Why is normalizing surface EMG recordings with a maximal voluntary contraction (MVC) imperative? Select any that apply.   Reference: Ch. 15

Below are EMG traces from bipolar surface electrodes placed on four muscles, recorded at once. The trace at the bottom is the force, which shows that the subject increased force almost immediately, and maintained a target level of force production for several minutes. The force trace was recorded by a force-measuring device placed beneath a foot pedal; so, pressing down on the pedal with the foot produced the change in force shown on the bottom. Based on this information, which of the EMG traces below corresponds to the agonist muscle producing the force?    Image description: Labels A-D relate to muscle activation traces relative to a force trace on the bottom.   Reference: Ch. 15

The absolute force at which a motor unit is recruited decreases with an increase in contraction speed.   Reference: Duchateau & Enoka (2011)

What is the primary limitation of the subcutaneous needle electrode, especially compared to the intramuscular electrodes developed earlier?   Reference: Duchateau & Enoka (2011)

In biomarker monitoring, one of the first steps within the first phase is [1], followed by [2] in the second phase, and completed with [3] in the third and last phase.   Reference: Ch. 16

For the following  transaction provided and select the appropriate journal entry. Oct 10.    Purchased three pieces of equipment for $200,000, paying $50,000 cash and signing a note for the remainder.

Disregarding what you’d like to study in an experiment, imagine your subjects are incredibly sensitive and vulnerable. You’d like to measure muscle activity but need to be considerate of the technique implemented to do so. Which technique should you consider using to minimize subject discomfort and risk?   Reference: Ch. 15

For the following  transaction provided and select the appropriate journal entry. Oct 31.      Depreciation on the equipment for October is $15,000.

A company reported the following information for the year ended December 31, 2020:  Beginning Retained Earnings                                                                   $150,000           For 2021 they reported: Revenue $255,000 Expenses 70,000 Dividends 10,000 What was the retained earnings balance at December 31, 2021?

The following information relates to Purple Company for the year 2021. Retained Earnings, January 1, 2021 $ 44,000    Rent expense  $11,500                                         Supplies expense      $19,500 Unearned Revenue $17,500 Dividends during 2021  $ 5,700 Revenue (Fees Earned) $170,000    Accounts Payable $43,000 Utilities expense $5,500 Insurance expense $51,000 Depreciation expense $13,500 Inventory  $100,000 Accounts Receivable $6,730     Prepare an Income Statement for Purple Company for December 31, 2021