BHK Bachelor of Kinesiology MCQ 3

Question 1

Which type of muscle fiber has the highest oxidative capacity and fatigue resistance?

Accepted Answer

Type I (slow-twitch oxidative)

Answer

Type I slow-twitch fibers contain abundant mitochondria and myoglobin, giving them the highest oxidative capacity and greatest resistance to fatigue.

Question 2

In biomechanics, the moment of inertia of a rotating body is most influenced by:

Accepted Answer

The distribution of mass relative to the axis of rotation

Answer

Moment of inertia depends on both the total mass and how that mass is distributed around the axis; mass farther from the axis increases inertia more.

Question 3

What is the primary function of the stretch-shortening cycle (SSC) in plyometric movements?

Accepted Answer

To store and reuse elastic energy and enhance neural activation for greater power output

Answer

The SSC involves a pre-stretch (eccentric phase) that stores elastic energy in tendons and activates the stretch reflex, which is then released in the concentric phase to amplify power.

Question 4

During maximal aerobic exercise, cardiac output is most influenced by increases in:

Accepted Answer

Heart rate primarily, with stroke volume plateauing early

Answer

While both components increase, stroke volume plateaus at moderate intensities, and further increases in cardiac output at high intensities are driven mainly by rising heart rate.

Question 5

The rotator cuff muscles are collectively responsible for which primary function at the glenohumeral joint?

Accepted Answer

Dynamic stabilization of the humeral head within the glenoid fossa

Answer

The four rotator cuff muscles (SITS: supraspinatus, infraspinatus, teres minor, subscapularis) compress the humeral head into the glenoid, providing dynamic joint stability.

BHK - Bachelor of Kinesiology Practice Test

BHK - Bachelor of Kinesiology Practice Test

BHK Bachelor of Kinesiology MCQ 3