart rate? a. ±2 to 4 beats/min b. ±6 to 8 beats/min c. ±10 to 12 beats/min d. ±14 to 16 beats/min

*c. ±10 to 12 beats/min

Which of the following areas of the pulmonary system is not functional for gas exchange in healthy athletes? a. bronchi b. bronchioles c. physiological dead space d. anatomical dead space

*d. anatomical dead space

Which of the following are the immediate physiological adjustments to elevation (>3,900 ft [1,200 m])? a. decreased number of mitochondria and increased capillary density b. excretion of HCO3- and decreased plasma volume c. increased maximal heart rate and decreased stroke volume d. hyperventilation and increased cardiac output

*d. hyperventilation and increased cardiac output