Chapter 4 - Biomechanics of Resistance Exercise

Question 203

anatomical/practical example of 1st class lever.

Answer 203

see-saw;the forearm during elbow extension against resistance (tri extensions)

Question 204

anatomical/practical 2nd class lever

Answer 204

wheelbarrow- prac plantar flexion of the foot- ana

Question 205

fulcrum/force theory for 1st class levers

Answer 205

force is opposite sides of fulcrum

Question 206

fulcrum/force theory for 2nd class levers

Answer 206

force on same side of fulcrum, muscle force has bigger lever than the resistive force

Question 207

fulcrum/force theory for 3rd class levers

Answer 207

force on same side of fulcrum, muscle force has a shorter lever than the resistive force

Question 208

radiate muscle example

Answer 208

Gluteus Medius

Question 209

longitudinal muscle example

Answer 209

rectus abdominus

Question 210

fusiform muscle example

Answer 210

biceps brachii

Question 211

multipennate muscle example

Answer 211

deltoid

Question 212

bipennate muscle example

Answer 212

rectus femoris

Question 213

unipennate muscle example

Answer 213

tibialis posterior

Question 214

muscle generates the greatest force at its _________ length.

Answer 214

resting

Question 215

body size classic formula

Answer 215

load lifted __________ body weight to the 2/3 power.

Question 216

surface drag results from

Answer 216

the friction of a fluid passing along a surface

Question 217

form drag results from

Answer 217

the way in which a fluid presses against the front or rear of an object passing through it.

Question 218

lordotic back meaning

Answer 218

slightly arched

Question 219

kyphotic back meaning

Answer 219

naturally s shaped slightly rounded back

Question 220

muscles of the rotator cuff.

Answer 220

supraspinatus, infraspinatus, subscapularis, and teres minor

Question 221

sagittal plane:

Answer 221

slices body into left and right planes

Question 222

frontal plane:

Answer 222

slices body into front and back

Question 223

transverse plane:

Answer 223

upper and lower body sections

Question 224

which of the following best describes a knee joint?

synovial

cartilaginous

ball and socket

pivot

Answer 224

synovial

Question 225

which of the following is the definition of power?

force x velocity

mass x acceleration

torque x time

force x distance

Answer 225

force x veloctiy

Question 226

to compare performances of olympic weights lifters of different body weights, the classic formula divides the load lifted by the athletes:

body weight

body weight squared l

ean body weight body

weight to the two-thirds power

Answer 226

body weight to the two-thirds power

Question 227

during a free weight exercise, muscle force varies with which of the following? perp. distance from the weight to the body point joint angle movement acceleration movement velocity squared

Answer 227

perp distance / movement acceleration

Question 228

a vertical jump involved knee hip and should movement primarily in which plane? sagittal perpendicular frontal transverse

Answer 228

sagittal

Question 229

An athlete is performing concentric isokenetic elbow flexion and extension. which of the following types of levers occur at the elbow during this exercise? 1st 2nd 3rd

Answer 229

1st and 3rd

Question 230

\_\_\_\_\_\_\_\_ joints operate as hinges and move in one place of motion.

Answer 230

uniaxial

Question 231

The _____ and _______ are examples of biaxial joints.

Answer 231

ankle and wrist

Question 232

3rd class lever anatomical and pracitcal example

Answer 232

the forearm; elbow flexion against resistance (biceps curl)

Question 233

\_\_\_\_\_\_\_\_\_ ________ is the objects rotational speed, measured in radians per second.

Answer 233

angular velocity

Question 234

rotational work = _____ \* \_\_\_\_\_\_\_

Answer 234

torque \* angular displacement

Question 235

Muscle directly involved in movement, also known as prime mover is \_\_\_\_\_\_\_\_\_\_.

Answer 235

agonist

Question 236

A muscle that can slow down or stop the action is known as \_\_\_\_\_\_\_\_\_\_\_.

Answer 236

antagonist

Question 237

muscle acting in assistance to stabilize the main muscles being used \_\_\_\_\_\_\_\_\_.

Answer 237

synergist