PHYS final exam

Skeletal myofibers that are categorized as _____ have _____.

Slow-oxidative — lots of myoglobin

When skeletal myofiber is relaxing, calcium is ____ moved to a specific location via ____.

Actively - transporters

Brutus Buckeye went on a camping trip for Spring Break. Unfortunately, in his first packing attempt, he was unable to lift his backpack off the ground. While trying to lift this initial backpack, Brutus correctly knew he was doing an _____ contraction and his functional units were ____.

Isometric - shortening

Dr. Scarlet’s Patient X was born with a genetic condition that inhibits skeletal muscle development by about 50%. Dr. Scarlet correctly expects that Patient X, when compared to a typical individual, ____ they do.

Does more eccentric contractions than

Which is a correct statement about calcium during the transition to complete relaxation?

Its movement requires our Critical Equation #1 to be run in the forward direction

Which is a correct statement about the initial source of ATP for skeletal muscles?

It produces fewer ATPs per starting compound than Krebs cycle

During relaxation of skeletal muscle, calcium is moved to the ___ and the ___ level in the cytosol is decreasing.

Sarcoplasmic reticulum - ATP

Phys Phab Sophia has control of the “Magic Shrink Ray”, switched the size setting to “protein”, and finds herself next to a skeletal myofiber in the leg of a world champion marathon runner. Consequently, she is not surprised when she observes that this myofiber (like the majority of its neighboring myofibers)

Has a very small diameter

Which is a correct statement about a deltoid muscle (helps move the shoulder)

Its sarcomeres shorten regardless of whether the contraction is isotonic, isometric, or eccentric

To move from unfused to fused tetanus, that muscle’s motor neuron will need to increase its

Neither statement is correct

For the sources of ATP in skeletal myofibers, Phellow Physer Libby Thompson correctly stated that

Per starting compound, Krebs cycle and glycolysis create the same number of ATPs

While doing her regular bicep curls (held weight up to shoulder then back down). Phys Phab Lauren correctly stated that this process involves

A load that is always dependent

When considering the process of lifting a light and a heavier weight

Both statements are correct

Dr. Gray’s Patient X broke their tibia (larger lower leg bone) over the weekend. Dr. G, correctly explained that, even with only bone damage having occurred, the immobilization of their lower leg for the next few weeks will cause

Muscles in the area to experience atrophy

While in the Party Room you observed Phys Phab Max arrive and say “bye” to Phys Phab Ava but it was a couple of minutes before Ava left the room. Having just been focused on twitches, you correctly see this exchange as an analogy for a twitch where

A latent period exists until Ava left the room

Taking advantage of the beautiful weather earlier this week, your Phellow Physer Libby Thompson was playing Frisbee while barefoot on the oval. While running to make a catch, she stepped with her right foot on a sharp stone hidden in the grass. Considering the series of involuntary actions that next occurred to her, Libby correctly stated that

Her immediate actions were the direct result of information processed by her central nervous system.

Both smooth and skeletal muscle _____, but only smooth muscle _____.

Directly depend on cytosolic calcium - is relaxed at the bottom of the crossbridge cycling process

Which is a correct statement about insulin?

It has fewer, adjacent carbon rings than aldosterone

Which is a correct statement about the endocrine system?

Its endocrines are released by glands and neurons

Which is a correct statement about movements due to skeletal muscle?

It could be the result of the proprioception systems input from the Golgi tendon organ

Smooth muscle is controlled by the ____ nervous system and does not have _____.

Autonomic - troponin

Which is a correct statement about Endocrine 1s?

They are always produced and released by the hypothalamus

The neurohypophysis releases Endocrine ___.

2s

Phys Phab Kaitlyn was watching a track meet where multiple runners completed a race by handing off a baton. One race started with a blue-shirted runner handing off to a red-shirted runner who handed off to a green-shirted runner, who ultimately crossed the finish line. Using this race as an analogy for the endocrine system, Kaitlyn correctly stated that

When released by the green-shirted runner, the baton would be an Endocrine 3