Q: Which equation best represents the immediate pathway for ATP generation in muscle cells?

$$\text{Creatine phosphate} + \text{ADP} \rightarrow \text{Creatine} + \text{ATP}$$

Question 1

Which of the following correctly matches the muscle tissue type with its characteristics?

Accepted Answer

Skeletal muscle: voluntary, striated, attached to bones

Question 2

During muscle contraction, which event directly exposes the myosin binding site on actin?

Accepted Answer

Calcium binding to troponin causing tropomyosin to move

Question 3

Which structure stores calcium ions in a skeletal muscle fiber and releases them during contraction?

Accepted Answer

Sarcoplasmic reticulum

Question 4

A patient presents with muscle weakness due to a deficiency in acetylcholinesterase. What is the most likely effect at the neuromuscular junction?

Accepted Answer

Prolonged presence of acetylcholine in the synaptic cleft, causing continuous stimulation of the muscle fiber

Question 5

Which equation best represents the immediate pathway for ATP generation in muscle cells?

Accepted Answer

$$	ext{Creatine phosphate} + 	ext{ADP} ightarrow 	ext{Creatine} + 	ext{ATP}$$

Question 6

Which of the following best describes the change in sarcomere bands during muscle contraction?

Accepted Answer

The I band shortens, the H zone disappears, and the A band remains the same length

Question 7

Which of the following is a property unique to fast-twitch glycolytic muscle fibers compared to slow-twitch oxidative fibers?

Accepted Answer

Rapid contraction speed and low endurance

Question 8

A muscle is named 'rectus femoris.' Which characteristic is used in its naming?

Accepted Answer

Location

Question 9

Which of the following best defines the term 'origin' in muscle anatomy?

Accepted Answer

The point where the muscle attaches to the stationary bone

Question 10

Which glial cell is responsible for forming the myelin sheath in the central nervous system?

Accepted Answer

Oligodendrocyte

Question 11

Which neurotransmitter is primarily involved in the stimulation of skeletal muscle contraction?

Accepted Answer

Acetylcholine

Question 12

During the generation of an action potential, which ionic movement is responsible for depolarization?

Accepted Answer

Influx of Na$$^+$$ ions

Question 13

Which equation represents the resting membrane potential of a neuron?

Accepted Answer

$$V_m = -70\ 	ext{mV}$$

Question 14

Which of the following best describes the function of astrocytes in the nervous system?

Accepted Answer

Form the blood-brain barrier and regulate the environment around neurons

Question 15

A neuron receives multiple excitatory postsynaptic potentials (EPSPs) at different locations simultaneously. Which type of summation is occurring?

Accepted Answer

Spatial summation

Question 16

Which of the following best describes the difference between saltatory and continuous conduction?

Accepted Answer

Saltatory conduction involves action potentials jumping between nodes of Ranvier, increasing speed

Question 17

Which neurotransmitter is most likely to be released from a neuron to inhibit postsynaptic activity?

Accepted Answer

GABA

Question 18

Which of the following best describes the relationship between the size of a motor unit and the degree of control in skeletal muscles?

Accepted Answer

Smaller motor units provide finer control

Question 19

Which of the following is a multi-step process that occurs during muscle relaxation?

Accepted Answer

ACh is removed from the synaptic cleft, calcium is pumped back into the sarcoplasmic reticulum, and the troponin-tropomyosin complex covers the myosin binding site

Question 20

Which of the following best describes the function of myoglobin in muscle cells?

Accepted Answer

Stores oxygen for aerobic respiration

BIO 141 Unit 3: Muscle Tissue, Muscular System, and Nervous Tissue – Comprehensive Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드