EEOB 2520 - Physiology - Exam 9 Test
Questions Fully Solved.
What types of processes occur in skeletal muscles? - Answer - fast glycolytic
- slow oxidative
- fast oxidative
Atrophy - Answer disuse/disease
Hypertrophy - Answer use, especially exercise
Aerobic Hypertrophy - Answer - high vascularization
- high number of mitochondria
- less fatigue
What does an increase in vascularization cause? - Answer - change in path and amount of
blood flow
- add vessels to an area
What does an increase in mitochondria cause? - Answer more ATP produced
Anaerobic Hypertrophy - Answer - either intense or prolonged
- increases myofiber diameter
- increase glycolytic enzymes
What does an increase in myofiber diameter cause? - Answer - more pull capacity
- more myosin grabbing actin
How does skeletal muscle control body movement? - Answer stimulation ONLY
Muscle Stimulation - Answer - MUST work in pairs
- flexor & extensor
- afferent NS monitors where body is in space
Label flexor & extensor in bicep curls - Answer flexor: bicep
, extensor: tricep
Proprioception System Neuron Type - Answer afferent
Somatosensory NS - Answer touch + proprioception
Proprioception System - Answer - loads on muscles & tendons
- signals received in spindle & Golgi
How is information provided to spindle & Golgi? - Answer tendons stretch
Spinal Reflex - Answer - involuntary contraction
- action completed by spine NOT motor cortex
Spinal Reflex Examples - Answer - knee jerk
- withdrawl
Knee Jerk Response - Answer - stretch patellar ligament/tendon
- quad stretches
- estensor: quad
- flexor: patellar ligament
Path of Information when Patellar Ligament is Stretched - Answer spinal cord --> brain stem
--> thalamus --> somatosensory
Where do muscle spindle & Golgi send info to? - Answer afferent NS
Where does afferent NS send info to? - Answer cerebral cortex/cerebrum
Withdrawl Response - Answer - nociceptors activated when threshold pain occurs
- achieve coordinated movement away from painful stimulus
Process of Withdrawl Response - Answer - info to cerebrum --> spine
- contract: flexor & contralateral extensor
- relax: extensor & contralateral flexor
Questions Fully Solved.
What types of processes occur in skeletal muscles? - Answer - fast glycolytic
- slow oxidative
- fast oxidative
Atrophy - Answer disuse/disease
Hypertrophy - Answer use, especially exercise
Aerobic Hypertrophy - Answer - high vascularization
- high number of mitochondria
- less fatigue
What does an increase in vascularization cause? - Answer - change in path and amount of
blood flow
- add vessels to an area
What does an increase in mitochondria cause? - Answer more ATP produced
Anaerobic Hypertrophy - Answer - either intense or prolonged
- increases myofiber diameter
- increase glycolytic enzymes
What does an increase in myofiber diameter cause? - Answer - more pull capacity
- more myosin grabbing actin
How does skeletal muscle control body movement? - Answer stimulation ONLY
Muscle Stimulation - Answer - MUST work in pairs
- flexor & extensor
- afferent NS monitors where body is in space
Label flexor & extensor in bicep curls - Answer flexor: bicep
, extensor: tricep
Proprioception System Neuron Type - Answer afferent
Somatosensory NS - Answer touch + proprioception
Proprioception System - Answer - loads on muscles & tendons
- signals received in spindle & Golgi
How is information provided to spindle & Golgi? - Answer tendons stretch
Spinal Reflex - Answer - involuntary contraction
- action completed by spine NOT motor cortex
Spinal Reflex Examples - Answer - knee jerk
- withdrawl
Knee Jerk Response - Answer - stretch patellar ligament/tendon
- quad stretches
- estensor: quad
- flexor: patellar ligament
Path of Information when Patellar Ligament is Stretched - Answer spinal cord --> brain stem
--> thalamus --> somatosensory
Where do muscle spindle & Golgi send info to? - Answer afferent NS
Where does afferent NS send info to? - Answer cerebral cortex/cerebrum
Withdrawl Response - Answer - nociceptors activated when threshold pain occurs
- achieve coordinated movement away from painful stimulus
Process of Withdrawl Response - Answer - info to cerebrum --> spine
- contract: flexor & contralateral extensor
- relax: extensor & contralateral flexor
