Q: Which equation correctly represents the hydrolysis of ATP during muscle contraction?

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{P}_i + \text{energy}$$

Q: Which equation represents the Nernst equation for calculating the equilibrium potential of an ion across a membrane?

$$E = \frac{RT}{zF} \ln \left( \frac{[\text{ion}]_{\text{outside}}}{[\text{ion}]_{\text{inside}}} \right)$$

Question 1

Which of the following best describes the difference between skeletal, cardiac, and smooth muscle tissue?

Accepted Answer

Skeletal muscle is striated and voluntary, cardiac muscle is striated and involuntary, and smooth muscle is non-striated and involuntary.

Question 2

Which connective tissue sheath surrounds individual muscle fibers?

Accepted Answer

Endomysium

Question 3

During the Sliding Filament Theory of muscle contraction, which event occurs immediately after calcium ions bind to troponin?

Accepted Answer

Tropomyosin shifts, exposing myosin-binding sites on actin.

Question 4

A patient presents with muscle weakness and rapid fatigue after minimal exertion. Laboratory tests reveal antibodies against acetylcholine receptors. Which condition is most likely?

Accepted Answer

Myasthenia gravis

Question 5

Which equation correctly represents the hydrolysis of ATP during muscle contraction?

Accepted Answer

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy}$$

Question 6

Which of the following is the correct order of events at the neuromuscular junction leading to muscle contraction?

Accepted Answer

Acetylcholine release, sodium influx, action potential, calcium release

Question 7

Which muscle attachment is typically more stationary during contraction?

Accepted Answer

Origin

Question 8

A muscle is stimulated repeatedly at a high frequency, resulting in a sustained contraction without relaxation. What is this phenomenon called?

Accepted Answer

Tetanus

Question 9

Which of the following best describes the role of myelin in the nervous system?

Accepted Answer

It increases the speed of nerve impulse conduction by insulating axons.

Question 10

Which equation represents the Nernst equation for calculating the equilibrium potential of an ion across a membrane?

Accepted Answer

$$E = \frac{RT}{zF} \ln \left( \frac{[	ext{ion}]_{	ext{outside}}}{[	ext{ion}]_{	ext{inside}}} ight)$$

Question 11

Which neuroglial cell is responsible for producing cerebrospinal fluid (CSF) in the central nervous system?

Accepted Answer

Ependymal cell

Question 12

A patient suffers a stroke affecting the motor cortex of the cerebrum. Which function is most likely impaired?

Accepted Answer

Voluntary movement of skeletal muscles

Question 13

Which neurotransmitter is primarily excitatory in the central nervous system?

Accepted Answer

Glutamate

Question 14

Which of the following best describes the function of the limbic system?

Accepted Answer

Control of emotional responses and memory formation

Question 15

Which structure in the brainstem is responsible for regulating breathing and heart rate?

Accepted Answer

Medulla oblongata

Question 16

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulation of body temperature and hunger

Question 17

Which equation best represents the relationship between force, cross-sectional area, and muscle tension?

Accepted Answer

$$F = \sigma \cdot A$$

Question 18

A patient is unable to maintain posture due to loss of muscle tone. Which term best describes this condition?

Accepted Answer

Hypotonia

Question 19

Which of the following best explains why muscle fatigue occurs during prolonged exercise?

Accepted Answer

Accumulation of lactic acid and depletion of ATP

Question 20

Which of the following is a correct description of a synapse?

Accepted Answer

A junction between two neurons where neurotransmitters are released

Comprehensive Study Guide: Muscular and Nervous Systems in Anatomy & Physiology

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