Ohlsen muscular system

How does skeletal muscle tissue contribute to homeostasis?

• by generating heat that helps maintain body temperature

• by moving materials through the body

• by pumping blood through the body

• all of these

Tags

NGSS.HS-LS1-3

How can muscle fibers produce ATP?

• from direct phosphorylation by creatine phosphate

• through aerobic respiration

• through anaerobic respiration (lactic acid fermentation)

• all of these

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

What is required to be released by the sarcoplasmic reticulum in order for the actin-myosin cross bridges to form?

• ACh

• ATP

• Ca+2

• tropin

The contracted sarcomere is _______ than the relaxed sarcomere.

• longer

• shorter

• the same length

• all of these are possible depending on the type of sarcomere

The biceps brachii and triceps brachii are on opposite sides of the arm because

• they work together to flex the arm.

• they work together to extend the arm.

• they are synergists of each other.

• they work against each other.

Acetylcholine

• is the neurotransmitter at the neuromuscular junction.

• is broken down by acetylcholinesterase.

• binds to receptors on the muscle cell membrane.

• all of these

A motor unit includes

• muscle fibers only.

• motor neurons only.

• several motor neurons and one muscle fiber.

• several muscle fibers and one motor neuron.

Which type of fascicle arrangement has more power?

• bipennate

• strap (parallel)

• circular

• all these have the same power

Which of the following muscles is named due to its shape?

• adductor longus

• deltoid

• supinator

• triceps brachii

Which of the following muscles is named due to its size?

• deltoid

• extensor digitorum

• rectus abdominis

• vastus lateralis